Classifications

• • 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
  • B60W30/18018—Start-stop drive, e.g. in a traffic jam
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
  • F02N11/00—Starting of engines by means of electric motors
  • F02N11/08—Circuits specially adapted for starting of engines
  • F02N11/0814—Circuits specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
  • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
  • F02N11/0822—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to action of the driver
• • 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
  • B60W2510/00—Input parameters relating to a particular sub-units
  • B60W2510/10—Change speed gearings
  • B60W2510/1005—Transmission ratio engaged
• • 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
  • B60W2510/00—Input parameters relating to a particular sub-units
  • B60W2510/10—Change speed gearings
  • B60W2510/1005—Transmission ratio engaged
  • B60W2510/101—Transmission neutral state
• • 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
  • B60W2510/00—Input parameters relating to a particular sub-units
  • B60W2510/18—Braking system
  • B60W2510/186—Status of parking brakes
• • 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
  • B60W2540/00—Input parameters relating to occupants
  • B60W2540/12—Brake pedal position
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2400/00—Special features of vehicle units
  • B60Y2400/70—Gearings
  • B60Y2400/71—Manual or semi-automatic, e.g. automated manual transmissions
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
  • F02N2200/00—Parameters used for control of starting apparatus
  • F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
  • F02N2200/0802—Transmission state, e.g. gear ratio or neutral state
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
  • F02N2200/00—Parameters used for control of starting apparatus
  • F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
  • F02N2200/0803—Parking brake state
• • 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
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/10—Internal combustion engine [ICE] based vehicles
  • Y02T10/40—Engine management systems

Definitions

• the invention relates to stopping and restarting management of a motor vehicle engine, in particular a motor vehicle equipped with an automatic stop and start system, and a automatic transmission.
• the Stop and Start system can be deactivated because the stopping of the vehicle, when the latter is operating in reverse, generally have relatively short durations.
• the Stop and Start system can maintain the engine stop because the vehicle is in fact immobilized.
• the Stop and Start strategy is activated and manages the motor stops and restarts dynamically.
• a stop and restart management method of a motor vehicle engine comprising, when a gear selector of this vehicle is in a neutral state, for example when the gear selector is on the position "N":
• the parking brake state is taken into account to decide whether to restart / stop, or whether to maintain it stopped / running. of the motor.
• a motor control signal of this motor vehicle having a value corresponding to a restart / maintenance on is generated if the value of the second parameter corresponds to a released state of the parking brake and a control signal of the motor having a value corresponding to a stop / hold stopped if the value of the second parameter corresponds to a tight state of the parking brake.
• the driver has in fact placed the transmission in neutral and engaged the parking brake, for example a parking brake or an assisted parking brake, then it is considered that the vehicle must remain in place, and the engine is in standby.
• the driver selected the Neutral position without tightening the parking brake, then it is considered that the driver will not oppose a possible restart: if the foot of the brake pedal is raised, the engine leaves the standby state.
• the information provided by the state of the parking brake is used to better interpret the driver's will and adapt the strategy for restarting the engine. This can help to avoid restarting when the driver obviously wants to stay at a standstill, and thus save fuel.
• the vehicle may be equipped with an automatic stop and restart system.
• This system may for example comprise a reversible alternator.
• the method may comprise an authorization step of the automatic stop and restart system, if the second parameter has a value corresponding to a loose parking brake.
• it may be the automatic stop and restart strategy that controls the starting, for example if the first parameter corresponds to a relaxed state of the brake pedal.
• the generation of the control signal is part of an automatic stop and restart strategy, furthermore providing that in the driving mode, the engine is put into a standby state when the speed falls below a threshold and restart the engine if the brake pedal is released.
• the method described above is executed only if the speed of the vehicle is below a threshold, for example 6 km / h.
• the vehicle transmission system may be automatic. It can for example be an automatic gearbox or BVA, a robotic gearbox or BVR, or other. The process described above can thus to better interpret the driver's will when the driver is in neutral.
• the invention can find a particularly interesting application in the context of vehicles equipped with robotized gearboxes, in which the driver has only three lever positions: driving, neutral, or reverse.
• driving has only three lever positions: driving, neutral, or reverse.
• parking devoid of vehicle parking position (Parking)
• the information provided by the parking brake can better interpret the will of the driver, especially since the neutral position may be requested more frequently than in the case of a vehicle equipped with an automatic gearbox.
• the method described above may be implemented by digital signal processing means, for example a processor, a microcontroller or the like.
• This computer program product can be read on hard disk, downloaded or other type of computer support.
• a management device for stopping and restarting a motor vehicle engine comprising:
• processing means arranged for, when a transmission selector of this vehicle is in a neutral state and the value of the first parameter corresponds to a released state of the brake pedal, generating a control signal of the engine of this motor vehicle according to the value of the second parameter, and
• transmission means for sending the signal generated by the processing means to the motor to control the stopping and restarting of this engine.
• This device can include or be integrated in a processor, for example a microcontroller, a microprocessor or other.
• the reception means may for example comprise an input port, an input pin or the like.
• the processing means may for example comprise a CPU core (of the English "Central Processing Unit").
• the transmission means may for example comprise an output pin, an output port or the like.
• a motor vehicle comprising a management system as described above.
• This motor vehicle may advantageously include an automatic stop and start system or Stop and Start, and / or an automatic transmission system.
• Figure 1 shows an example of a vehicle according to one embodiment of the invention.
• Fig. 2 is a flowchart of an exemplary method according to one embodiment of the invention.
• a motor vehicle 1 is equipped with a motor 1 1 and an automatic stop and restart system.
• This system can be integrated in the processor 10 described below.
• the driver may end up having to make an effort to keep the engine of his vehicle in automatic shutdown and save fuel in the period of time. immobilization.
• the driver When the automatic transmission is not equipped with a P position or the driver does not use this position of the transmission, as is the case when the vehicle is equipped with a robotic gearbox, in the prior art, the driver must maintain a pressure on the brake pedal, otherwise the engine restarts, thus exiting the state of the automatic stop by the system Stop and Start. It is known to impose a maintenance of the automatic engine stop when the selector is in neutral and the brake pedal is released. However, when the vehicle is on a non-horizontal plane, that is to say for example if there is a slight slope, there may be a drift of the vehicle, and the driver will have to decide to keep the vehicle immobilized , while braking assistance is limited here.
• the vehicle 1 is equipped with a management device 10 of the engine 1 1, for example a microcontroller.
• the management device 10 receives BPedal signals from a position sensor of the not shown brake pedal, for example an acquisition module 12 in communication with this sensor.
• the management device 10 also receives ParkingB signals from a module 13 in communication with a sensor capable of measuring a state of the parking brake.
• the parking brake may for example include a handbrake, or FPM for Manual Parking Brake, or even a Parking Brake Assisted or FPA.
• an electronic control unit or ECU can control the parking brake.
• the module 13 can then include this electronic control unit.
• the management device 10 receives Selector signals from a management module of the automatic transmission system 14. These Selector signals can thus indicate the position of the selector of the automatic gearbox, for example reverse gear or R, neutral or N, driving or D, or manual or M.
• the management device makes it possible to manage the automatic transition to a state of engine standby, according to the signals from the modules 12, 13, 14.
• the management device 10 makes it possible to control the eventual restart of the motor 1 1, again as a function of the signals coming from the modules 12, 13, 14.
• the flowchart of FIG. 2 corresponds to an exemplary method executed by the management device 10.
• the management device 10 takes into account the ParkingB signals from a sensor status of the parking brake, to adapt the operation of the Stop and Start system.
• the management device 10 tests during a step 201 whether the selector is in the driving position (D ), or in manual clutch position (M). This step can be performed based on the Selector values received from the module 14 during a not shown reception step. For example, during this step 201, the value of the variable Selector can be compared to two predetermined values, corresponding to the positions D and M, respectively. The test is positive in case of equality with one of these predetermined values.
• a value of a first parameter corresponding to a state of the brake pedal for example a value of the parameter BPedal from the module 12 (and received during a step not shown), to a predetermined value, for example 1, to estimate whether the brake pedal is in a supported state or not. If it turns out that the driver is pressing the brake pedal, then the vehicle is kept in a stopped state.
• Step 200 is followed by an unrepresented step of transmitting a control signal to the engine to keep the engine in a sleep state.
• the management device 10 generates a restart control signal for the motor 1 1. This is represented by the step 203. This step 203 is followed by a step (not shown) of transmission of a control signal towards the motor in order to to restart the engine.
• the value of the variable Selector received from the module 14 is compared to a value corresponding to the neutral.
• this test 205 is tested if the selector is at a position corresponding to the reverse (R), during a test 208. If this test is positive, then we disable the Stop & Start and the engine is restarted to allow recovery of driving in reverse. If the test is negative, then the engine stop is maintained, and a malfunction alert is triggered.
• test 205 is positive, that is to say if the vehicle is in neutral, then we compare during a step 206 the value of the variable BPedal, from the module 12, to a value corresponding to a position of support of the brake pedal, for example 1 or other.
• a value of a ParkingB variable (received during a step not shown) is compared to a predetermined value, corresponding to a brake application. parking. If the test 207 shows that the parking brake is tight, then the engine of the vehicle is stopped, even though the vehicle is in neutral, and the brake pedal is released.
• test 207 is negative, that is to say that the parking brake is released, then the strategy of stopping and automatic restart is reactivated during the step 203, and the vehicle can restart .
• FIG. 2 The flowchart of FIG. 2 has been described as relating to a method for exiting the automatic shutdown state. A similar flow chart may be provided for the eventual entry into the state of automatic shutdown of the engine, except that the initial step 200 would then be a step corresponding to a maintenance control of the engine turned on, and that:
• the engine control depends on both the state of the pedal of the engine. brake and the condition of the parking brake. Specifically, if the brake pedal is pressed, it commands an automatic shutdown of the engine, regardless of the position of the parking brake; If this is not the case, the engine is stopped automatically if the parking brake is applied and the ignition is switched on if the parking brake is released.
• the method claimed below thus covers both the automatic standby of the engine and the output of this standby state.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• General Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Transportation (AREA)
• Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
• Regulating Braking Force (AREA)
• Output Control And Ontrol Of Special Type Engine (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=47740992

Family Applications (1)

Country Status (4)

Families Citing this family (6)

Family Cites Families (5)

• 2012
  • 2012-09-27 FR FR1259141A patent/FR2995835B1/fr not_active Expired - Fee Related
• 2013
  • 2013-09-25 WO PCT/FR2013/052249 patent/WO2014049264A1/fr not_active Ceased
  • 2013-09-25 CN CN201380060244.2A patent/CN104837703A/zh active Pending
  • 2013-09-25 EP EP13779294.1A patent/EP2901007A1/de not_active Withdrawn

Non-Patent Citations (1)

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