WO2024140459A1 - 一种控制方法和装置 - Google Patents
一种控制方法和装置 Download PDFInfo
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- WO2024140459A1 WO2024140459A1 PCT/CN2023/140960 CN2023140960W WO2024140459A1 WO 2024140459 A1 WO2024140459 A1 WO 2024140459A1 CN 2023140960 W CN2023140960 W CN 2023140960W WO 2024140459 A1 WO2024140459 A1 WO 2024140459A1
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- torque
- vehicle
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- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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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
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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
- 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
- B60L15/2018—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 for braking on a slope
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- 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
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- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
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- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
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- B60W30/06—Automatic manoeuvring for parking
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- 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
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- B60W30/18118—Hill holding
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- B60W30/18—Propelling the vehicle
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- B60W30/18127—Regenerative braking
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- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
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- B60W40/076—Slope angle of the road
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- 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
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- B60L2240/00—Control parameters of input or output; Target parameters
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- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/60—Navigation input
- B60L2240/64—Road conditions
- B60L2240/642—Slope of road
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- B60L2250/00—Driver interactions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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Definitions
- Electric vehicles or smart vehicles usually have the function of using motors to recycle energy, and can quickly decelerate or even stop the vehicle by controlling the accelerator pedal.
- more and more vehicles have the function of controlling the acceleration, deceleration or parking of the vehicle by manipulating the accelerator pedal, which can reduce the frequency of users stepping on the brake pedal to a certain extent and improve the user's driving experience.
- the use of this energy recovery function cannot guarantee the consistency of the vehicle's braking effect in various braking scenarios. How to achieve consistency in braking effect while recovering energy based on the vehicle's operating conditions has become a problem that needs to be solved.
- the embodiments of the present application provide a control method and device, which can improve the user's driving consistency experience and avoid unexpected hazards caused by inconsistent braking effects.
- a control method is provided, which can be executed by the vehicle, or by a vehicle-mounted terminal disposed in the vehicle, or by a chip, processor or circuit in the vehicle, and the embodiments of the present application are not limited to this.
- the method may include: obtaining accelerator pedal opening information and slope information of the vehicle; determining a motor output torque according to the accelerator pedal opening information and the slope information; and determining a first hydraulic braking torque according to the braking demand torque and the motor output torque.
- the motor output torque may be used to control the actuation of the electric brake mechanism
- the first hydraulic brake torque may be used to control the actuation of the hydraulic brake mechanism
- the user's driving consistency experience can be improved and unexpected hazards caused by inconsistent braking effects can be avoided.
- the motor output torque may include energy recovery torque and slope compensation torque
- determining the motor output torque based on the accelerator pedal opening information and the slope information may include: determining the energy recovery torque based on the accelerator pedal opening information and the vehicle speed information; determining the slope compensation torque based on the slope information.
- the slope compensation torque of the vehicle in the current slope scenario may be determined based on the vehicle weight and/or the vehicle load.
- determining the slope compensation torque based on the slope information may include: determining the slope compensation torque based on the slope information and the vehicle speed information.
- the slope compensation torque is determined based on the slope information and the vehicle speed information.
- the appropriate slope compensation torque can be applied to the vehicle according to the current speed of the vehicle, which can make the control of the electric braking mechanism during the braking process of the vehicle smoother and make the braking process of the vehicle smoother.
- the method also includes: obtaining a first characteristic torque for preventing hill sliding, the first characteristic torque for preventing hill sliding being the torque required to prevent the vehicle from rolling when the vehicle is parked; determining the slope compensation torque based on the slope information may include: when the vehicle speed is greater than or equal to a first threshold, determining the slope compensation torque based on the slope information; or, when the vehicle speed is less than the first threshold, determining the slope compensation torque based on the slope information and the first characteristic torque for preventing hill sliding.
- the first threshold can be an arbitrary value, such as 2 kilometers per hour (km/h), 2.5km/h, etc.
- the vehicle When the vehicle speed is less than the first threshold, the vehicle may be parked.
- the anti-slope torque required for the vehicle when parking can prevent the vehicle from rolling down the slope when parked, thereby ensuring the safety of the vehicle and personnel.
- the slope compensation torque when the vehicle speed is less than the first threshold, is determined based on the slope information and the first characteristic torque for preventing hill slide, which may include: determining the relationship between the slope compensation torque and the vehicle speed based on the slope compensation first characteristic torque and the first characteristic torque for preventing hill slide, the slope compensation first characteristic torque being the slope compensation torque when the vehicle speed is equal to the first threshold; when the vehicle speed is less than the first threshold, determining the slope compensation torque based on the vehicle speed information and the relationship between the slope compensation torque and the vehicle speed.
- the slope compensation torque of the vehicle when the vehicle speed is a first threshold ie, the slope compensation first characteristic torque, may also be determined according to the slope information.
- the user experience can be improved by smoothly transitioning the slope compensation torque from the first characteristic torque for slope compensation to the first characteristic torque for preventing slope slipping.
- the method may further include: obtaining energy recoverable power information; determining the energy recovery torque based on the accelerator pedal opening information and the vehicle speed information, which may include: determining the energy recovery torque based on the accelerator pedal opening information, the vehicle speed information and the energy recoverable power information.
- the limitations of the motor, battery, etc. on the recoverable power during the energy recovery process are taken into consideration, and the actual braking effect of the vehicle can be made consistent with the expected braking effect based on the actual situation of energy recovery.
- the vehicle may include a first electric brake mechanism and a second electric brake mechanism
- the method may further include: allocating the first motor output torque to the first electric brake mechanism and allocating the second motor output torque to the second electric brake mechanism according to the motor output torque; adjusting the first motor output torque allocated to the first electric brake mechanism and adjusting the second motor output torque allocated to the second electric brake mechanism according to the operating conditions of the first motor output torque and the second motor output torque.
- the energy recovery rate can be improved while achieving a consistent braking effect.
- the vehicle includes a hydraulic braking system
- the method may further include: controlling braking of the vehicle through the hydraulic braking system according to the first hydraulic braking torque.
- the vehicle braking is controlled in combination with the hydraulic braking system, which can prevent the vehicle from skidding, sliding down a slope, etc. caused by braking the vehicle only by the electric braking mechanism in some scenarios, and can ensure the consistency of the braking effect.
- the method may further include: obtaining a first braking torque, the first braking torque being the braking torque applied to the vehicle by the hydraulic braking system; and controlling the braking of the vehicle through the hydraulic braking system based on the first hydraulic braking torque, which may include: controlling the braking of the vehicle through the hydraulic braking system based on the first hydraulic braking torque and the first braking torque.
- the braking effect of the hydraulic braking system can be made consistent with the set expectations to ensure the consistency of the braking effect.
- the method may further include: determining the braking requirement torque according to the driving mode of the vehicle and/or user indication information.
- differentiated settings of braking effects under different driving modes can be achieved to enhance the user experience.
- the method may also include: when the accelerator pedal opening is less than or equal to a preset threshold, controlling the vehicle braking according to the motor output torque and the first hydraulic braking torque until the vehicle is in a parked state; when the duration of the vehicle in the parked state is greater than or equal to a first duration, configuring the motor output torque to zero.
- maintaining the motor output torque within the first period of time after the vehicle is parked is beneficial to ensuring vehicle braking in the event of a hydraulic brake failure and can avoid unexpected hazards caused by hydraulic brake failure.
- the method may further include: when the duration of the vehicle being in the parked state is greater than or equal to a second time length, enabling the parking brake function and configuring the first hydraulic braking torque to zero, and the second time length is greater than the first time length.
- the method may further include: determining a relationship between a change in the motor output torque and a vehicle speed based on the slope information.
- the relationship between the motor output torque and the vehicle speed is determined according to the slope, which can be better applied to various mid-slope scenarios, which is beneficial To achieve consistent braking effect.
- the motor output torque may include energy recovery torque and slope compensation torque
- the processing unit may be used to: determine the energy recovery torque based on the accelerator pedal opening information and the vehicle speed information; determine the slope compensation torque based on the slope information.
- the acquisition unit can also be used to: obtain the first characteristic torque for preventing hill sliding, the first characteristic torque for preventing hill sliding being the torque required to prevent the vehicle from rolling down a hill when the vehicle is parked; the processing unit can be used to: determine the slope compensation torque based on the slope information when the vehicle speed is greater than or equal to a first threshold; or, determine the slope compensation torque based on the slope information and the first characteristic torque for preventing hill sliding when the vehicle speed is less than the first threshold.
- the processing unit can be used to: determine the relationship between the slope compensation torque and the vehicle speed based on the slope compensation first characteristic torque and the anti-slope first characteristic torque, the slope compensation first characteristic torque being the slope compensation torque when the vehicle speed is equal to a first threshold value; when the vehicle speed is less than the first threshold value, determine the slope compensation torque based on the vehicle speed information and the relationship between the slope compensation torque and the vehicle speed.
- the vehicle may include a first electric braking mechanism and a second electric braking mechanism
- the processing unit may also be used to: allocate the first motor output torque to the first electric braking mechanism and allocate the second motor output torque to the second electric braking mechanism according to the motor output torque; adjust the first motor output torque allocated to the first electric braking mechanism and adjust the second motor output torque allocated to the second electric braking mechanism according to the operating conditions of the first motor output torque and the second motor output torque.
- the vehicle may include a hydraulic braking system
- the processing unit may also be used to: control the braking of the vehicle through the hydraulic braking system according to the first hydraulic braking torque.
- the acquisition unit can also be used to: obtain a first braking torque, which is the braking torque applied to the vehicle by the hydraulic braking system; the processing unit can be used to: control the braking of the vehicle through the hydraulic braking system based on the first hydraulic braking torque and the first braking torque.
- the processing unit may also be used to: determine the braking requirement torque based on the driving mode of the vehicle and/or user indication information.
- the processing unit can also be used to: when the accelerator pedal opening is less than or equal to a preset threshold, control the vehicle braking according to the motor output torque and the first hydraulic braking torque until the vehicle is in a parked state; when the duration of the vehicle being in the parked state is greater than or equal to a first duration, configure the motor output torque to zero.
- the processing unit can also be used to: enable the parking brake function and configure the first hydraulic braking torque to zero when the duration of the vehicle being in the parked state is greater than or equal to a second time length, and the second time length is greater than the first time length.
- the processing unit may also be used to: determine, based on the slope information, a changing relationship between the motor output torque and the vehicle speed.
- a control device which includes: a memory for storing a computer program; and a processor for executing the computer program stored in the memory, so that the device executes the method in the above-mentioned first aspect and any possible implementation manner thereof.
- a computer-readable storage medium wherein the computer-readable medium stores a computer program, and when the computer program runs on a computer, the computer executes the method in any possible implementation of the first aspect.
- FIG1 is a functional block diagram of an intelligent driving device provided in an embodiment of the present application.
- FIG. 2 is a schematic diagram of a system architecture provided in an embodiment of the present application.
- FIG3 is a flow chart of a control method provided in an embodiment of the present application.
- FIG. 4 is a schematic diagram of a method for determining vehicle braking requirement information provided in an embodiment of the present application.
- FIG5 is a schematic diagram of a human-vehicle interaction scenario provided in an embodiment of the present application.
- FIG. 6 is a schematic diagram of a method for distributing braking torque provided in an embodiment of the present application.
- FIG. 7 is a schematic diagram of a method for determining the output torque of a motor provided in an embodiment of the present application.
- FIG8 is a schematic diagram of a method for determining driving intention based on accelerator pedal opening provided in an embodiment of the present application.
- FIG. 10 is a schematic diagram of another method for controlling vehicle parking provided in an embodiment of the present application.
- FIG. 11 is a schematic diagram of a process for controlling a hydraulic brake mechanism provided in an embodiment of the present application.
- FIG. 12 is a schematic diagram of a process for controlling vehicle braking provided in an embodiment of the present application.
- FIG. 13 is a flow chart of another control method provided in an embodiment of the present application.
- FIG. 14 is a flow chart of another control method provided in an embodiment of the present application.
- FIG1 is a functional block diagram of an intelligent driving device 100 provided in an embodiment of the present application.
- the intelligent driving device 100 may include a perception system 120, a display device 130, and a computing platform 150, wherein the perception system 120 may include one or more sensors for sensing information about the environment surrounding the intelligent driving device 100.
- the perception system 120 may include a positioning system, and the positioning system may be a global positioning system (GPS), a Beidou system, or other positioning systems.
- the perception system 120 may also include an inertial measurement unit (IMU), one or more of a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera device.
- IMU inertial measurement unit
- the computing platform 150 may include one or more processors, such as processors 151 to 15n (n is a positive integer).
- the processor is a circuit with signal processing capability.
- the processor may be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as a field programmable gate array (FPGA).
- ASIC application-specific integrated circuit
- PLD programmable logic device
- the electric brake mechanism 220 can achieve the function of braking energy recovery by converting the kinetic energy of the intelligent driving device into electrical energy, thereby improving energy utilization while enhancing the driving experience.
- Figure 3 is a flow chart of a control method provided in an embodiment of the present application.
- the method 300 can be executed by the above-mentioned intelligent driving device (for example, a vehicle), or can be executed by the above-mentioned computing platform or other control device, or the method can be executed by a chip, processor, etc. in the computing platform or control device.
- the above-mentioned intelligent driving device for example, a vehicle
- the above-mentioned computing platform or other control device or the method can be executed by a chip, processor, etc. in the computing platform or control device.
- the method may be executed by a vehicle controller. In another embodiment, the method may be executed by a chip or processing circuit of a vehicle controller.
- the computing platform or control device when the method is executed by the above-mentioned computing platform or other control device, can directly obtain the required accelerator pedal opening information and slope information from the above-mentioned sensor, or can also obtain the accelerator pedal opening information and slope information from other devices through the internal circuit of the vehicle.
- the driver's braking intention can be determined based on the accelerator pedal opening information.
- the motor output torque can be determined based on the accelerator pedal opening information and the slope information.
- the braking effect can be measured by the braking deceleration, braking distance, etc. of the vehicle.
- the required braking torque is called the braking demand torque.
- factors such as the performance and operation of the vehicle's energy conversion device and/or energy storage device may affect the energy recoverable power of the electric brake mechanism.
- factors such as environmental conditions (such as excessively high or low ambient temperature), the remaining battery power (state of charge, SOC), and battery life may affect the energy recoverable power.
- the energy recovery power supported by the battery can be referred to as the battery recoverable power.
- environmental conditions such as ambient temperature and ambient air pressure, as well as factors such as motor life and workload, may affect the energy recovery power supported by the motor (which can be referred to as the motor recoverable power).
- the power consumption of the vehicle's electrical equipment such as the power consumption of electrical equipment such as vehicle-mounted display screens, audio, air conditioning, and cockpit domain controllers, may also affect the energy recoverable power.
- determining the motor output torque according to accelerator pedal opening information and slope information may include: determining the motor output torque according to accelerator pedal opening information, slope information and energy recoverable power.
- the vehicle may include more or fewer electric brake mechanisms.
- the vehicle may include motor 1, motor 2, and motor 3 for braking, and the first motor output torque, the second motor output torque, and the third motor output torque are allocated to the motor 1, the motor 2, and the motor 3, respectively.
- the sum of the target motor output torques corresponding to each of the multiple electric brake mechanisms may be equal to the motor output torque determined based on the accelerator pedal opening information.
- the braking torque actually applied to the vehicle by the hydraulic braking system may be obtained, and the braking torque may be referred to as an actual hydraulic braking torque, or may also be referred to as a first braking torque.
- the vehicle speed when the vehicle speed is less than the first threshold, if the opening of the accelerator pedal is less than or equal to a preset value (such as 5%, 6%, etc.), it can be determined that the driver intends to park the vehicle.
- a preset value such as 5%, 6%, etc.
- the torque required to prevent the vehicle from rolling down the slope when the vehicle is parked can be called the first characteristic torque for preventing rolling down the slope.
- the slope compensation torque (which may be referred to as the first characteristic torque of slope compensation) when the vehicle speed is the first threshold value may be obtained, and the relationship between the slope compensation torque and the vehicle speed may be determined based on the slope compensation torque and the first characteristic torque for preventing slope slippage.
- the curve of the slope compensation torque changing with the vehicle speed may be determined based on a linear function, a quadratic function, a cubic spline function, a piecewise function, or the like.
- the slope compensation torque when the vehicle speed is less than the first threshold, can be determined based on the relationship between the slope compensation torque and the vehicle speed and the vehicle speed information. For example, based on the slope compensation torque variation curve determined above with the vehicle speed, the slope compensation torque corresponding to the current vehicle speed is determined, thereby achieving a smooth transition of the slope compensation torque.
- a scene with slope information less than or equal to a slope threshold may be determined as a flat road scene.
- the slope threshold may be 0.5 degrees, 1 degree, or other values.
- the vehicle braking may be controlled until the vehicle is in a parked state.
- the parking brake function when the vehicle is in a parked state and the duration is greater than or equal to a second time length, the parking brake function can be enabled and the first hydraulic brake torque can be configured to be zero.
- the first time length and the second time length can be any time length, and the second time length can be greater than the first time length.
- the first time length is 30 seconds (second, s) or 1 minute (minute, min), and the second time length can be 5 minutes or 8 minutes.
- Fig. 4 is a schematic diagram of a method for determining vehicle braking requirement information provided by an embodiment of the present application. The following description is made using the intelligent driving device as a vehicle.
- the vehicle may include multiple driving modes, such as comfort mode, sports mode, economy mode, etc.
- Users such as developers, etc.
- the braking effect of the vehicle may be reflected as the braking deceleration of the vehicle.
- a vehicle can be operated in driving mode 1 and driving mode 2 respectively.
- the target braking deceleration of the vehicle can be -0.15 gravitational acceleration (g); if the vehicle is in driving mode 2, the target braking deceleration of the vehicle can be -0.20g, as shown in FIG4.
- the target braking deceleration can represent the braking deceleration that the vehicle is expected to achieve during the braking process, and the vehicle is controlled to brake based on the target braking deceleration to distinguish the actual braking deceleration of the vehicle under the action of the braking mechanism.
- the graphical user interface in FIG. 5 may be a user interacting with the vehicle through an in-vehicle display screen (eg, a central control screen). It should be understood that human-computer interaction can also be performed through voice, gesture instructions, etc., and this embodiment of the application does not limit this.
- the performance of the electric brake mechanism may not meet the requirements of the braking demand torque, or braking the vehicle only by the electric brake mechanism may not match the expected braking effect, and the electric brake mechanism and the hydraulic brake mechanism may be combined to brake the vehicle.
- the braking demand torque can be disassembled into the motor output torque and the target hydraulic brake torque, and the vehicle is braked by coordinating the electric brake mechanism and the hydraulic brake mechanism.
- FIG7 is a schematic diagram of a method for determining the output torque of a motor provided in an embodiment of the present application.
- part of the vehicle's kinetic energy will be converted into potential energy during the vehicle braking process; while in a downhill scenario, part of the vehicle's potential energy will be converted into kinetic energy during the vehicle braking process.
- the slope information of the slope on which the vehicle is located will affect the operation of the electric brake mechanism based on energy recovery.
- the relationship between the motor output torque and the vehicle speed can be determined based on the slope information. For example, as shown in Figure 7, in the speed range of V1 to V0, the absolute value of the slope of the motor output torque of the uphill scene changing with the vehicle speed is greater than the absolute value of the slope of the motor output torque of the downhill scene changing with the vehicle speed, and the absolute value of the slope of the motor output torque of the flat road scene changing with the vehicle speed can be between the two. In other words, at the same vehicle speed, the absolute value of the target motor output torque of the uphill scene is less than the absolute value of the target motor output torque of the uphill scene, and the absolute value of the target motor output torque of the flat road scene can be between the two. For another example, in the uphill scene, when the vehicle is at different slopes, the relationship between the target motor output torque and the vehicle speed may also be different.
- the braking force corresponding to the torque output by the motor can also be in the same direction as the vehicle's travel.
- the torque applied or required to be applied by the electric brake mechanism and the corresponding force can also be in the same direction as the vehicle's travel to prevent the vehicle from sliding down the slope under the action of gravity.
- the motor output torque needs to be calibrated.
- the motor output torque can be divided into energy recovery torque and slope compensation torque.
- FIG8 is a schematic diagram of a method for determining driving intention based on accelerator pedal opening provided in an embodiment of the present application.
- opening value of the accelerator pedal increases sequentially from opening 1 to opening 6.
- opening 2 may be 5%
- opening 3 may be 10%
- opening 6 may be 25%, and so on.
- the exit and/or activation timing of the energy recovery function can be determined according to the accelerator pedal opening information. For example, taking the accelerator pedal opening as opening 6 as an example, when the vehicle speed is greater than V4, the energy recovery function can be enabled during the braking process of the vehicle, and the target energy recovery torque of the vehicle during the braking process can be determined based on the torque variation curve with vehicle speed at opening 6 shown in FIG8. For another example, taking the accelerator pedal opening as opening 5 as an example, when the vehicle speed is greater than V3, the energy recovery function can be enabled during the braking process of the vehicle, and the target energy recovery torque of the vehicle during the braking process can be determined based on the torque variation curve with vehicle speed at opening 5 shown in FIG8, and the above V3 can be less than V4.
- V4 when the vehicle speed is less than or equal to V4 (for example, the vehicle speed is V2), when the accelerator pedal opening is detected to be opening 6, the vehicle can be controlled to accelerate.
- V3 can be 50km/h, or 55km/h or other values; the above V4 can be 65km/h, or 70km/h or other values.
- the energy recovery torque can be determined in combination with the performance of the electric brake mechanism. For example, as shown in FIG8 , when the vehicle speed is greater than or equal to V5, the energy recovery torque curve when the accelerator pedal is at opening 1 and opening 2 can be determined in combination with the actuation characteristics of the electric brake mechanism.
- the vehicle speed V5 can be 100 km/h, 110 km/h or other values.
- the braking requirement torque may be determined according to the driving mode and/or user indication information.
- openings 1 to 6 may also be other values.
- the opening 2 may be 7%
- the opening 6 may be 27%, etc., and the embodiment of the present application does not limit this.
- the relationship between the energy recovery torque and the accelerator pedal opening can be obtained by calibration when the vehicle is driving on a flat road.
- the slope compensation torque determined according to the slope information the target motor output torque of the vehicle in a flat road, uphill or downhill scenario can be determined.
- a first threshold value (denoted as V1)
- a preset value such as 5%, 6%, etc.
- the motor output torque can be determined based on the slope information and the first characteristic torque for preventing sliding downhill.
- the first characteristic torque for preventing sliding downhill of the vehicle can be greater than 0, that is, the force corresponding to the torque is the same as the direction of travel of the vehicle; in a downhill scenario, the first characteristic torque for preventing sliding downhill of the vehicle can be less than 0, that is, the force corresponding to the torque is opposite to the direction of travel of the vehicle, as shown in Figure 7.
- the first characteristic torque for preventing sliding downhill can be determined based on the slope information and the vehicle load information.
- Fig. 9 is a schematic diagram of a method for controlling a vehicle to park provided in an embodiment of the present application, wherein the vehicle is in an uphill scenario.
- the vehicle when it is determined that the driver intends to park, the vehicle can be parked by means of an electric brake mechanism and a hydraulic brake mechanism.
- an electric brake mechanism For example, in the braking process in an uphill scenario shown in FIG9 , when the opening of the accelerator pedal is less than a preset threshold, the vehicle can be controlled to continue to decelerate until the vehicle speed reaches 0.
- the preset threshold can be 3%, 4%, or other values.
- the motor output torque in this stage can be determined according to the first characteristic torque of the vehicle for preventing slope sliding, the accelerator pedal opening information and the slope information.
- the target motor output torque corresponding to the vehicle speed V1 can be smoothly transitioned to the anti-slope sliding torque in the manner shown in FIG. 7, thereby determining the motor output torque in stage 4, and determining the hydraulic braking torque in combination with the braking demand torque.
- the electric brake mechanism is controlled to actuate, so as to prevent the vehicle from sliding down the slope when parked.
- stage 6 the brake fluid pressure in the hydraulic brake mechanism is maintained by the hydraulic brake mechanism to keep the vehicle in a parked state.
- the vehicle load calculation module can be used to determine vehicle load information.
- the vehicle load can be estimated based on the weight of the vehicle.
- the vehicle load can be calculated in combination with tire pressure.
- the vehicle can monitor the state of the suspension, and the vehicle load can be calculated in combination with the state information of the suspension.
- the VDC can determine the hydraulic braking torque required to meet the vehicle braking demand based on the braking demand torque and the motor output torque, and send the target hydraulic braking torque required to meet the braking demand torque to the IPB.
- the IPB can receive the hydraulic braking torque and control the hydraulic braking mechanism to actuate according to the hydraulic braking torque.
- the IPB can implement the braking process in stage 2 shown in FIG. 9 or FIG. 10 above through the hydraulic braking mechanism.
- the method 300 shown in FIG. 3 may be implemented, or an extension of the method 300 may be implemented.
- step S1204 and step S1212 may be executed simultaneously, or step S1204 may be executed first, or step S1212 may be executed first, and the embodiment of the present application does not limit this.
- S1216 adjust the torque allocated to the hydraulic brake mechanism according to the operating condition of the electric brake mechanism.
- the acquisition unit 1510 can also be used to: acquire the first characteristic torque for preventing the vehicle from rolling down a slope, where the first characteristic torque for preventing the vehicle from rolling down a slope is the torque required to prevent the vehicle from rolling down a slope when the vehicle is parked; the processing unit 1520 can be used to: determine the slope compensation torque based on the slope information when the vehicle speed is greater than or equal to a first threshold; or determine the slope compensation torque based on the slope information and the first characteristic torque for preventing the vehicle from rolling down a slope when the vehicle speed is less than the first threshold.
- the processing unit 1520 may also be used to determine the braking requirement torque according to the driving mode of the vehicle and/or user instruction information.
- the acquisition unit 1510 can be implemented by at least one transceiver or transceiver-related circuit
- the processing unit 1520 can be implemented by at least one processor or processor-related circuit.
- one or more processors can determine the motor output torque according to the accelerator pedal opening information and the slope information.
- one or more processors can determine the first hydraulic braking torque according to the motor output torque and the braking demand torque.
- the above-mentioned device 1500 can belong to the control module 210 shown in Figure 2, or the device 1500 can be set in the intelligent driving device 100 (for example, the intelligent driving device 100 can be a vehicle), or the device 1500 can be a car machine or other vehicle-mounted terminal set in the vehicle.
- FIG16 is a schematic block diagram of another control device 2000 (hereinafter referred to as device 2000) provided in an embodiment of the present application.
- the device 2000 may include: a processor 2010, an interface circuit 2020, and a memory 2030.
- the processor 2010, the interface circuit 2020, and the memory 2030 are connected via an internal connection path, the memory 2030 is used to store instructions, the processor 2010 is used to execute the instructions stored in the memory 2030, and the interface circuit 2020 receives/sends some parameters.
- the memory 2030 can be coupled to the processor 2010 through an interface, or integrated with the processor 2010.
- the above-mentioned interface circuit 2020 may include but is not limited to a transceiver device such as an input/output interface to achieve communication between the device 2000 and other devices or communication networks.
- the interface circuit 2020 can be used to implement communication between the device 2000 and other devices or communication networks. For example, the information collected by the sensor of the interface circuit 2020 can be used to control the execution device of the vehicle to perform corresponding operations.
- An embodiment of the present application also provides a computer-readable storage medium, which stores program code or instructions.
- the processor When the computer program code or instructions are executed by a processor of a computer, the processor implements any method in Figures 3 to 14 above, and any possible implementation method thereof.
- An embodiment of the present application also provides a chip, including a circuit, for executing any of the methods in Figures 3 to 14 above, and any possible implementation thereof.
- a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
- the character "/" generally indicates that the associated objects before and after are in an "or" relationship.
- the disclosed systems, devices and methods can be implemented in other ways.
- the device embodiments described above are only schematic.
- the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
- Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
- the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art.
- the computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.
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Abstract
Description
Claims (26)
- 一种控制方法,其特征在于,包括:获取车辆的加速踏板开度信息和坡度信息;根据所述加速踏板开度信息和所述坡度信息,确定电机输出扭矩;根据制动需求扭矩和所述电机输出扭矩,确定第一液压制动扭矩。
- 根据权利要求1所述的方法,其特征在于,所述电机输出扭矩包括能量回收扭矩和坡度补偿扭矩,所述根据所述加速踏板开度信息和所述坡度信息,确定电机输出扭矩,包括:根据所述加速踏板开度信息和车速信息,确定所述能量回收扭矩;根据所述坡度信息,确定所述坡度补偿扭矩。
- 根据权利要求2所述的方法,其特征在于,所述根据所述坡度信息,确定所述坡度补偿扭矩,包括:根据所述坡度信息和所述车速信息,确定所述坡度补偿扭矩。
- 根据权利要求2或3所述的方法,其特征在于,所述方法还包括:获取防溜坡第一特征扭矩,所述防溜坡第一特征扭矩为所述车辆驻停时防止车辆溜坡所需的扭矩;所述根据所述坡度信息,确定所述坡度补偿扭矩,包括:在车速大于或等于第一阈值时,根据所述坡度信息,确定所述坡度补偿扭矩;或,在车速小于所述第一阈值时,根据所述坡度信息和所述防溜坡第一特征扭矩,确定所述坡度补偿扭矩。
- 根据权利要求4所述的方法,其特征在于,所述在车速小于所述第一阈值时,根据所述坡度信息和所述防溜坡第一特征扭矩,确定所述坡度补偿扭矩,包括:根据坡度补偿第一特征扭矩和所述防溜坡第一特征扭矩,确定所述坡度补偿扭矩随车速的变化关系,所述坡度补偿第一特征扭矩为所述车辆的车速等于第一阈值时的坡度补偿扭矩;在车速小于所述第一阈值时,根据所述车速信息和所述坡度补偿扭矩随车速的变化关系,确定所述坡度补偿扭矩。
- 根据权利要求2至5中任一项所述的方法,其特征在于,所述方法还包括:获取能量可回收功率信息;所述根据所述加速踏板开度信息和车速信息,确定所述能量回收扭矩,包括:根据所述加速踏板开度信息、车速信息和所述能量可回收功率信息,确定所述能量回收扭矩。
- 根据权利要求2至6中任一项所述的方法,其特征在于,所述车辆包括第一电制动机构和所述第二电制动机构,所述方法还包括:根据所述电机输出扭矩,为所述第一电制动机构分配第一电机输出扭矩,为所述第二电制动机构分配第二电机输出扭矩;根据所述第一电机输出扭矩和所述第二电机输出扭矩的运行情况,调整为所述第一电制动机构分配的所述第一电机输出扭矩,以及,调整为所述第二电制动机构分配的所述第二电机输出扭矩。
- 根据权利要求1至7中任一项所述的方法,其特征在于,所述车辆包括液压制动系统,所述方法还包括:根据所述第一液压制动扭矩,通过所述液压制动系统控制所述车辆制动。
- 根据权利要求1至8中任一项所述的方法,其特征在于,所述方法还包括:根据所述车辆的驾驶模式和/或用户指示信息,确定所述制动需求扭矩。
- 根据权利要求1至9中任一项所述的方法,其特征在于,所述方法还包括:在所述加速踏板开度小于或等于预设阈值时,根据所述电机输出扭矩和所述第一液压制动扭矩,控制所述车辆制动直至所述车辆处于驻停状态;在所述车辆处于驻停状态的持续时间大于或等于第一时长时,将所述电机输出扭矩配置为零。
- 根据权利要求10所述的方法,其特征在于,所述方法还包括:在所述车辆处于驻停状态的持续时间大于或等于第二时长时,启用驻车制动功能,并将所述第一液压制动扭矩配置为零,所述第二时长大于所述第一时长。
- 一种控制装置,其特征在于,所述装置包括:获取单元,用于获取车辆的加速踏板开度信息和坡度信息;处理单元,用于根据所述加速踏板开度信息和所述坡度信息,确定电机输出扭矩;根据所述制动需求扭矩和所述电机输出扭矩,确定第一液压制动扭矩。
- 根据权利要求12所述的装置,其特征在于,所述电机输出扭矩包括能量回收扭矩和坡度补偿扭矩,所述处理单元,用于:根据所述加速踏板开度信息和车速信息,确定所述能量回收扭矩;根据所述坡度信息,确定所述坡度补偿扭矩。
- 根据权利要求13所述的装置,其特征在于,所述处理单元,用于:根据所述坡度信息和所述车速信息,确定所述坡度补偿扭矩。
- 根据权利要求13或14所述的装置,其特征在于,所述获取单元,还用于:获取防溜坡第一特征扭矩,所述防溜坡第一特征扭矩为所述车辆驻停时防止车辆溜坡所需的扭矩;所述处理单元,用于:在车速大于或等于第一阈值时,根据所述坡度信息,确定所述坡度补偿扭矩;或,在车速小于所述第一阈值时,根据所述坡度信息和所述防溜坡第一特征扭矩,确定所述坡度补偿扭矩。
- 根据权利要求15所述的装置,其特征在于,所述处理单元,用于:根据坡度补偿第一特征扭矩和所述防溜坡第一特征扭矩,确定所述坡度补偿扭矩随车速的变化关系,所述坡度补偿第一特征扭矩为所述车辆的车速等于第一阈值时的坡度补偿扭矩;在车速小于所述第一阈值时,根据所述车速信息和所述坡度补偿扭矩随车速的变化关系,确定所述坡度补偿扭矩。
- 根据权利要求13至16中任一项所述的装置,其特征在于,所述获取单元,还用于:获取能量可回收功率信息;所述处理单元,用于:根据所述加速踏板开度信息、车速信息和所述能量可回收功率信息,确定所述能量回收扭矩。
- 根据权利要求13至17中任一项所述的装置,其特征在于,所述车辆包括第一电制动机构和所述第二电制动机构,所述处理单元,还用于:根据所述电机输出扭矩,为所述第一电制动机构分配第一电机输出扭矩,为所述第二电制动机构分配第二电机输出扭矩;根据所述第一电机输出扭矩和所述第二电机输出扭矩的运行情况,调整为所述第一电制动机构分配的所述第一电机输出扭矩,以及,调整为所述第二电制动机构分配的所述第二电机输出扭矩。
- 根据权利要求12至18中任一项所述的装置,其特征在于,所述车辆包括液压制动系统,所述处理单元,还用于:根据所述第一液压制动扭矩,通过所述液压制动系统控制所述车辆制动。
- 根据权利要求12至19中任一项所述的装置,其特征在于,所述处理单元,还用于:根据所述车辆的驾驶模式和/或用户指示信息,确定所述制动需求扭矩。
- 根据权利要求12至20中任一项所述的装置,其特征在于,所述处理单元,还用于:在所述加速踏板开度小于或等于预设阈值时,根据所述电机输出扭矩和所述第一液压制动扭矩,控制所述车辆制动直至所述车辆处于驻停状态;在所述车辆处于驻停状态的持续时间大于或等于第一时长时,将所述电机输出扭矩配置为零。
- 根据权利要求21所述的装置,其特征在于,所述处理单元,还用于:在所述车辆处于驻停状态的持续时间大于或等于第二时长时,启用驻车制动功能,并将所述第一液压制动扭矩配置为零,所述第二时长大于所述第一时长。
- 一种装置,其特征在于,包括:存储器,用于存储计算机程序;处理器,用于执行所述存储器中存储的计算机程序,以使得所述装置执行如权利要求1至11中任一项所述的方法。
- 一种车辆,其特征在于,包括如权利要求12至23中任一项所述的装置。
- 一种计算机可读存储介质,其特征在于,其上存储有计算机程序,所述计算机程序被计算机执行时,以使得实现如权利要求1至11中任一项所述的方法。
- 一种计算机程序产品,其特征在于,所述计算机程序产品中包括计算机程序代码,当所述计算机程序代码在计算机上运行时,如权利要求1至11中任一项所述的控制方法被执行。
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| CN118665206A (zh) * | 2024-07-05 | 2024-09-20 | 奇瑞汽车股份有限公司 | 一种电动汽车单踏板扭矩控制方法和系统 |
| CN118894110A (zh) * | 2024-09-02 | 2024-11-05 | 北京易控智驾科技有限公司 | 车辆控制方法、装置及无人车 |
| CN119017949A (zh) * | 2024-08-06 | 2024-11-26 | 成都大运汽车集团有限公司 | 一种电动汽车单踏板控制软件安全机制 |
| CN119239315A (zh) * | 2024-09-30 | 2025-01-03 | 东风汽车集团股份有限公司 | 新能源商用车的主动靠齿方法、装置、设备及存储介质 |
| CN119261569A (zh) * | 2024-11-22 | 2025-01-07 | 上海汽车集团股份有限公司 | 一种能量回收受限时的制动补偿控制系统及方法 |
| CN119283649A (zh) * | 2024-11-04 | 2025-01-10 | 江苏零一汽车科技有限公司 | 车辆缓速控制方法、装置、设备及存储介质 |
| CN119369951A (zh) * | 2024-12-31 | 2025-01-28 | 安徽安凯汽车股份有限公司 | 一种新能源客车的扭矩控制方法、装置及系统 |
| CN120439811A (zh) * | 2025-05-28 | 2025-08-08 | 招商局检测车辆技术研究院有限公司 | 一种基于重型换电商用车的能量管理控制方法及系统 |
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| CN118597078B (zh) * | 2024-08-07 | 2025-03-07 | 比亚迪股份有限公司 | 一种车辆的制动系统及车辆 |
| CN119773717B (zh) * | 2025-01-07 | 2025-09-23 | 一汽解放汽车有限公司 | 一种汽车制动力的动态调节方法、装置及车辆 |
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| CN118894110A (zh) * | 2024-09-02 | 2024-11-05 | 北京易控智驾科技有限公司 | 车辆控制方法、装置及无人车 |
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| CN120439811A (zh) * | 2025-05-28 | 2025-08-08 | 招商局检测车辆技术研究院有限公司 | 一种基于重型换电商用车的能量管理控制方法及系统 |
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| US20250333061A1 (en) | 2025-10-30 |
| EP4628375A1 (en) | 2025-10-08 |
| CN118269913A (zh) | 2024-07-02 |
| JP2026501663A (ja) | 2026-01-16 |
| EP4628375A4 (en) | 2026-03-04 |
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