WO2024000524A1 - 制动方法、装置、电子设备、车辆和介质 - Google Patents
制动方法、装置、电子设备、车辆和介质 Download PDFInfo
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- WO2024000524A1 WO2024000524A1 PCT/CN2022/103153 CN2022103153W WO2024000524A1 WO 2024000524 A1 WO2024000524 A1 WO 2024000524A1 CN 2022103153 W CN2022103153 W CN 2022103153W WO 2024000524 A1 WO2024000524 A1 WO 2024000524A1
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- braking
- torque
- braking torque
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- energy recovery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
- B60L7/18—Controlling the braking effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/24—Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
- B60L7/26—Controlling the braking effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/24—Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/10—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels by utilising wheel movement for accumulating energy, e.g. driving air compressors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18127—Regenerative braking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D61/00—Brakes with means for making the energy absorbed available for use
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/46—Drive Train control parameters related to wheels
- B60L2240/461—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/60—Navigation input
- B60L2240/64—Road conditions
- B60L2240/647—Surface situation of road, e.g. type of paving
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2250/00—Driver interactions
- B60L2250/26—Driver interactions by pedal actuation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/10—Indicating wheel slip ; Correction of wheel slip
- B60L3/106—Indicating wheel slip ; Correction of wheel slip for maintaining or recovering the adhesion of the drive wheels
- B60L3/108—Indicating wheel slip ; Correction of wheel slip for maintaining or recovering the adhesion of the drive wheels whilst braking, i.e. ABS
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/60—Regenerative braking
- B60T2270/604—Merging friction therewith; Adjusting their repartition
Definitions
- the present invention relates to the field of braking technology, and specifically to braking methods, devices, electronic equipment, vehicles and media.
- CRBS coordinated braking energy recovery systems
- ABS anti-lock braking system
- Some coordination methods attempt to ensure vehicle stability while taking into account energy recovery. However, these methods do not consider the differences between the drive motor that performs energy recovery torque and the braking component that performs friction torque, making it difficult to control the stability of the vehicle, and the energy recovery efficiency is low.
- Embodiments of the present application provide solutions for vehicle braking. This solution considers the characteristics of the braking component that executes the friction torque of the drive motor that executes the energy recovery torque, and optimally distributes the braking demand torque to the energy recovery braking torque and the friction braking torque, providing wheel anti-locking and Coordinated control between energy recovery.
- a vehicle braking method including: obtaining the braking demand torque of the wheel; and determining the variation of the energy recovery braking torque of the wheel based on the variation of the braking demand torque of the wheel. and the change amount of friction braking torque, where the change amount of braking demand torque is the sum of the change amount of energy recovery braking torque and the change amount of friction braking torque.
- this method coordinated control between friction braking and energy recovery braking during emergency braking can be achieved, and energy recovery can be fully utilized to quickly respond to braking needs. Compared with traditional solutions, this method has higher energy recovery efficiency, faster control response, and enhanced vehicle body stability during emergency braking.
- determining the change amount of the energy recovery braking torque and the change amount of the friction braking torque of the wheel may include: if the change rate of the braking demand torque is greater than or equal to a threshold change rate, based on the energy recovery
- the first preset ratio between the change amount of the braking torque and the change amount of the friction braking torque determines the change amount of the energy recovery braking torque and the change amount of the friction braking torque.
- determining the change amount of the energy recovery braking torque and the change amount of the friction braking torque of the wheel may include: if the vehicle speed is greater than or equal to the threshold vehicle speed and the wheel speed is greater than or equal to the threshold wheel speed, then The change amount of the energy recuperation braking torque and the change amount of the friction braking torque are determined based on a second preset ratio between the change amount of the energy recuperation braking torque and the change amount of the friction braking torque, and the second preset ratio is greater than First preset ratio. Based on this method, when the vehicle speed or wheel speed is high and the driving motor speed is high, which is conducive to energy recovery, energy recovery is given priority for braking.
- determining the change amount of the energy recovery braking torque and the change amount of the friction braking torque of the wheel may include: if the road adhesion coefficient is greater than or equal to the threshold coefficient, based on the change of the energy recovery braking torque
- the third preset ratio between the change amount of the energy recovery braking torque and the change amount of the friction braking torque determines the change amount of the energy recovery braking torque and the change amount of the friction braking torque, and the third preset ratio is smaller than the first preset ratio. Based on this method, when energy recovery conditions are poor but road conditions are good, friction braking is used first.
- obtaining the braking demand torque of the wheel includes obtaining the braking demand torque from an anti-lock braking system (ABS), and the method may further include enabling energy recovery braking of the wheel before the ABS is activated.
- the torque is less than the upper limit of energy recovery torque. Based on this approach, the available space for energy recovery braking torque can be reserved, thereby meeting large fluctuations in braking demand torque.
- the upper limit value is determined based on the current maximum charging power of the vehicle battery and the current maximum regenerative torque of the electric machine. Based on this method, the maximum energy recovery torque can be determined accurately and in real time, ensuring the reliability of braking.
- the method may further include reducing the friction braking torque in response to the vehicle exiting the emergency braking state. In some embodiments, the method may further include: controlling braking or coasting of the vehicle by controlling regenerative braking torque after the friction braking torque is reduced to zero. Based on this method, emergency braking can be exited smoothly, avoiding a sense of frustration.
- the method may further include responding to a reduction in the stroke of the brake pedal that is greater than a preset value within a preset time, a stroke of the brake pedal being less than a preset stroke, or receiving an automatic emergency response. Indicates the end of braking to confirm that the vehicle has exited the emergency braking state. Based on this method, vehicle state changes can be determined in time to help maintain vehicle stability during braking.
- the method may be performed by at least one of an intelligent brake controller of the vehicle, a drive motor controller of the vehicle, or an entire vehicle controller of the vehicle.
- this method is executed by the vehicle's intelligent brake controller, the delay in obtaining the braking demand via the communication line is low, and the braking response can be made in a timely manner.
- the response delay of the drive motor torque can be further reduced, and the friction braking torque is not as sensitive to communication delays as the drive motor torque. This further reduces the impact of communication time delay on the overall control effect, obtains better control effect, and improves vehicle stability.
- the control cycle can be shortened, and the same communication line can enable the brake controller and the drive motor controller to have the same communication time delay. This allows the corresponding time delay to be uniformly compensated during the control process, thereby obtaining better control effects and improving vehicle stability.
- a method of braking a vehicle includes: responding to the emergency braking of the vehicle, increasing the friction braking torque of the wheel when the energy recovery braking torque of the wheel has reached its upper limit value; and responding to the acceleration of the braking demand torque of the wheel. Decrease, reduce the energy recovery braking torque from the upper limit value, and continue to increase the friction braking torque, where the sum of the energy recovery braking torque and the friction braking torque is the braking demand torque. Based on this method, the available space for energy recovery braking torque can be reserved, so that large fluctuations in braking demand torque can be met.
- the method may further include: determining an upper limit value of the energy recuperation braking torque based on the current maximum charging power of the vehicle battery and the current maximum recuperation torque of the motor. Based on this method, the maximum energy recovery torque can be determined accurately and in real time to ensure braking reliability.
- the method may further include, in response to an increase in the stroke of the brake pedal being greater than a preset value within a preset time, the stroke of the brake pedal being greater than or equal to the preset stroke, receiving activation of the automatic Emergency braking indication, confirming that the vehicle has undergone emergency braking. Based on this method, vehicle status changes can be determined in time to help maintain vehicle stability.
- the method may further include: determining a regenerative braking torque performed by the electric machine based on the regenerative braking torque of the wheel and the regenerative braking torque of the other wheel; and based on the braking torque of the wheel.
- the dynamic demand torque and the energy recovery braking torque executed by the electric motor determine the friction braking torque for execution by the friction disc. Based on this method, the executable energy recovery torque and friction braking torque can be determined from the energy recovery braking torque of a group of wheels, so that the drive motor and friction actuator can complete actual braking.
- reducing the regenerative braking torque includes: reducing the regenerative braking torque to a preset torque, the preset torque being based on an upper limit of the regenerative braking torque and the braking demand torque. Determine at least one of them. Based on this approach, the energy recovery braking torque can be maintained within a better range, thereby being able to more flexibly meet changes in braking demand torque.
- the method may further include: in response to the vehicle exiting emergency braking, reducing the friction braking torque while keeping the regenerative braking torque substantially unchanged. In some embodiments, after the friction braking torque is reduced to zero, braking or coasting of the vehicle is controlled by controlling the regenerative braking torque. Based on this method, emergency braking can be exited smoothly, avoiding a sense of frustration.
- the method may further include: in response to the reduction amount of the brake pedal stroke within the preset time being greater than a preset value, the brake pedal stroke being less than the preset stroke, or receiving an automatic Indicates the end of emergency braking and confirms that the vehicle exits the emergency braking state. Based on this method, vehicle state changes can be determined in time to help maintain vehicle stability during braking.
- the method may further include: in response to activation of an anti-lock braking system (ABS) of the vehicle: obtaining a braking demand torque of the wheel from the ABS, and obtaining a braking demand torque of the wheel based on the braking demand torque of the wheel.
- ABS anti-lock braking system
- the change amount determines the change amount of the wheel's energy recuperation braking torque and the friction braking torque change amount, where the change amount of the braking demand torque is the sum of the change amount of the energy regeneration braking torque and the friction braking torque change amount. Based on this method, coordinated control between friction braking and energy recovery braking during emergency braking can be achieved, and energy recovery can be fully utilized to quickly respond to significantly changing braking needs.
- determining the change amount of the wheel's energy recovery braking torque and the change amount of the friction braking torque may include: if the change rate of the braking demand torque is greater than or equal to a threshold change rate, based on the energy recovery
- the first preset ratio between the change amount of the braking torque and the change amount of the friction braking torque determines the change amount of the energy recovery braking torque and the change amount of the friction braking torque.
- determining the change amount of the energy recovery braking torque and the change amount of the friction braking torque of the wheel may further include: if the vehicle speed is greater than or equal to the threshold vehicle speed and the wheel speed is greater than or equal to the threshold wheel speed, The change amount of the energy recuperation braking torque and the change amount of the friction braking torque are determined based on a second preset ratio between the change amount of the energy recuperation braking torque and the change amount of the friction braking torque, and the second preset ratio is greater than First preset ratio. Based on this method, when the vehicle speed is high and the drive motor speed is high, which is conducive to energy recovery, energy recovery is given priority for braking.
- determining the change amount of the energy recovery braking torque and the change amount of the friction braking torque of the wheel may include: if the road adhesion coefficient is greater than or equal to the threshold coefficient, determining the change amount based on the energy recovery braking torque.
- a third preset ratio between the change amount and the change amount of the friction braking torque determines the change amount of the energy recovery braking torque and the change amount of the friction braking torque, and the third preset ratio is smaller than the change amount of the friction braking torque.
- the first preset ratio Based on this method, when energy recovery conditions are poor but road conditions are good, friction braking is used first.
- the method is performed by at least one of the following: an intelligent brake controller of the vehicle; a drive motor controller of the vehicle; or an entire vehicle controller of the vehicle.
- an electronic device comprising: at least one processing unit; at least one memory, the at least one memory being coupled to the at least one processing unit and storing instructions for execution by the at least one processing unit, the instructions When executed by at least one processing unit, the electronic device is caused to execute the method according to the first aspect or the second aspect of the application.
- a braking device includes a braking demand acquisition unit.
- the braking demand acquisition unit is configured to acquire the braking demand torque of the wheel.
- the brake device also includes a control unit.
- the control unit is configured to determine a change amount of energy recovery braking torque and a change amount of friction braking torque of the wheel based on the change amount of the braking demand torque of the wheel, wherein the change amount of the braking demand torque is the energy recovery The sum of the change in braking torque and the change in friction braking torque.
- a braking device including a control unit.
- the control unit is configured to, in response to emergency braking of the vehicle, increase the friction braking torque of the wheel when the energy recovery braking torque of the wheel has reached an upper limit value.
- the control unit is further configured to reduce the regenerative braking torque from the upper limit value and continue to increase the friction braking torque in response to the reduction in the increase in braking demand torque of the wheel, wherein the regenerative braking torque and the friction braking torque The sum of the dynamic torques is the braking demand torque.
- a vehicle is provided.
- the vehicle includes the braking device according to the fourth or fifth aspect of the present application.
- a computer-readable storage medium on which a computer program is stored, and when executed by a processor, the computer program implements the method described in the first or second aspect of the present application. method.
- a computer program product including computer-executable instructions, wherein the computer-executable instructions, when executed by a processor, implement the method according to the first or second aspect of the present application. .
- Figure 1 shows a schematic diagram of a vehicle system architecture provided by an embodiment of the present application
- Figure 2 shows a schematic diagram of a brake-by-wire and electric drive system provided by an embodiment of the present application
- Figure 3 shows a schematic diagram of a braking system provided by an embodiment of the present application
- Figure 4 shows a schematic flow chart of a process for braking a vehicle provided by an embodiment of the present application
- Figure 5 shows a schematic flow chart for performing another process of braking a vehicle provided by an embodiment of the present application
- Figure 6 shows a schematic flow chart of the entry process of coordinated control of ABS and energy recovery provided by the embodiment of the present application
- Figure 7 shows a schematic graph of the braking torque as a function of time according to the entry process shown in Figure 6;
- Figure 8 shows a schematic flow chart of the exit process of coordinated control of ABS and energy recovery provided by an embodiment of the present application
- Figure 9 shows a schematic graph of the braking torque as a function of time according to the withdrawal process shown in Figure 8;
- Figure 10 shows a schematic flow chart of a process for braking a vehicle provided by an embodiment of the present application
- Figure 11 shows a schematic flow chart of the process of coordinated control of ABS and energy recovery provided by the embodiment of the present application
- Figure 12 shows a schematic curve diagram of the coordinated control process of ABS and energy recovery when parking is about to stop according to an embodiment of the present application
- Figure 13 shows a schematic curve diagram of the ABS and energy recovery coordinated control process on a high-adhesion road surface according to an embodiment of the present application
- Figure 14 shows a schematic curve diagram of the ABS and energy recovery coordinated control process on a low-adhesion road surface according to an embodiment of the present application
- Figure 15 shows a schematic curve diagram of exiting the ABS process midway during braking on a high-adhesion road surface according to an embodiment of the present application
- Figure 16 shows a schematic diagram of another braking system provided by an embodiment of the present application.
- Figure 17 shows a schematic diagram of yet another braking system provided by an embodiment of the present application.
- Figure 18 shows a schematic block diagram of a braking device according to an embodiment of the present application.
- Figure 19 shows a schematic block diagram of another braking device according to an embodiment of the present application.
- ABS Anti-Lock Braking System
- Cooperative Regenerative Braking System The vehicle dynamically allocates friction braking torque and motor energy recovery braking torque according to the driver's braking needs and the status of the motor, battery and other systems.
- AEB Autonomous Emergency Braking
- VCU Vehicle Control Unit
- the central control unit of the vehicle is the core of the entire control system.
- the VCU collects motor and battery status, accelerator pedal signals, brake pedal signals, actuator and sensor signals, and makes corresponding judgments based on comprehensive analysis of the driver's intentions. It is responsible for vehicle driving control, accessory management, energy management, fault handling, information interaction, etc.
- Motor Controller controls the rotation state of the motor according to the received instructions, drives the vehicle or performs energy recovery, etc.
- Intelligent Brake Unit According to the vehicle status and braking torque requirements, the friction braking torque and energy recovery torque on each wheel are allocated to ensure the stability and energy recovery efficiency of the vehicle during braking.
- Intelligent Pedal Unit Recognizes the driver's braking intention based on the driver's movements on the brake pedal, ensuring the stability and energy recovery efficiency of the vehicle during braking.
- the integrated booster is the core of the braking system and integrates the Electronic Control Unit (ECU), pedal stroke sensor, brake master cylinder, motor, push rod mechanism, etc.
- ECU Electronic Control Unit
- An intelligent braking unit and an intelligent pedal unit can be integrated into the integrated booster.
- Battery Management System Intelligent management and maintenance of battery units, preventing battery overcharge and over-discharge, extending battery life, monitoring battery status, etc.
- BMS generally has functions such as voltage measurement, energy balancing, SOC calculation, and battery status monitoring.
- Vehicles are undergoing changes in electrification, connectivity, and intelligence.
- various systems including the braking system are also facing changes and upgrades.
- the structural changes and functional upgrades of the braking system are closely related to the innovation of the vehicle architecture. Specifically, each system of the vehicle will be described below with reference to Figure 1 .
- FIG. 1 is a schematic diagram of a vehicle 100 provided by an embodiment of the present application.
- Vehicle 100 may include various subsystems, such as infotainment system 110 , perception system 120 , decision control system 130 , drive system 140 , and computing platform 150 .
- vehicle 100 may include more or fewer subsystems, and each subsystem may include multiple components.
- each subsystem and component of vehicle 100 may be interconnected through wired or wireless means.
- the braking system 135 is one of its most critical systems, which is directly related to the overall performance of the vehicle and the safety of life and property of the occupants. Braking system 135 may be used to control the speed of vehicle 100 . Braking system 135 may slow wheel 144 rotational speed through friction. Friction braking is sometimes referred to as hydraulic braking in this article. In some embodiments, the braking system 135 may also have a regenerative braking function.
- the braking system 135 may also control the speed of the vehicle 100 in other ways.
- the energy recovery braking function when the vehicle is decelerating or braking, part of the mechanical energy of the vehicle can be converted into electrical energy through the motor and stored in the battery, while a part of the braking force is generated to achieve deceleration or braking of the vehicle.
- the motor converts the energy stored in the battery into kinetic energy for the car to move.
- energy recovery braking faces challenges such as braking intensity limitations, it cannot meet the needs of all braking conditions. For this reason, hydraulic braking systems still have high application value in new energy vehicles.
- the vehicle 100 provided by the embodiment of the present application can be configured in a fully or partially autonomous driving mode.
- the vehicle 100 can obtain its surrounding environment information through the sensing system 120, and obtain an autonomous driving strategy based on the analysis of the surrounding environment information to achieve fully autonomous driving, or present the analysis results to the user to achieve partially autonomous driving.
- the vehicle 100 can adjust its own vehicle speed by sensing its surrounding environment.
- the surrounding environment may include traffic participants such as other vehicles and/or pedestrians, as well as roads, infrastructure, or other objects.
- the vehicle 100 can autonomously identify the surrounding environment and determine the vehicle's speed based on information about objects in the environment (such as speed, acceleration, distance from the own vehicle, etc.).
- Improvements in vehicle computing and control resources provide more options for the design of braking system control methods.
- some or all functions of the vehicle 100 provided by the embodiment of the present application are controlled by the computing platform 150 .
- Computing platform 150 may control various functions of vehicle 100 based on inputs received from various subsystems (eg, propulsion system 140 , perception system 120 , and decision control system 130 ).
- the computing platform 150 can bring more possibilities for functional development of the braking system 135.
- computing platform 150 may control braking system 135 to avoid collision with an obstacle detected by perception system 120 based on input from decision control system 130.
- Computing platform 150 includes at least one processor 151 that can execute instructions 153 stored in a non-transitory computer-readable medium such as memory 152.
- computing platform 150 may also be a plurality of computing devices that control individual components or subsystems of vehicle 100 in a distributed manner.
- the processor 151 therein can be any conventional processor, such as a central processing unit (Central Process Unit, CPU).
- the processor 151 may also include a processor such as a graphic process unit (GPU), a field programmable gate array (FPGA), a system on chip (SOC), an application specific integrated chip ( application specific integrated circuit (ASIC) or their combination.
- FIG. 1 functionally illustrates a processor, memory, and other components, one of ordinary skill in the art will understand that the processor, computer, or memory may actually include multiple components that may or may not be stored within the same physical enclosure.
- processor, computer, or memory may be a hard drive or other storage medium located in a housing different from the computer.
- a reference to a processor or computer will be understood to include a reference to a collection of processors or computers or memories that may or may not operate in parallel.
- some components such as the steering component and the braking component, may each have their own processor that performs only the functions related to the component-specific functions. calculate.
- the processor may be located remotely from the vehicle and in wireless communication with the vehicle. In other aspects, some of the processes described herein are performed on a processor disposed within the vehicle and others are performed by a remote processor, including taking the steps necessary to perform a single maneuver.
- memory 152 may contain instructions 153, such as program logic.
- Instructions 153 are executable by processor 151 to perform various functions of vehicle 100 .
- Memory 152 may also contain additional instructions, including sending data to, receiving data from, interacting with, and/or controlling one or more of infotainment system 110 , perception system 120 , decision control system 130 , driver system 140 instructions.
- memory 152 may store data such as road maps, route information, vehicle location, direction, speed and other such vehicle data, as well as other information. This information may be used by vehicle 100 and computing platform 150 during operation of vehicle 100 in autonomous, semi-autonomous and/or manual modes.
- Figure 1 should not be understood as limiting the embodiments of the present application.
- one or more of these components described above may be installed separately or associated with vehicle 100 .
- memory 152 may exist partially or completely separate from vehicle 100 .
- the components described above may be communicatively coupled together in wired and/or wireless manners.
- the above-mentioned components are just examples. In actual applications, the components in each of the above-mentioned modules may be added, deleted, or re-divided according to actual needs.
- the above-mentioned vehicle 100 can be a passenger car, a commercial vehicle, a motorcycle, a special vehicle (such as a fire truck, an ambulance, a mining vehicle, a road construction vehicle, etc.), a rail vehicle, a ship, an aircraft, etc.
- a special vehicle such as a fire truck, an ambulance, a mining vehicle, a road construction vehicle, etc.
- a rail vehicle a ship, an aircraft, etc.
- Braking and driving are the core control functions of the vehicle, which are used to achieve longitudinal control of the vehicle to accelerate or decelerate the vehicle or maintain a certain speed.
- Figure 2 provides a schematic diagram of a brake-by-wire and electric drive system 200.
- the braking and electric drive system includes: brake caliper 201, friction disc 202, rear drive shaft 203, rear drive motor 204, brake fluid pipe 205, integrated booster 206, chassis communication line 207, front drive motor 208, front drive shaft 209, vehicle controller 210.
- the integrated booster 206 is the core of the braking system and integrates an electronic control unit (ECU) (not shown for clarity), pedal stroke sensor, brake master cylinder, motor, push rod mechanism, etc.
- ECU electronice control unit
- the brake pedal may be rigidly connected to an integrated booster 206
- the integrated booster 106 is connected to the brake caliper 101 through a brake fluid pipe 105 .
- the vehicle controller 210 is the core of the drive system. It communicates through the Controller Area Network (CAN) and is connected to the front drive motor 208 and the rear drive motor 204 respectively.
- the front drive motor 108 is connected to the wheels through the front drive shaft 209
- the rear drive motor 204 is connected to the wheel through the rear drive shaft 203.
- CAN Controller Area Network
- the driver steps on the electronic throttle, and the vehicle controller 210 collects the opening of the electronic throttle, calculates the torque instructions of the front and rear motors, and sends the drive motor control to the front drive motor 208 and the rear drive motor 204 through CAN. processor (MCU) (not shown for clarity).
- MCU CAN. processor
- the front drive motor 208 and the rear drive motor 204 generate torque and are connected to the wheels through the front drive shaft 109 and the rear drive shaft 103 to drive the wheels forward.
- the driver depresses the brake pedal, and the push rod mechanism of the integrated booster 106 generates displacement.
- the pedal stroke sensor detects the displacement of the push rod mechanism and sends the displacement signal to the ECU.
- the ECU calculates the boost pressure.
- the torque that the motor should generate is then converted into braking force by the transmission mechanism of the booster motor.
- the braking force and the push rod force generated by the brake pedal through the push rod mechanism act together on the brake master cylinder, and are converted into hydraulic pressure in the brake master cylinder.
- the brake fluid with hydraulic pressure acts through the brake fluid pipe 205 On the brake caliper 201. Braking is achieved by clamping the brake friction disc 202 .
- the vehicle controller 210 receives the driving command of the integrated booster 206, and after calculation, sends the modified driving torque to the front drive motor 108 and the rear drive motor 104 respectively.
- the coordination of braking and driving can also be realized by the electronic control unit of the drive motor controller and integrated booster 206 .
- the brake-by-wire system can also adopt other arrangements in the vehicle.
- a vehicle may have one drive motor (front-wheel drive or rear-wheel drive).
- the integrated booster 206 and the vehicle controller 210 may be arranged at other locations in the vehicle.
- the brake-by-wire system may also include more brake lines. Therefore, it should be noted that FIG. 2 is only a possible arrangement of the brake-by-wire and drive system provided by the embodiment of the present application, and should not be understood as a limitation of the embodiment of the present application.
- this application provides a solution for controlling vehicle braking when emergency braking occurs or ABS is activated.
- the energy recovery braking torque and friction braking torque are coordinated and adjusted to meet the changing braking demand torque, ensuring vehicle stability while also being able to carry out effective energy use. Recycle.
- Figure 3 shows a schematic diagram of a braking system provided by an embodiment of the present application. The following describes the system composition, connection relationships, integration methods, interface settings, control relationships, etc. of the braking system 300 with reference to FIG. 3 .
- the braking system 300 includes an intelligent pedal unit 310 and an intelligent braking unit 320 .
- the brake pedal 312 is coupled with the braking intention collection module 314, whereby the braking intention collection module 314 can collect the correlation of the driver's braking behavior according to the driver's actions on the brake pedal 312. information.
- the braking intention determination module 314 may include various solenoid valve drives, motor drives, and various signal processing and control output interfaces.
- the braking intention acquisition module 314 can receive measurement or detection signals from various sensors, such as environmental conditions, driver input, braking system status, etc., and control the braking characteristics of the braking system through calculation and judgment.
- the braking intention collection module 314 may be used to collect the speed and stroke of the driver's depressing of the brake pedal 312 collected currently and in several previous cycles, as well as the pressure information established thereby, etc.
- the intelligent braking unit 320 includes an electronic control unit 322, a brake assist module 324, and a wheel hydraulic control module 326.
- the electronic control unit 322 determines the energy recovery braking torque and friction braking used for braking according to the vehicle status information or control information from the braking intention acquisition module 314, the battery management control module 330, and the drive motor controller (MCU) 340. torque.
- the brake controller 322 may receive the upper limit value of the allowed charging power from the BMS 330, and the upper limit value of the allowed charging power may be determined according to the SOC status.
- the brake controller 322 may also receive the upper limit value of the motor's allowable power generation torque from the MCU 340.
- the brake controller 322 determines the maximum energy recovery braking torque. For example, the minimum of the torque corresponding to the charging power upper limit value and the power generation torque upper limit value is determined as the maximum energy recovery braking torque.
- Brake controller 322 may receive braking characteristics from braking intent acquisition module 314 . Braking characteristics may include, for example, speed, stroke, and pressure information established thereby, etc., from which the brake controller 322 may determine the braking demand torque of the wheel. On the one hand, if ABS is not enabled, the brake controller 322 may directly utilize the braking characteristics to generate the braking demand torque of the wheels.
- brake controller 322 does not use the braking demand torque determined based on the braking characteristics of pedal 312, but instead uses the braking demand torque provided by the ABS for each individual situation.
- the braking of the wheels requires torque, and the stability of the vehicle body is maintained through "point braking".
- the ABS may be integrated into the brake controller 322 or may be provided separately.
- the brake controller 322 may also divide the braking demand torque into energy recovery braking torque and friction braking torque, that is, the braking demand torque is equal to the sum of energy recovery braking torque and friction braking torque. and.
- the energy recovery braking torque can be sent to the MCU 340 by the brake controller 322, and the MCU 340 transmits the torque information to the corresponding drive motor 350 to implement energy recovery braking.
- the energy recovery braking torque response time of the drive motor is about 10ms.
- the brake controller 322 controls the brake assist module 324 and the wheel hydraulic pressure control module 326 based on the friction braking torque, and applies hydraulic pressure corresponding to the friction braking torque, thereby performing friction braking on each wheel 360 .
- the brake assist module 324 may include components such as a boost motor, a bidirectional boost cylinder, a boost control valve, and the like, and be coupled to the wheel hydraulic control module 326 to provide friction braking capabilities for each wheel.
- the wheel hydraulic control module 326 may include a wheel cylinder pressure increase valve and a wheel cylinder pressure relief valve for each wheel 360 .
- the integrated booster 320 increases the friction braking torque slowly by building up hydraulic pressure (eg, increases by 100 Bar in 150 ms), and decreases the friction braking torque by releasing pressure slightly faster (eg, decreases by 50 Bar in 10 ms).
- the energy recovery braking torque response time is about 10ms. Therefore, the response speed of regenerative braking is significantly faster than that of friction braking.
- the traditional solution cannot coordinate CRBS and ABS well, which may cause the vehicle to lose stability, unexpected longitudinal acceleration, reduced recovery energy, and the establishment of high hydraulic pressure in a short period of time may also lead to a reduction in the mechanical life of the booster.
- FIG. 4 shows a schematic flowchart of a process 400 for braking a vehicle provided by embodiments of the present application.
- Process 400 may be implemented by any one of the integrated booster 206 and vehicle controller 210 shown in Figure 2 and the brake controller 322 and MCU 340 shown in Figure 3 .
- process 400 is described in connection with FIG. 3 .
- the brake controller 322 obtains the maximum charging power allowed by the current battery from the BMS 330, and obtains the maximum generated torque of the current motor from the drive motor controller 340.
- the brake controller 322 calculates the current drive motor energy recovery torque upper limit based on the maximum charging power and the maximum power generation torque obtained from the BMS 330 and the MCU 340, respectively.
- brake control 322 determines whether emergency braking is intended.
- the brake controller 322 comprehensively calculates the driver's braking intention based on information such as the driver's depression of the brake pedal and the pressure established in the integrated booster collected at the current and previous cycles.
- the brake controller 322 may obtain the speed, stroke and pressure information of the driver's depression of the brake pedal 312 from the braking intention collection module 314 to determine whether there is an emergency braking intention. For example, the brake controller 322 may determine that the brake pedal 312 is pressed quickly based on the depression pressure being large enough, or based on the increase in pedal stroke within a preset time being greater than a preset value, or the pedal stroke being greater than or equal to a certain value. A preset threshold determines whether the driver is braking the vehicle in an emergency.
- the electronic control unit 322 may also determine that an emergency braking intention exists in response to an indication received by the electronic control unit 322 that the AEB function is triggered. Additionally, if the vehicle's ABS is enabled, the electronic control unit 322 may also determine that an emergency braking intention exists. It should be understood that whether there is an emergency braking intention can also be determined based on other information, which is not limited in this application.
- AEB automatic emergency braking
- process 400 proceeds to block 407 where brake controller 322 executes a brake energy recovery strategy.
- the braking energy recovery strategy can use the recovery strategy of CRBS, such as a filter-based method, in which the braking demand torque is filtered and divided into high-frequency components and low-frequency components, which are used as energy recovery braking torque and friction braking torque respectively. This application places no restrictions on the braking energy recovery strategy.
- process 400 proceeds to block 408 where brake controller 322 executes an entry process for coordinated management of ABS and energy recovery.
- the entry process By executing the entry process, the braking demand torque of each wheel can be optimally distributed between regenerative braking and friction braking in advance to prepare for possible ABS braking requirements.
- ABS Once ABS is activated, it can flexibly adjust the energy recovery braking torque and friction braking torque, and can quickly respond to and meet the large fluctuations in ABS braking needs.
- the entry process 408 will be described below with reference to Figures 6 and 7, and will not be described in detail here.
- the brake controller 322 determines whether ABS is enabled. If ABS is not enabled, process 400 proceeds to block 414 where brake controller 322 determines whether there is an intent to exit emergency braking.
- Exiting the emergency braking intention means that the brake controller 322 recognizes that the driver's braking intention is declining and is about to exit ABS or even exit braking.
- the basis for the judgment includes judging that the driver releases the pedal quickly or judging that the driver releases the pedal. For example, the reduction of the pedal stroke within the preset time is greater than the preset value, or the pedal stroke is smaller than the preset stroke.
- brake controller 322 may also determine that the vehicle exits the emergency braking state based on receiving an indication that automatic emergency braking has ended.
- the brake controller 322 executes an ABS and energy recovery coordinated management exit process 416 .
- the entry process will be described below with reference to Figures 8 and 9, which will not be described in detail here.
- process 400 proceeds to block 412 where brake controller 322 performs ABS and energy recovery co-management.
- the brake controller 322 flexibly allocates the braking demand torque to the drive motor and friction brake according to the state of the vehicle and the traffic environment to achieve collaborative braking.
- the ABS and energy recovery collaborative management 412 will be described below with reference to FIGS. 10 to 15 , which will not be described in detail here.
- the process 400 may proceed to block 416 to execute the exit process.
- the execution results of the brake controller 322 entering the process 408 , ABS and energy recovery collaborative management 412 , and exiting the process 416 may include energy recovery braking torque and friction braking torque for each wheel.
- the brake controller 322 may further process the regenerative braking torque and friction braking torque derived from these processes to the torque actually performed by the drive motor and friction disc.
- FIG. 5 shows a schematic flowchart of another process 500 for performing braking of a vehicle provided by embodiments of the present application.
- the brake controller 322 determines the energy recovery torque of the drive motor according to the energy recovery braking torque of the wheel and the energy recovery torque limit, whichever is less. Specifically, for two wheels driven by the same drive motor, the brake controller 322 can synthesize an energy recovery torque by taking the minimum value, the average value, or the maximum value, and then compare the combined value with the torque obtained in block 404 Compare the upper limit of the energy recovery torque and take the smaller value as the energy recovery torque of the drive motor.
- the recuperation torque can also be synthesized from the recuperation braking torques of all wheels.
- the brake controller 322 sends the determined energy recovery torque of the drive motor to the MCU 340, for example, through a dedicated high-speed communication line, whereby the drive motor 350 can brake according to the received energy recovery torque. .
- the brake controller 322 subtracts the energy recovery torque of the drive motor from the braking demand torque of each wheel to obtain the friction demand torque of each wheel and sends it to the friction execution unit (e.g., the brake boost module 324 and the wheel Hydraulic control module 326) to achieve friction braking.
- the friction braking torque can be used to reduce the energy recuperation torque that is not executed because it may exceed the upper limit of the energy regeneration torque to ensure that the sum of the wheel braking torques is equal to the braking demand torque.
- FIG. 6 shows a schematic graph of the braking torque changing with time during the entry process
- FIG. 7 shows a schematic flow chart of the entry process of coordinated control of ABS and energy recovery provided by embodiments of the present application.
- the driver releases the accelerator and has not yet stepped on the brake pedal.
- the vehicle is in the middle of the coasting process and executes the coasting energy recovery strategy.
- the driver's braking demand torque is basically consistent with the energy recovery demand torque, that is, braking is basically achieved through energy recovery, and the braking torque does not fluctuate much.
- the driver steps on the brake pedal, the vehicle is in the braking energy recovery process, and the braking energy recovery strategy is executed accordingly.
- the driver's braking demand torque is basically consistent with the energy regeneration demand torque, and the energy regeneration braking torque is increased to match the driver's braking demand torque.
- the entry sign of this stage is the detection of the driver's intention of emergency braking.
- the basis for judgment includes: the driver depresses the pedal quickly, the driver depresses the pedal deeply, or receives an instruction from AEB braking. At this time, before the driver's braking demand torque reaches the upper limit of the energy regeneration torque, the energy regeneration braking torque is increased to match the braking demand torque.
- the energy recovery torque can be reduced to a preset value while continuing to increase the friction braking torque to compensate, i.e. the driver braking demand torque is equal to the friction braking torque and energy The sum of regenerated braking torque.
- the preset value of the energy recuperation torque at the end of the stage is determined in the following manner: the preset value of the energy recuperation torque is within an interval of the upper limit of the energy recuperation torque, for example, the upper limit of the energy recuperation torque.
- the preset value is within a range of the driver's braking demand torque, for example, driver's braking demand torque*40% (Can be calibrated) ⁇ Energy recovery torque ⁇ Driver braking demand torque*60% (can be calibrated).
- the energy recovery torque can take the maximum value in the common interval or any other value (can be calibrated).
- Figure 7 shows the actions performed at the various stages of Figure 6.
- the brake controller 322 increases the regenerative braking torque.
- the brake controller 322 determines whether the regenerative braking torque has reached the regenerative upper limit. If it is not reached, return to block 702 and continue to increase the energy recovery braking torque. If the upper limit has been reached, at block 706, the friction braking torque is increased.
- conditions for entering the end of process 408 include ABS being enabled 410 or a determination to exit emergency braking. If ABS is enabled, the brake controller 322 will execute the ABS and energy recovery coordination management process 412. If emergency braking is exited, the brake controller 322 will execute the ABS and energy recovery coordination management process 416. Next, the exit process 416 is described with reference to FIGS. 8 and 9 .
- the driver in response to recognizing exiting emergency braking, the driver reduces the braking demand torque at a relatively large rate during the stage of reducing braking intention, such as when releasing the pedal quickly or for a long time.
- the energy recovery torque remains unchanged, and the friction braking torque is gradually reduced according to the change in braking demand torque. This process continues until the friction braking torque decreases to near 0.
- the driver In the braking energy recovery stage, the driver still depresses the brake pedal and the vehicle is in the braking energy recovery process and implements the braking energy recovery strategy.
- the driver In the coasting energy recovery phase, the driver has released the brake pedal but has not yet stepped on the accelerator pedal.
- the vehicle is in the process of coasting and the coasting energy recovery strategy is implemented.
- Figure 9 shows the actions performed at the various stages of Figure 8.
- the brake controller 322 increases the regenerative braking torque.
- the brake controller 322 reduces the friction braking torque while maintaining the regenerative braking torque substantially unchanged.
- Process 1000 may be implemented by any one of the integrated booster 206 and vehicle controller 210 shown in Figure 2 and the brake controller 322 and MCU 340 shown in Figure 3 .
- process 1000 is described in conjunction with FIG. 3 .
- the brake controller 322 obtains the braking demand torque of the wheels.
- the ABS can generate braking demand torque for each wheel of the vehicle without using braking torque generated by brake pedal pressure. For example, it can be determined whether the wheels are locked based on the vehicle speed and wheel speed. If the wheels are locked and it is determined that a sideslip has occurred or is about to occur, ABS can be activated. In this case, brake controller 322 obtains brake demand torque from the ABS.
- the brake controller 322 may also obtain the braking demand torque from other sources, such as an automatic assisted driving system, remote control commands received via the network, etc., which is not limited by this application.
- the brake controller 322 determines a change in regenerative braking torque and a friction braking torque change of the wheel based on a change in braking demand torque of the wheel, where the change in braking demand torque is energy The sum of the change in regenerative braking torque and the change in friction braking torque.
- the brake controller allocates the change in braking demand torque to the energy regeneration braking torque and the friction braking regeneration torque.
- the type of coordinated control strategy that each wheel is in can be determined, and the change in braking demand torque is allocated according to this strategy.
- the single-wheel ABS and energy recovery coordinated control strategy type can include three modes: energy recovery priority, friction braking priority, and coordinated adjustment.
- the coordinated control type of a single wheel can be determined based on vehicle speed, wheel speed and road adhesion coefficient. It should be understood that these patterns are illustrative only and other strategies may be used.
- FIG. 11 shows a schematic flowchart of a process 1100 of coordinated control of ABS and energy recovery provided by an embodiment of the present application.
- the brake controller 322 determines whether the rate of change of brake demand torque is greater than or equal to a threshold rate of change. If so, then at block 1102, it is determined to use the coordinated adjustment mode.
- the change rate may be the absolute value of the change amount (increase or decrease) of the braking demand torque over two or more control periods.
- the braking torque required by ABS is expressed as "point braking", that is, large braking torque is not required all the time and braking torque is applied intermittently.
- point braking the torque response of the drive motor is about 10ms
- the integrated booster uses a liquid outlet valve to relieve pressure of 50Bar in 10ms, energy recovery actuator and friction brake actuator The ability to reduce braking torque is balanced and therefore well coordinated.
- both the energy recovery actuator and the friction brake actuator operate at full strength to cooperate with the rapid increase in braking torque.
- the ratio between the change amount of the energy recovery braking torque and the change amount of the friction braking torque may be a first preset ratio, and the brake actuator 322 may determine the energy recovery based on the first preset ratio. Specifies the amount of change in torque and friction braking torque.
- the rate of change of brake demand torque is less than the threshold rate of change, then at block 1103 it is determined whether the wheel and wheel speed are greater than or equal to the corresponding threshold. If both are yes, then at block 1104, it is determined to adopt the energy recovery priority mode. For example, if the vehicle speed and wheel speed are both greater than 70km/h (can be calibrated), the corresponding drive motor speed is relatively high and the counter electromotive force is relatively large. At this time, the voltage control amount output by the control inverter of the drive motor can be adjusted within a large range, which can quickly increase and decrease the energy recovery torque. Therefore, energy recovery priority mode is adopted.
- the ratio between the change amount of the energy recovery braking torque and the change amount of the friction braking torque may be a second preset ratio, and the second preset ratio is greater than the first preset ratio of the coordinated adjustment mode.
- the energy recovery braking torque change weight 80% (can be calibrated)
- the friction braking torque change weight 20% (can be calibrated).
- braking is performed.
- regenerative braking and friction braking may be performed according to process 500 described with reference to FIG. 5 .
- coordinated control of low vehicle speeds is also provided.
- the energy recovery torque can still be maintained.
- the bidirectional DC converter that drives the motor still charges the power battery when the motor's back electromotive force is very low, and even allows the power battery to discharge to maintain the energy recovery torque.
- Figure 12 shows a schematic curve diagram of the coordinated control process of ABS and energy recovery when parking is about to stop according to an embodiment of the present application.
- the driver's braking torque demand remains basically unchanged.
- the driver's required braking torque is evenly distributed to the energy recovery braking torque and the friction braking torque for execution.
- the braking torque required by the driver is basically implemented through friction braking torque.
- the embodiments of the present application can maintain good stability of the vehicle body when the vehicle is about to stop.
- Figure 13 shows a schematic curve diagram of the coordinated control process of ABS and energy recovery on a high-adhesion road surface according to an embodiment of the present application.
- ABS due to the difference in vehicle speed and wheel speed, ABS is enabled and provides total braking torque, that is, the torque required for single-wheel braking.
- the coordinated adjustment mode is adopted.
- the energy recovery priority mode is adopted.
- the friction braking priority mode is adopted.
- the vehicle speed is so low that it is about to stop, it enters the energy recovery end stage until it stops.
- Figure 14 shows a schematic curve diagram of the coordinated control process of ABS and energy recovery on a low friction road surface according to an embodiment of the present application.
- ABS is enabled and provides total braking torque, that is, the single wheel braking demand torque.
- the friction braking priority mode is not adopted, but the coordinated adjustment mode is adopted. This is different from the example of Figure 13.
- FIG. 15 shows a schematic graph of exiting the ABS process midway during braking on a high-adhesion road surface according to an embodiment of the present application.
- Figure 16 shows a schematic diagram of another braking system 1600 provided by an embodiment of the present application.
- the drive motor controller 340 implements the ABS and energy recovery coordinated control process according to the embodiment of the present application.
- the battery management controller BMS 330 can provide the energy recovery power upper limit to the drive motor controller.
- the drive motor controller 340 determines the regenerative braking torque and the friction braking torque by performing the process described with reference to FIGS. 4 to 15 .
- the drive motor controller 340 controls the motor 350 to execute the determined regenerative braking torque.
- the drive motor controller sends the friction braking torque to the brake controller 322, and the brake controller 322 controls the braking unit 320 to perform the determined friction braking torque, for example, using a brake booster module 324 and wheel hydraulic control module 326 apply brake hydraulic pressure to generate friction braking torque.
- Figure 17 shows a schematic diagram of yet another braking system 1700 provided by an embodiment of the present application.
- the whole machine controller 210 implements the ABS and energy recovery coordinated control process according to the embodiment of the present application.
- the whole machine controller 210 can use a high computing power VCU, with the high computing power VCU as the core, and use high-speed communication lines to connect various actuators, including the brake actuator 322 and the drive motor controller 340.
- the whole machine controller 210 can receive the energy recovery power upper limit from the battery management controller BMS 330 and determine the energy recovery braking torque and friction braking torque.
- the whole machine controller 330 can send the corresponding execution instructions to the corresponding actuators through dedicated high-speed communication, including sending the friction braking torque to the brake controller 322, and the brake controller 322 controls the braking unit 320 to execute all the commands. Determined friction braking torque.
- the whole machine controller 210 also sends the energy recovery braking torque to the drive motor controller 340, and the motor 350 executes the energy recovery braking torque.
- FIG 18 shows a schematic block diagram of a braking device 1800 according to an embodiment of the present application.
- the braking device 1800 may be implemented in the vehicle's intelligent brake controller 322 , the vehicle's drive motor controller 340 , or the vehicle's entire vehicle controller 210 .
- the braking device 1800 includes a braking demand acquisition unit 1810 .
- the braking demand acquisition unit 1810 is configured to acquire the braking demand torque of the wheel.
- the braking device also includes a control unit 1820 .
- the control unit 1820 is configured to determine a change amount of the energy recuperation braking torque and a change amount of the friction braking torque of the wheel based on the change amount of the braking demand torque of the wheel, wherein the change amount of the braking demand torque is the amount of change of the energy regeneration braking torque. The sum of the change in dynamic torque and the change in friction braking torque.
- control unit 1820 may be further configured to, if the change rate of the braking demand torque is greater than or equal to the threshold change rate, based on a third change between the change amount of the energy recovery braking torque and the change amount of the friction braking torque.
- a preset ratio that determines the amount of change in regenerative braking torque and the amount of change in friction braking torque.
- control unit 1820 may be further configured to, if the vehicle speed is greater than or equal to the threshold vehicle speed and the wheel speed is greater than or equal to the threshold wheel speed, between the change amount of the energy recovery braking torque and the change amount of the friction braking torque.
- the second preset ratio determines the change amount of energy recuperation braking torque and the change amount of friction braking torque, the second preset ratio is the first preset ratio.
- control unit 1820 may be further configured to, if the road adhesion coefficient is greater than or equal to the threshold coefficient, based on a third preset ratio between the change amount of the energy recovery braking torque and the change amount of the friction braking torque, The change amount of energy recuperation braking torque and the change amount of friction braking torque are determined, and the third preset ratio is smaller than the first preset ratio.
- the brake demand acquisition unit 1810 may be further configured to obtain brake demand torque from an anti-lock braking system (ABS).
- ABS anti-lock braking system
- the control unit 1820 may also be configured to make the regenerative braking torque of the wheels less than the upper limit of the regenerative torque before the ABS is activated.
- control unit 1820 may be further configured to, in response to emergency braking of the vehicle, increase the friction braking torque of the wheel when the energy recovery braking torque of the wheel has reached an upper limit value.
- the control unit 1820 may be further configured to reduce the regenerative braking torque from the upper limit value and continue to increase the friction braking torque in response to a reduction in the increase in braking demand torque of the wheel, wherein the regenerative braking torque and The sum of the friction braking torques is the braking demand torque.
- the upper limit value is determined based on the current maximum charging power of the vehicle battery and the current maximum regenerative torque of the electric machine.
- control unit 1820 may also be configured to reduce friction braking torque in response to the vehicle exiting the emergency braking state. In some embodiments, the control unit 1820 may be further configured to control braking or coasting of the vehicle by controlling the regenerative braking torque after the friction braking torque is reduced to zero.
- control unit 1820 may be further configured to respond to a decrease in the stroke of the brake pedal being greater than a preset value within a preset time, a stroke of the brake pedal being less than a preset stroke, or receiving The indication to the end of automatic emergency braking confirms that the vehicle exits the emergency braking state.
- FIG 19 shows a schematic block diagram of another braking device 1900 according to an embodiment of the present application.
- the braking device 1900 may be implemented in the vehicle's intelligent brake controller 322 , the vehicle's drive motor controller 340 , or the vehicle's entire vehicle controller 210 .
- Braking device 1900 includes a control unit 1920 .
- the control unit 1920 is configured to increase the friction braking torque of the wheel when the energy recovery braking torque of the wheel has reached an upper limit value in response to emergency braking of the vehicle.
- the control unit 1920 is further configured to reduce the regenerative braking torque from the upper limit value and continue to increase the friction braking torque in response to the reduction in the increase in braking demand torque of the wheel, wherein the regenerative braking torque and friction The sum of the braking torques is the braking demand torque.
- control unit 1920 may be configured to determine an upper limit value of regenerative braking torque based on the current maximum charging power of the vehicle battery and the current maximum regenerative torque of the motor.
- control unit 1920 may be further configured to respond to an increase in the stroke of the brake pedal being greater than a preset value within a preset time, the stroke of the brake pedal being greater than or equal to the preset stroke, or receiving an activation
- the indication of automatic emergency braking determines that the vehicle has undergone emergency braking.
- control unit 1920 may be further configured to determine the regenerative braking torque performed by the electric machine based on the regenerative braking torque of one wheel and the regenerative braking torque of the other wheel.
- the control unit 1920 may also be configured to determine a friction braking torque for execution by the friction disc based on the braking demand torque of the wheel and the regenerative braking torque executed by the electric motor.
- control unit 1920 may be further configured to determine the preset torque based on at least one of an upper limit value of regenerative braking torque and a braking demand torque, and reduce the regenerative braking torque to the preset torque. Assume torque.
- control unit 1920 may also be configured to reduce friction braking torque in response to the vehicle exiting emergency braking. In some embodiments, the control unit 1920 may be further configured to control braking or coasting of the vehicle by controlling the regenerative braking torque after the friction braking torque is reduced to zero.
- control unit 1920 may be further configured to determine that the vehicle exits the emergency braking state in response to the brake pedal, the stroke of the brake pedal being less than the preset stroke, or receiving an indication of the end of automatic emergency braking.
- the device 1900 may further include a braking demand acquisition unit.
- the brake demand acquisition unit is configured to acquire the brake demand torque of the wheel from the anti-lock braking system (ABS) of the vehicle in response to activation of the ABS.
- the control unit 1920 may also be configured to determine a change amount of the energy recuperation braking torque and a change amount of the friction braking torque of the wheel based on the change amount of the braking demand torque of the wheel, where the change amount of the braking demand torque is the amount of change of the energy recuperation braking torque. The sum of the change in dynamic torque and the change in friction braking torque.
- control unit 1920 may be further configured to, if the change rate of the braking demand torque is greater than or equal to the threshold change rate, based on a third change between the change amount of the energy recovery braking torque and the change amount of the friction braking torque.
- a preset ratio that determines the amount of change in regenerative braking torque and the amount of change in friction braking torque.
- control unit 1920 may also be configured to, if the vehicle speed is greater than or equal to the threshold vehicle speed and the wheel speed is greater than or equal to the threshold wheel speed, between the change amount of the energy recovery braking torque and the change amount of the friction braking torque.
- the second preset ratio determines the change amount of the energy recovery braking torque and the change amount of the friction braking torque, and the second preset ratio is greater than the first preset ratio.
- control unit 1920 may be further configured to, if the road adhesion coefficient is greater than or equal to the threshold coefficient, based on a third preset ratio between the change amount of the energy recovery braking torque and the change amount of the friction braking torque, The change amount of energy recuperation braking torque and the change amount of friction braking torque are determined, and the third preset ratio is smaller than the first preset ratio.
- the friction brake actuator and the energy recovery actuator can be controlled in a coordinated manner, resulting in faster control response, better control effect, and enhanced vehicle stability compared to traditional solutions.
- the friction brake demand torque and the energy recovery demand torque are managed simultaneously when the driver's emergency braking intention is detected.
- the friction braking demand torque and energy recovery torque are exited. Based on this method, it not only ensures that the demand braking torque is equal to the demand friction braking torque plus the demand energy recovery braking torque, but also enables the actual friction braking torque and energy recovery braking torque to keep up with the demand and play a good role.
- the characteristics of different actuators prevent the actual braking torque from fluctuating violently during the process of entering and exiting ABS, deviating from the braking torque required by the driver, and avoiding unexpected deceleration and vehicle instability.
- a dedicated high-speed communication line can be directly set up between the drive motor controller and the brake controller, thereby reducing the time delay of the drive motor torque transmission and avoiding control problems caused by too slow torque response of the drive motor. The effect worsens and the vehicle loses stability.
- the DC converter that drives the motor controller pumps up the voltage and still charges the power battery, or even allows the power battery to discharge to maintain the output of energy recovery torque. This can maintain the stability of the energy recuperation torque and improve the stability of the vehicle at low speeds. It can also prevent the friction braking torque from rising sharply at low speeds and establish high pressure inside the integrated booster, which prolongs the time of the integrated booster. Mechanical life of the device.
- a computer program product may include a computer-readable storage medium having thereon computer-readable program instructions for performing various aspects of the present application.
- Computer-readable storage media may be tangible devices that can retain and store instructions for use by an instruction execution device.
- the computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or Flash memory), Static Random Access Memory (SRAM), Compact Disk Read Only Memory (CD-ROM), Digital Versatile Disk (DVD), Memory Stick, Floppy Disk, Mechanical Coding Device, such as a printer with instructions stored on it.
- RAM random access memory
- ROM read-only memory
- EPROM erasable programmable read-only memory
- Flash memory Static Random Access Memory
- CD-ROM Compact Disk Read Only Memory
- DVD Digital Versatile Disk
- Memory Stick
- Computer-readable storage media are not to be construed as transient signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or through electrical wires. transmitted electrical signals.
- Computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to various computing/processing devices, or to an external computer or external storage device over a network, such as the Internet, a local area network, a wide area network, and/or a wireless network.
- the network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and/or edge servers.
- a network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage on a computer-readable storage medium in the respective computing/processing device .
- Computer program instructions for performing the operations of this application may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or instructions in one or more programming languages.
- the computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server implement.
- the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (such as an Internet service provider through the Internet). connect).
- LAN local area network
- WAN wide area network
- an external computer such as an Internet service provider through the Internet. connect
- an electronic circuit such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA)
- the electronic circuit can Computer readable program instructions are executed to implement various aspects of the application.
- These computer-readable program instructions may be provided to a processing unit of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, thereby producing a machine such that the instructions, when executed by a processing unit of the computer or other programmable data processing apparatus, , resulting in an apparatus that implements the functions/actions specified in one or more blocks in the flowchart and/or block diagram.
- These computer-readable program instructions can also be stored in a computer-readable storage medium. These instructions cause the computer, programmable data processing device and/or other equipment to work in a specific manner. Therefore, the computer-readable medium storing the instructions includes An article of manufacture that includes instructions that implement aspects of the functions/acts specified in one or more blocks of the flowcharts and/or block diagrams.
- Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other equipment, causing a series of operating steps to be performed on the computer, other programmable data processing apparatus, or other equipment to produce a computer-implemented process , thereby causing instructions executed on a computer, other programmable data processing apparatus, or other equipment to implement the functions/actions specified in one or more blocks in the flowcharts and/or block diagrams.
- each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions that contains one or more executable functions for implementing the specified logical functions instruction.
- the functions noted in the block may occur out of the order noted in the figures. For example, two consecutive blocks may actually execute substantially in parallel, or they may sometimes execute in the reverse order, depending on the functionality involved.
- each block of the block diagram and/or flowchart illustration, and combinations of blocks in the block diagram and/or flowchart illustration can be implemented by special purpose hardware-based systems that perform the specified functions or acts. , or can be implemented using a combination of specialized hardware and computer instructions.
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Abstract
Description
Claims (28)
- 一种制动方法,包括:获取车轮的制动需求扭矩;以及基于所述车轮的所述制动需求扭矩的变化量,确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩变化量,其中所述制动需求扭矩的变化量为所述能量回收制动扭矩的变化量和摩擦制动扭矩的变化量之和。
- 根据权利要求1所述的方法,其中确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩的变化量包括:如果所述制动需求扭矩的变化率大于或等于阈值变化率,基于所述能量回收制动扭矩的变化量和摩擦制动扭矩的变化量之间的第一预设比率,确定所述能量回收制动扭矩的变化量和所述摩擦制动扭矩的变化量。
- 根据权利要求1或2所述的方法,其中确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩的变化量包括:如果车速大于或等于阈值车速并且轮速大于或等于阈值轮速,基于所述能量回收制动扭矩的变化量和摩擦制动扭矩的变化量之间的第二预设比率,确定所述能量回收制动扭矩的变化量和所述摩擦制动扭矩的变化量,所述第二预设比率大于所述第一预设比率。
- 根据权利要求1至3中任一项所述的方法,其中确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩的变化量包括:如果路面附着系数大于或等于阈值系数,基于所述能量回收制动扭矩的变化量和摩擦制动扭矩的变化量之间的第三预设比率,确定所述能量回收制动扭矩的变化量和所述摩擦制动扭矩的变化量,所述第三预设比率小于所述第一预设比率。
- 根据权利要求1所述的方法,其中,获取车轮的制动需求扭矩包括从防抱死系统(ABS)获取所述制动需求扭矩,所述方法还包括:在所述ABS启用之前,使所述车轮的能量回收制动扭矩小于能量回收扭矩的上限值。
- 根据权利要求5所述的方法,其中,使所述车轮的能量回收制动扭矩小于能量回收扭矩的上限值包括:响应于车辆的紧急制动,在所述车轮的所述能量回收制动扭矩已达到上限值的情况下,增加所述车轮的所述摩擦制动扭矩;以及响应于所述车轮的制动需求扭矩的增速的减小,将所述能量回收制动扭矩从所述上限值减小并且继续增加所述摩擦制动扭矩,其中所述能量回收制动扭矩和所述摩擦制动扭矩之和为所述制动需求扭矩。
- 根据权利要求5所述的方法,其中所述上限值基于车辆电池的当前最大充电功率和电机的当前最大回收扭矩而确定。
- 根据权利要求1至7中任一项所述的方法,还包括:响应于车辆退出紧急制动状态,减小所述摩擦制动扭矩。
- 根据权利要求8所述的方法,还包括:在所述摩擦制动扭矩减小到零后,通过控制能量回收制动扭矩来控制所述车辆的制动或滑行。
- 根据权利要求8或9所述的方法,还包括响应于制动踏板的行程在预设时间内的减 小量大于预设值、制动踏板的行程小于预设行程或者接收到自动紧急刹车结束的指示,确定所述车辆退出紧急制动状态。
- 一种制动方法,包括:响应于车辆的紧急制动,在车轮的能量回收制动扭矩已达到上限值的情况下,增加所述车轮的摩擦制动扭矩;以及响应于所述车轮的制动需求扭矩的增速的减小,将所述能量回收制动扭矩从所述上限值减小并且继续增加所述摩擦制动扭矩,其中所述能量回收制动扭矩和所述摩擦制动扭矩之和为所述制动需求扭矩。
- 根据权利要求11所述的方法,还包括:基于车辆电池的当前最大充电功率和电机的当前最大回收扭矩,确定所述能量回收制动扭矩的所述上限值。
- 根据权利要求11或12所述的方法,还包括响应于制动踏板的行程在预设时间内的增加量大于预设值、制动踏板的行程大于或等于预设行程,或者接收到启用自动紧急刹车的指示确定所述车辆发生紧急制动。
- 根据权利要求11至13中任一项所述的方法,其中,还包括:基于所述车轮的所述能量回收制动扭矩和另一车轮的能量回收制动扭矩,确定由电机执行的能量回收制动扭矩;以及基于所述车轮的制动需求扭矩和所述由电机执行的能量回收制动扭矩,确定所述摩擦制动扭矩,用于由摩擦盘执行。
- 根据权利要求11至14中任一项所述的方法,其中,减小所述能量回收制动扭矩包括:将所述能量回收制动扭矩减小到预设扭矩,所述预设扭矩基于所述能量回收制动扭的上限值和所述制动需求扭矩中的至少一个来确定。
- 根据权利要求11至15中任一项所述的方法,还包括:响应于车辆退出紧急制动减小所述摩擦制动扭矩。
- 根据权利要求16所述的方法,还包括:在所述摩擦制动扭矩减小到零后,通过控制能量回收制动扭矩来控制所述车辆的制动或滑行。
- 根据权利要求16或17所述的方法,还包括:响应于制动踏板的行程在预设时间内的减小量大于预设值、制动踏板的行程小于预设行程、或者接收到自动紧急刹车结束的指示,确定所述车辆退出紧急制动状态。
- 根据权利要求11所述的方法,还包括,响应于所述车辆的防抱死系统(ABS)的启用:从所述ABS获取所述车轮的制动需求扭矩;以及基于所述车轮的所述制动需求扭矩的变化量,确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩变化量,其中所述制动需求扭矩的变化量为所述能量回收制动扭矩的变化量和摩擦制动扭矩的变化量之和。
- 根据权利要求19所述的方法,其中确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩的变化量包括:如果所述制动需求扭矩的变化率大于或等于阈值变化率,基于所述能量回收制动扭矩的 变化量和摩擦制动扭矩的变化量之间的第一预设比率,确定所述能量回收制动扭矩的变化量和所述摩擦制动扭矩的变化量。
- 根据权利要求19或20所述的方法,其中确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩的变化量包括:如果车速大于或等于阈值车速并且轮速大于或等于阈值轮速,基于所述能量回收制动扭矩的变化量和摩擦制动扭矩的变化量之间的第二预设比率,确定所述能量回收制动扭矩的变化量和所述摩擦制动扭矩的变化量,所述第二预设比率大于所述第一预设比率。
- 根据权利要求19至21中任一项所述的方法,其中确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩的变化量包括:如果路面附着系数大于或等于阈值系数,基于所述能量回收制动扭矩的变化量和摩擦制动扭矩的变化量之间的第三预设比率,确定所述能量回收制动扭矩的变化量和所述摩擦制动扭矩的变化量,所述第三预设比率小于所述第一预设比率。
- 一种电子设备,包括:至少一个处理单元;至少一个存储器,所述至少一个存储器被耦合到所述至少一个处理单元并且存储用于由所述至少一个处理单元执行的指令,所述指令当由所述至少一个处理单元执行时,使得所述设备执行根据权利要求1至10或权利要求11至22中任一项所述的方法。
- 一种制动装置,包括:制动需求获取单元,被配置为获取车轮的制动需求扭矩;以及控制单元,被配置为基于所述车轮的所述制动需求扭矩的变化量,确定所述车轮的能量回收制动扭矩的变化量和摩擦制动扭矩变化量,其中所述制动需求扭矩的变化量为所述能量回收制动扭矩的变化量和摩擦制动扭矩的变化量之和。
- 一种制动装置,包括:控制单元,被配置为响应于车辆的紧急制动,在车轮的能量回收制动扭矩已达到上限值的情况下增加所述车轮的摩擦制动扭矩;所述控制单元还被配置为响应于所述车轮的制动需求扭矩的增速的减小,将所述能量回收制动扭矩从所述上限值减小并且继续增加所述摩擦制动扭矩,其中所述能量回收制动扭矩和所述摩擦制动扭矩之和为所述制动需求扭矩。
- 一种车辆,包括根据权利要求24或25中任一项所述的装置。
- 一种计算机可读存储介质,其上存储有计算机程序,所述计算机程序在被处理器执行时实现根据权利要求1至10或权利要求11至22中任一项所述的方法。
- 一种计算机程序产品,包括计算机可执行指令,其中所述计算机可执行指令在被处理器执行时实现执行根据权利要求1至10或权利要求11至22中任一项所述的方法。
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| CN202510935757.8A CN120942020A (zh) | 2022-06-30 | 2022-06-30 | 制动方法、装置、电子设备、车辆和介质 |
| CN202280008348.8A CN117642307B (zh) | 2022-06-30 | 2022-06-30 | 制动方法、装置、电子设备、车辆和介质 |
| PCT/CN2022/103153 WO2024000524A1 (zh) | 2022-06-30 | 2022-06-30 | 制动方法、装置、电子设备、车辆和介质 |
| EP22948626.1A EP4530116A4 (en) | 2022-06-30 | 2022-06-30 | BRAKING METHOD AND APPARATUS, ELECTRONIC DEVICE, VEHICLE AND SUPPORT |
| US19/003,465 US20250135900A1 (en) | 2022-06-30 | 2024-12-27 | Braking method and apparatus, electronic device, vehicle, and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2022/103153 WO2024000524A1 (zh) | 2022-06-30 | 2022-06-30 | 制动方法、装置、电子设备、车辆和介质 |
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| US19/003,465 Continuation US20250135900A1 (en) | 2022-06-30 | 2024-12-27 | Braking method and apparatus, electronic device, vehicle, and medium |
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| WO2024000524A1 true WO2024000524A1 (zh) | 2024-01-04 |
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| PCT/CN2022/103153 Ceased WO2024000524A1 (zh) | 2022-06-30 | 2022-06-30 | 制动方法、装置、电子设备、车辆和介质 |
Country Status (4)
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|---|---|
| US (1) | US20250135900A1 (zh) |
| EP (1) | EP4530116A4 (zh) |
| CN (2) | CN117642307B (zh) |
| WO (1) | WO2024000524A1 (zh) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118163762A (zh) * | 2024-05-16 | 2024-06-11 | 盛瑞传动股份有限公司 | 车辆控制方法、装置、电子设备以及存储介质 |
| CN119319831A (zh) * | 2024-12-19 | 2025-01-17 | 张家港长城汽车研发有限公司 | 一种控制车辆制动系统的方法、装置、车辆和存储介质 |
| CN120096342A (zh) * | 2025-02-28 | 2025-06-06 | 岚图汽车科技有限公司 | 车辆制动控制方法及系统 |
| CN120588962A (zh) * | 2025-08-08 | 2025-09-05 | 万向钱潮股份公司 | 一种线控制动助力器电机控制模式切换方法、系统和设备 |
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| US20260084541A1 (en) * | 2024-09-25 | 2026-03-26 | GM Global Technology Operations LLC | Blended vehicle brake systems and control logic with friction brake burnish learning and compensation |
| CN121019289B (zh) * | 2025-10-30 | 2026-01-27 | 盐城师范学院 | 基于驾驶风格的纯电动汽车制动能量回收控制系统 |
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| CN120096342A (zh) * | 2025-02-28 | 2025-06-06 | 岚图汽车科技有限公司 | 车辆制动控制方法及系统 |
| CN120096342B (zh) * | 2025-02-28 | 2026-01-13 | 岚图汽车科技股份有限公司 | 车辆制动控制方法及系统 |
| CN120588962A (zh) * | 2025-08-08 | 2025-09-05 | 万向钱潮股份公司 | 一种线控制动助力器电机控制模式切换方法、系统和设备 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4530116A1 (en) | 2025-04-02 |
| EP4530116A4 (en) | 2026-01-07 |
| CN117642307A (zh) | 2024-03-01 |
| CN117642307B (zh) | 2025-07-25 |
| US20250135900A1 (en) | 2025-05-01 |
| CN120942020A (zh) | 2025-11-14 |
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