EP4222009A1 - Device for controlling the restarting of a combustion engine of a hybrid vehicle - Google Patents

Device for controlling the restarting of a combustion engine of a hybrid vehicle

Info

Publication number
EP4222009A1
EP4222009A1 EP21749680.1A EP21749680A EP4222009A1 EP 4222009 A1 EP4222009 A1 EP 4222009A1 EP 21749680 A EP21749680 A EP 21749680A EP 4222009 A1 EP4222009 A1 EP 4222009A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
control device
speed
combustion engine
acceleration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21749680.1A
Other languages
German (de)
French (fr)
Inventor
Ludovic Gaudichon
Valentina CIARLA
Jean Pierre CHEMISKY
Jean Christophe Guiban
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stellantis Auto SAS
Original Assignee
PSA Automobiles SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PSA Automobiles SA filed Critical PSA Automobiles SA
Publication of EP4222009A1 publication Critical patent/EP4222009A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K6/485—Motor-assist type
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • 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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • 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
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
    • 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
    • B60W30/18063—Creeping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/52—Driving a plurality of drive axles, e.g. four-wheel drive
    • 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
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • 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
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B60W2520/105—Longitudinal acceleration
    • 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
    • B60W2540/10—Accelerator pedal position
    • 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
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/18—Propelling the vehicle
    • B60Y2300/18008—Propelling the vehicle related to particular drive situations
    • B60Y2300/18058—Creeping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/18—Propelling the vehicle
    • B60Y2300/192—Power-up or power-down of the driveline, e.g. start up of a cold engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/60—Control of electric machines, e.g. problems related to electric motors or generators
    • B60Y2300/64—Drag run or drag torque compensation, e.g. motor to drive engine with drag torque or engine speed is brought to start speed before injection and firing
    • 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
    • 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
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • TITLE RESTART CONTROL DEVICE FOR A COMBUSTION ENGINE OF A HYBRID VEHICLE
  • the invention relates to hybrid vehicles which comprise a thermal engine and a non-thermal driving machine respectively consuming fuel and energy (or power) stored in at least one energy storage means to provide torque , together or separately, for at least one train.
  • the invention relates both to electrical energy storage means and to hydraulic or pneumatic energy storage means. Furthermore, the invention concerns both the case in which the thermal engine and the non-thermal driving machine provide two torques for the same train and the case in which the thermal engine and the non-thermal driving machine provide two torques respectively for two trains.
  • Some hybrid vehicles have an automatic function known as “crawling” (or “crawling”), allowing them to continue to move smoothly at low speed (typically from 0 to 12 km/h on the flat or on a slope) thanks to the supply of a variable torque as soon as the speed of the vehicle changes below a threshold and the driver does not act on the pedal accelerator.
  • This mode of travel or driving, referred to as “crawling mode” throughout the text of this document, allows the driver to maneuver his vehicle more easily by only needing to control the steering wheel and temporarily operate the pedal. of brake.
  • Patent document WO-A1-201938492 discloses a control device anticipating the start of the thermal engine so as to ensure the creeping mode when, for example, the non-thermal driving machine is unable to ensuring the creeping mode on its own according to the state of the energy storage means. [006] Unfortunately, this control device presupposes that, in creeping mode with only the non-thermal driving machine generating propulsion, the maximum power that the non-thermal driving machine can deliver, independently of the state of the energy storage, is sufficient in all cases of life of the vehicle in creeping mode.
  • hybrid vehicles which include a low-capacity non-thermal driving machine, the power or torque of which may be insufficient in particular life situations of the vehicle in creeping mode, for example when the vehicle is heavily loaded and /or on a slope, and causing the vehicle to roll back while the combustion engine is restarted.
  • the object of the invention is to remedy this lack by proposing a control device suitable for hybrid vehicles which include a low-capacity non-thermal driving machine without there being any possibility of these vehicles rolling back.
  • the subject of the invention is a control device for a vehicle, this vehicle comprising:
  • a brake control device coupled to a braking circuit of the vehicle
  • this control device comprising means for control triggering the restart of the combustion engine, when:
  • the vehicle is traveling at a speed lower than a first threshold speed
  • the vehicle is rolling with a negative acceleration lower than a threshold acceleration
  • the brake control device is not actuated by the driver.
  • this control device advantageously makes it possible to restart the heat engine before the vehicle exhibits a reversing speed or a reversing displacement, even though this vehicle is in conditions increasing the probability of occurrence of a reversal .
  • this control device will prevent the appearance of a recoil even for a light hybrid vehicle, that is to say having the low-capacity non-thermal driving machine. It is then no longer useful to have a high capacity non-thermal driving machine.
  • this control device comprising means for controlling the vehicle in a creeping mode, characterized in that the first threshold speed is a predetermined maximum authorized speed of the vehicle for the mode creeping walk.
  • the creeping mode is a mode of vehicle operation which increases the probability of the appearance of a reversal of the vehicle. It is then judicious, while the vehicle is operating in this creep mode, that the control device be as described, taking into account the predetermined maximum authorized speed of the vehicle for the creep mode as the first threshold speed.
  • the first threshold speed is in particular less than or equal to 15 km/h.
  • the first threshold speed is between 5 and 8 km/h, in particular equal to 7 km/h.
  • the threshold acceleration is less than 0 m/s 2 .
  • the threshold acceleration is between 0 m/s 2 and ⁇ 0.5 m/s 2 , in particular equal to ⁇ 0.2 m/s 2 .
  • the vehicle includes a parking brake device, and following this restart, the control means authorize the stopping of the combustion engine 1 if:
  • this parking brake device is actuated to brake the vehicle, or
  • the vehicle is traveling at a speed greater than a second threshold speed, and with an acceleration greater than or equal to 0 m/s 2 .
  • the second threshold speed is strictly greater than the first threshold speed.
  • the invention also relates to a vehicle comprising:
  • the combustion engine and the non-thermal driving machine configured to supply torques respectively for at least the wheel set
  • the non-thermal driving machine is an electric motor whose maximum possible torque reduced to the wheels of the wheel set for a vehicle speed between 0 and 10 km/h is less than 1250 N.m.
  • Figure 1 shows a diagram of the architecture of a hybrid vehicle for which the invention is applicable.
  • Figure 2 is a set of acceleration curves as a function of vehicle speed illustrating the difference between non-mild hybrid vehicles and mild hybrid vehicles.
  • FIG. 3 shows a timing diagram of the combustion engine restart actions according to the invention.
  • This vehicle includes a mechanical traction system, an electrical power network, and an electrical on-board network.
  • the mechanical traction system comprises:
  • the gearbox 4 further comprises:
  • a second disengageable coupling means for example a clutch, coupling the primary shaft 6 to the second end of the crankshaft 2,
  • non-thermal driving machine 9 for example a reversible electric driving machine 9
  • This third coupling means 10 is for example a gear train.
  • the non-thermal engine 9 can be coupled to a second set of wheels while the combustion engine is coupled to a first set of wheels distinct from the second, or even to the secondary shaft 7 or an intermediate shaft of the gearbox 4.
  • Figure 1 illustrates a single non-thermal driving machine 9, but this is not mandatory and one can have for example a first non-thermal driving machine 9 coupled to a front wheel set of the vehicle, the combustion engine 1 being also coupled to this same set of front wheels, and a second non-thermal driving machine 9 coupled to a set of rear wheels of the vehicle.
  • the torque at the wheel will then be the sum of each torque of the first and second non-thermal driving machine 9 multiplied by a reduction ratio bringing the torque of the non-thermal driving machine 9 to the wheel.
  • the reversible electric machine 3 is coupled to the crankshaft 2, for example to the second end of the crankshaft 2 by the first means of coupling 11 .
  • This first coupling means 11 is for example a belt transmission.
  • the reversible electric machine 3 is for example an alternator-starter making it possible to restart the combustion engine 1, that is to say a short time after a previous stoppage of the combustion engine 1, less than 10 minutes for example: oil of the combustion engine 1 is then still at a higher temperature than an ambient temperature, and under these conditions the restart is a hot start of the combustion engine 1, as opposed to a cold start of the combustion engine 1 when the oil temperature is equal to the ambient temperature.
  • the combustion engine 1 comprises a starter 12 coupled to the crankshaft 2 and able to start the combustion in particular for the cold start.
  • the electrical power network includes:
  • This electrical power network is advantageously the power network of a light hybrid vehicle, for example working at a voltage of 48V.
  • the electrical on-board network includes:
  • the current converter 14 acting as the interface between the electrical on-board network and the electrical power network by transforming, for example, the 48V voltage into a 12V voltage for the on-board network,
  • a service battery 16 for example a 12V battery
  • control devices 18 arranged so as to control the starting or stopping of the combustion engine 1, to control the reversible electric machine 3, the current converter 14, the second coupling means 5, the driving machine non-thermal 9, the motive energy storage means 13, the service battery 16.
  • This vehicle also includes a control command network, not shown, for exchanging information and commands between the control device 18 and the aforementioned organs to be controlled, or between vehicle sensors and the control device 18 .
  • This vehicle further comprises:
  • a brake control device coupled to the braking circuit of the vehicle, for example a brake pedal,
  • a vehicle speed control device for example coupled to the control device 18 which controls the combustion engine 1, or the non-thermal driving machine 9, or a combination of the two, to produce a torque at the wheels of the vehicle depending speed or torque demanded by the speed control device.
  • This vehicle speed control device is for example an accelerator pedal, or a steering wheel control.
  • This vehicle further comprises a parking brake device.
  • This parking brake device is for example a brake independent of the braking circuit of the vehicle, such as for example a handbrake comprising a lever operable by the driver and the actuation of which causes braking of a set of wheels, preferably a rear wheel set of the vehicle.
  • this parking brake can also be a system for locking the secondary shaft of gearbox 4, comprising notched jaws integral with the housing of the gearbox and closing on a toothed crown of the secondary shaft.
  • the control device 18 includes control means. These control means are for example an assembly comprising a supervision computer, and one or more specific computers coupled to the supervision computer via a data bus of the CAN type for the English acronym “Controller Area Network”. These computers include means for acquisition, processing by software instructions stored in a memory as well as the control means required to implement a method. [042] But as a variant, these computers can be grouped together in a single computer.
  • the invention will therefore propose to implement, within the vehicle, a method intended to control the restarting of the combustion engine 1 .
  • control device 18 can be produced in the form of software (or computer (or even “software”) modules )), or electronic circuits (or “hardware”), or a combination of electronic circuits and software modules.
  • the term battery will be understood throughout the text of this document to mean an assembly comprising at least one battery module containing at least one electrochemical cell, the service battery being considered equivalent to at least one module.
  • This battery optionally comprises electrical or electronic means for managing the electrical energy of this at least one module.
  • the battery block When there are several modules, they are grouped together in a housing and then form a battery block, this battery block being often designated by the English expression "battery pack", this housing generally containing a mounting interface, and terminals for connection.
  • battery pack this housing generally containing a mounting interface, and terminals for connection.
  • the word casing designating throughout the text of this document indifferently the casing of the module or of the battery block.
  • electrochemical cell will be understood throughout the text of this document to mean cells generating current by chemical reaction, for example of the lithium-ion (or Li-ion) type, of the Ni-Mh type, or Ni -Cd or even lead.
  • Hybrid vehicles generally use non-thermal drive machines, in particular electric drive machines, capable of generating a maximum torque of 2000 to 2500 Nm at the wheel, between 0 and 12 km/h, which allows the vehicle to climb slopes greater than 25% using only the power of the electric motor.
  • a maximum torque excludes these vehicles from the field of mild hybrids, whose non-thermal driving machine 9, here an electric driving machine, is generally powered by a voltage of 48V and whose maximum torque generated at the wheel is half as much for this same speed range, from 1000 to 1250 Nm, which implies potential reversals on a slope of the vehicle when it advances solely by the force of the non-thermal driving machine 9, the time for the combustion engine 1 to restart and be able to tow the vehicle.
  • Figure 2 illustrates the difference between hybrid vehicles and mild hybrid vehicles, representing the dynamic consequences on the vehicle depending on its speed.
  • the abscissa axis is the vehicle speed in Km/h
  • the ordinate axis is the maximum longitudinal acceleration, in m/s 2 , of the vehicle:
  • a first zone Z1 in which we find the characteristics of non-light hybrid vehicles, for example a maximum acceleration between 1.5 and 4.75 m/s 2 for a speed between 0 and 20 km/h,
  • zone Z2 a second zone Z2, whose maximum longitudinal accelerations are all much lower than zone Z1, characteristic of light hybrid vehicles, for example between 0.5 and 1.15 m/s 2 for a speed between 0 and 16 km/ h.
  • a combustion engine 1 restart time of 0.7 seconds time between the restart command and the instant when the engine is able to supply torque for the traction of the vehicle
  • a combustion engine 1 restart time of 0.7 seconds time between the restart command and the instant when the engine is able to supply torque for the traction of the vehicle
  • reversal of the vehicle will be understood throughout the text of this document to mean a movement of the vehicle in the opposite direction to the selected direction of travel of the vehicle: If a forward speed is selected, the reversal corresponds to a movement of the vehicle backwards and if reverse gear is selected, reversing corresponds to movement of the vehicle in forward gear.
  • Negative acceleration will be understood throughout the text of this document to mean a decrease in the speed of the vehicle moving in the selected direction of travel of the vehicle, or an increase in the speed of the vehicle moving moving in the opposite direction to that of the selected direction of travel of the vehicle.
  • the torque at the wheel, or at the wheel set, regardless of the number of driving wheels, is the sum of the torques of each non-thermal driving machine 9 multiplied by a transmission ratio between the shaft of output of each non-thermal driving machine and the shaft of one or more wheels.
  • this transmission ratio therefore includes the ratio of the shortest speed of the gearbox 4, the ratio of the third coupling means, and the ratio of a differential (not shown) whether or not integrated into the gearbox 4.
  • control device 18 illustrated in the non-limiting example of Figure 1 is configured for a vehicle, this vehicle comprising:
  • this control device 18 comprises the control means triggering the restart of the combustion engine 1, when:
  • the vehicle is traveling at a speed lower than a first threshold speed
  • the vehicle is rolling with a negative acceleration lower than a threshold acceleration
  • the brake control device is not actuated by the driver.
  • This control device 18 comprises means for controlling the vehicle with the creep mode, and the first threshold speed is a predetermined maximum authorized speed of the vehicle for the creep mode.
  • the first threshold speed is for example less than or equal to 15 km/h. It can be between 5 and 8 km/h, in particular equal to 7 km/h as illustrated in FIG. 3.
  • the threshold acceleration is less than 0 m/s 2 .
  • the threshold acceleration is for example between 0 m/s 2 and - 0.5 m/s 2 , in particular equal to - 0.2 m/s 2 as illustrated in FIG. 3.
  • the vehicle includes the parking brake device, and following this restart, the control means authorize the stopping of the combustion engine 1 if:
  • this parking brake device is actuated to brake the vehicle, or
  • the vehicle is traveling at a speed greater than a second threshold speed, and with a positive acceleration greater than or equal to 0 m/s 2 .
  • the second threshold speed is for example greater than the first threshold speed, so as to ensure hysteresis between the restarting of the combustion engine 1 and the authorization to stop the combustion engine 1 .
  • the second threshold speed is between 103% and 150% of the first threshold speed.
  • the second threshold speed is between 103% and 115% of the first threshold speed. More precisely, the first threshold speed being 7 km/h, the second threshold speed will be for example 8 km/h.
  • This vehicle includes the control device 18.
  • the non-thermal driving machine 9 is an electric motor whose maximum possible torque reduced to the wheels of the wheel set 8 for a vehicle speed between 0 and 10 km/h is less than 1250 N.m.
  • FIG. 3 shows a timing diagram of the combustion engine restart steps according to the invention. This chronogram is divided into three sub-chronograms for greater clarity, each of these three sub-chronograms having a reference whose abscissa axis is common, and represents the time.
  • the first sub-chronogram represents an altitude curve Ci of the vehicle in meters.
  • the vehicle is going to climb a climb which begins at time ti and ends at time t 7 .
  • the altitude at time t 7 is therefore greater than the altitude at time ti. It will be noted that between instant to and ti the vehicle is moving on a horizontal surface. In addition, between time to and t 7 the brake control device is not actuated by the driver.
  • the second sub-chronogram represents curves C 2 and C 3 .
  • the y-axis is double and represents:
  • the third sub-chronogram represents curves C 4 and C 5 .
  • the y-axis is double and represents:
  • the acceleration C 3 decreases becoming negative, until reaching at time t 3 the value of ⁇ 0.2 m/s 2 .
  • This value of -0.2 m/s 2 is the threshold acceleration of this example: the driver not actuating the brake control device, the conditions according to the invention are met for, at time t 3 , restart the combustion engine 1, which is done.
  • the restart time of the combustion engine 1 corresponding to the duration between the instant t 3 and the instant t 3 bis, the speed of the vehicle C 2 continues its decrease just like the acceleration C 3 , until the instant t 4 when the speed of the vehicle C 2 becomes zero while the vehicle is:
  • control device 18 comprises for example a means for controlling preventive comfort, filtering the torque setpoint at the wheel C 4 for example by smoothing the step or crenellation of the setpoint C 4 , so that the driver, like the mechanics, does not suffer a shock. This smoothing is not shown in FIG. 3. From time t 7 , the vehicle regains a horizontal rolling zone and the speed C 2 becomes constant while the acceleration C 3 becomes zero again.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention relates to a control device (18) for a vehicle comprising: a set of wheels (8), a combustion engine (1) and a non-thermal prime mover (9) configured to provide torque to the wheels (8), an electric motor (3) configured to restart the combustion engine (1), a brake control device coupled to a braking circuit of the vehicle, means for determining the current speed and the current acceleration of the vehicle, control means triggering the restarting of the combustion engine (1), when: the vehicle is running at a speed lower than a first threshold speed, and the vehicle is running with negative acceleration lower than a threshold acceleration, and the brake control device is not actuated by the driver.

Description

DESCRIPTION DESCRIPTION
TITRE : DISPOSITIF DE CONTROLE DE REDEMARRAGE D’UN MOTEUR A COMBUSTION D’UN VEHICULE HYBRIDE TITLE: RESTART CONTROL DEVICE FOR A COMBUSTION ENGINE OF A HYBRID VEHICLE
[001 ] La présente invention revendique la priorité de la demande française N°2009919 déposée le 29.09.2020 dont le contenu (te<te, dessins et revendications) est ici incorporé par référence. [001] The present invention claims the priority of French application No. 2009919 filed on 09.29.2020, the content of which (te <te, drawings and claims) is incorporated herein by reference.
[002] L’invention concerne les vĂ©hicules hybrides qui comprennent un moteur thermique et une machine motrice non-thermique consommant respectivement du carburant et de l’énergie (ou puissance) stockĂ©e dans au moins un moyen de stockage d’énergie pour fournir du couple, ensemble ou sĂ©parĂ©ment, pour au moins un train. [002] The invention relates to hybrid vehicles which comprise a thermal engine and a non-thermal driving machine respectively consuming fuel and energy (or power) stored in at least one energy storage means to provide torque , together or separately, for at least one train.
[003] On notera que l’invention concerne aussi bien les moyens de stockage d’énergie Ă©lectrique que les moyens de stockage d’énergie hydraulique ou pneumatique. Par ailleurs, l’invention concerne aussi bien le cas dans lequel le moteur thermique et la machine motrice non-thermique fournissent deux couples pour un mĂȘme train que le cas dans lequel le moteur thermique et la machine motrice non-thermique fournissent deux couples respectivement pour deux trains. [003] It will be noted that the invention relates both to electrical energy storage means and to hydraulic or pneumatic energy storage means. Furthermore, the invention concerns both the case in which the thermal engine and the non-thermal driving machine provide two torques for the same train and the case in which the thermal engine and the non-thermal driving machine provide two torques respectively for two trains.
[004] Certains vĂ©hicules hybrides, du type de ceux dĂ©finis ci-avant, disposent d’une fonction automatique dite de « marche rampante » (ou « rampage »), leur permettant de continuer Ă  se dĂ©placer sans Ă  coup Ă  faible vitesse (typiquement de 0 Ă  12 km/h sur le plat ou en pente) grĂące Ă  la fourniture d’un couple variable dĂšs que la vitesse du vĂ©hicule Ă©volue en-dessous d’un seuil et que le conducteur n’agit pas sur la pĂ©dale d’accĂ©lĂ©rateur. Ce mode de dĂ©placement (ou roulage), dit « mode de marche rampante » dans tout le texte de ce document, permet au conducteur de manƓuvrer plus facilement son vĂ©hicule en n’ayant besoin que de contrĂŽler le volant et d’actionner temporairement la pĂ©dale de frein. [004] Some hybrid vehicles, of the type defined above, have an automatic function known as "crawling" (or "crawling"), allowing them to continue to move smoothly at low speed (typically from 0 to 12 km/h on the flat or on a slope) thanks to the supply of a variable torque as soon as the speed of the vehicle changes below a threshold and the driver does not act on the pedal accelerator. This mode of travel (or driving), referred to as "crawling mode" throughout the text of this document, allows the driver to maneuver his vehicle more easily by only needing to control the steering wheel and temporarily operate the pedal. of brake.
[005] On connaĂźt du document de brevet WO-A1 -201938492 un dispositif de contrĂŽle anticipant le dĂ©marrage du moteur thermique de sorte Ă  assurer le mode de marche rampante lorsque, par exemple, la machine motrice non-thermique est dans l’incapacitĂ© d’assurer le mode de marche rampante Ă  elle seule selon l’état du moyen de stockage d’énergie. [006] Malheureusement ce dispositif de contrĂŽle prĂ©suppose que, en mode de marche rampante avec uniquement la machine motrice non thermique gĂ©nĂ©rant la propulsion, la puissance maximale que peut dĂ©livrer la machine motrice non thermique, indĂ©pendamment de l’état du stockage d’énergie, soit suffisante dans tous les cas de vie du vĂ©hicule en mode de marche rampante. Or il existe des vĂ©hicules hybrides qui comprennent une machine motrice non-thermique de faible capacitĂ©, dont la puissance ou le couple peut ĂȘtre insuffisant dans des situations de vie particuliĂšres du vĂ©hicule en mode de marche rampante, par exemple lorsque le vĂ©hicule est lourdement chargĂ© et/ou en pente, et provoquant un recul du vĂ©hicule pendant que le moteur Ă  combustion est redĂ©marrĂ©. [005] Patent document WO-A1-201938492 discloses a control device anticipating the start of the thermal engine so as to ensure the creeping mode when, for example, the non-thermal driving machine is unable to ensuring the creeping mode on its own according to the state of the energy storage means. [006] Unfortunately, this control device presupposes that, in creeping mode with only the non-thermal driving machine generating propulsion, the maximum power that the non-thermal driving machine can deliver, independently of the state of the energy storage, is sufficient in all cases of life of the vehicle in creeping mode. However, there are hybrid vehicles which include a low-capacity non-thermal driving machine, the power or torque of which may be insufficient in particular life situations of the vehicle in creeping mode, for example when the vehicle is heavily loaded and /or on a slope, and causing the vehicle to roll back while the combustion engine is restarted.
[007] Le but de l’invention est de remĂ©dier Ă  ce manque en proposant un dispositif de contrĂŽle adaptĂ© aux vĂ©hicules hybrides qui comprennent une machine motrice non-thermique de faible capacitĂ© sans qu’il y ait possibilitĂ© de recul de ces vĂ©hicules. [007] The object of the invention is to remedy this lack by proposing a control device suitable for hybrid vehicles which include a low-capacity non-thermal driving machine without there being any possibility of these vehicles rolling back.
[008] A cet effet, l’invention a pour objet un dispositif de contrĂŽle pour un vĂ©hicule, ce vĂ©hicule comprenant : [008] To this end, the subject of the invention is a control device for a vehicle, this vehicle comprising:
- un train de roues, - a wheel set,
- un moteur à combustion et une machine motrice non-thermique configurés pour fournir respectivement un couple aux roues, - a combustion engine and a non-thermal driving machine configured to supply torque to the wheels respectively,
- une machine électrique configurée pour un redémarrage du moteur à combustion, - an electric machine configured for restarting the combustion engine,
- un dispositif de commande de frein couplée à un circuit de freinage du véhicule,- a brake control device coupled to a braking circuit of the vehicle,
- un moyen de dĂ©termination de la vitesse en cours et de l’accĂ©lĂ©ration en cours du vĂ©hicule, ce vĂ©hicule Ă©tant en roulage dans un mode non thermique dans lequel le moteur Ă  combustion est Ă  l’arrĂȘt, ce dispositif de contrĂŽle comprenant des moyens de contrĂŽle dĂ©clenchant le redĂ©marrage du moteur Ă  combustion, lorsque : - means for determining the current speed and the current acceleration of the vehicle, this vehicle being driven in a non-thermal mode in which the combustion engine is stationary, this control device comprising means for control triggering the restart of the combustion engine, when:
- le véhicule roule à une vitesse inférieure à une premiÚre vitesse seuil, et- the vehicle is traveling at a speed lower than a first threshold speed, and
- le véhicule roule avec une accélération négative inférieure à une accélération seuil, et - the vehicle is rolling with a negative acceleration lower than a threshold acceleration, and
- le dispositif de commande de frein n’est pas actionnĂ© par le conducteur. - the brake control device is not actuated by the driver.
[009] Ainsi ce dispositif de contrĂŽle permet avantageusement de redĂ©marrer le moteur thermique avant que le vĂ©hicule ne prĂ©sente une vitesse de recul ou un dĂ©placement de recul, alors mĂȘme que ce vĂ©hicule est dans des conditions augmentant la probabilitĂ© d’apparition d’un recul. [010] En outre, ce dispositif de contrĂŽle Ă©vitera l’apparition d’un recul mĂȘme pour un vĂ©hicule hybride lĂ©ger, c’est-Ă -dire ayant la machine motrice non-thermique de faible capacitĂ©. Il n’est alors plus utile d’avoir une machine motrice non-thermique de forte capacitĂ©. [009] Thus this control device advantageously makes it possible to restart the heat engine before the vehicle exhibits a reversing speed or a reversing displacement, even though this vehicle is in conditions increasing the probability of occurrence of a reversal . [010] In addition, this control device will prevent the appearance of a recoil even for a light hybrid vehicle, that is to say having the low-capacity non-thermal driving machine. It is then no longer useful to have a high capacity non-thermal driving machine.
[011] Selon un mode de rĂ©alisation de l’invention, ce dispositif de contrĂŽle comprenant un moyen de contrĂŽle du vĂ©hicule en un mode de marche rampante, caractĂ©risĂ© en ce que la premiĂšre vitesse seuil est une vitesse maximale autorisĂ©e prĂ©dĂ©terminĂ©e du vĂ©hicule pour le mode de marche rampante. [011] According to one embodiment of the invention, this control device comprising means for controlling the vehicle in a creeping mode, characterized in that the first threshold speed is a predetermined maximum authorized speed of the vehicle for the mode creeping walk.
[012] En effet, le mode de marche rampante est un mode de marche du vĂ©hicule qui augmente la probabilitĂ© d’apparition d’un recul du vĂ©hicule. Il est alors judicieux, alors que le vĂ©hicule fonctionne en ce mode de marche rampante, que le dispositif de contrĂŽle soit tel que dĂ©crit, en prenant en compte la vitesse maximale autorisĂ©e prĂ©dĂ©terminĂ©e du vĂ©hicule pour le mode de marche rampante comme la premiĂšre vitesse seuil. [012] In fact, the creeping mode is a mode of vehicle operation which increases the probability of the appearance of a reversal of the vehicle. It is then judicious, while the vehicle is operating in this creep mode, that the control device be as described, taking into account the predetermined maximum authorized speed of the vehicle for the creep mode as the first threshold speed.
[013] Selon un mode de rĂ©alisation de l’invention, la premiĂšre vitesse seuil est notamment infĂ©rieure ou Ă©gale Ă  15 Km/h. [013] According to one embodiment of the invention, the first threshold speed is in particular less than or equal to 15 km/h.
[014] Selon un mode de rĂ©alisation de l’invention, la premiĂšre vitesse seuil est comprise entre 5 et 8 Km/h, notamment Ă©gale Ă  7 Km/h. [014] According to one embodiment of the invention, the first threshold speed is between 5 and 8 km/h, in particular equal to 7 km/h.
[015] Selon un mode de rĂ©alisation de l’invention, l’accĂ©lĂ©ration seuil est infĂ©rieure Ă  0 m/s2. [015] According to one embodiment of the invention, the threshold acceleration is less than 0 m/s 2 .
[016] Selon un mode de rĂ©alisation de l’invention, l’accĂ©lĂ©ration seuil est comprise entre 0 m/s2 et - 0,5 m/s2, notamment Ă©gale Ă  - 0,2 m/s2. [016] According to one embodiment of the invention, the threshold acceleration is between 0 m/s 2 and −0.5 m/s 2 , in particular equal to −0.2 m/s 2 .
[017] Selon un mode de rĂ©alisation de l’invention, le vĂ©hicule comprend un dispositif de frein de parking, et consĂ©cutivement Ă  ce redĂ©marrage, les moyens de contrĂŽle autorisent l’arrĂȘt du moteur Ă  combustion 1 si: [017] According to one embodiment of the invention, the vehicle includes a parking brake device, and following this restart, the control means authorize the stopping of the combustion engine 1 if:
- ce dispositif de frein de parking est actionné pour freiner le véhicule, ou, - this parking brake device is actuated to brake the vehicle, or,
- le véhicule roule à une vitesse supérieure à une seconde vitesse seuil, et avec une accélération supérieure ou égale à 0 m/s2. - the vehicle is traveling at a speed greater than a second threshold speed, and with an acceleration greater than or equal to 0 m/s 2 .
[018] Selon un mode de rĂ©alisation de l’invention, la seconde vitesse seuil est strictement supĂ©rieure Ă  la premiĂšre vitesse seuil. [018] According to one embodiment of the invention, the second threshold speed is strictly greater than the first threshold speed.
[019] En effet, cette caractĂ©ristique permet d’assurer une hystĂ©rĂ©sis entre le redĂ©marrage du moteur Ă  combustion 1 et l’autorisation d’arrĂȘt du moteur Ă  combustion 1. [020] L’invention a Ă©galement pour objet un vĂ©hicule comprenant : [019] Indeed, this characteristic makes it possible to ensure hysteresis between the restarting of the combustion engine 1 and the authorization to stop the combustion engine 1. [020] The invention also relates to a vehicle comprising:
- le train de roues, - the wheelset,
- le moteur à combustion et la machine motrice non-thermique configurés pour fournir respectivement des couples pour au moins le train de roues, - the combustion engine and the non-thermal driving machine configured to supply torques respectively for at least the wheel set,
- la machine électrique configurée pour un redémarrage du moteur à combustion,- the electrical machine configured for restarting the combustion engine,
- le dispositif de commande de frein couplée au circuit de freinage du véhicule,- the brake control device coupled to the vehicle braking circuit,
- le moyen de dĂ©termination de la vitesse en cours et de l’accĂ©lĂ©ration en cours du vĂ©hicule hybride, - the means for determining the current speed and the current acceleration of the hybrid vehicle,
- un dispositif de contrÎle tel que précédemment décrit. - A control device as previously described.
[021] Selon un mode de rĂ©alisation de l’invention, la machine motrice non- thermique est un moteur Ă©lectrique dont le couple maximal possible ramenĂ© aux roues du train de roues pour une vitesse du vĂ©hicule entre 0 et 10 km/h est infĂ©rieure Ă  1250 N.m. [021] According to one embodiment of the invention, the non-thermal driving machine is an electric motor whose maximum possible torque reduced to the wheels of the wheel set for a vehicle speed between 0 and 10 km/h is less than 1250 N.m.
[022] D’autres particularitĂ©s et avantages apparaĂźtront Ă  la lecture de la description ci-aprĂšs d’un mode particulier de rĂ©alisation, non limitatif de l’invention, faite en rĂ©fĂ©rence aux figures dans lesquelles : [022] Other features and advantages will appear on reading the description below of a particular, non-limiting embodiment of the invention, made with reference to the figures in which:
[023] [Fig 1] : La figure 1 , reprĂ©sente un schĂ©ma de l’architecture d’un vĂ©hicule hybride pour lequel l’invention est applicable. [023] [Fig 1]: Figure 1 shows a diagram of the architecture of a hybrid vehicle for which the invention is applicable.
[024] [Fig 2] : La figure 2 est un ensemble de courbes d’accĂ©lĂ©rations en fonction de la vitesse du vĂ©hicule illustrant la diffĂ©rence entre des vĂ©hicules hybrides non lĂ©gers et des vĂ©hicules hybrides lĂ©gers. [024] [Fig 2]: Figure 2 is a set of acceleration curves as a function of vehicle speed illustrating the difference between non-mild hybrid vehicles and mild hybrid vehicles.
[025] [Fig 3] : La figure 3 reprĂ©sente un chronogramme des actions de redĂ©marrage du moteur Ă  combustion selon l’invention. [025] [Fig 3]: Figure 3 shows a timing diagram of the combustion engine restart actions according to the invention.
[026] Il est Ă  garder Ă  l’esprit que les figures sont donnĂ©es Ă  titre d'exemples et ne sont pas limitatives de l’invention. Elles constituent des reprĂ©sentations schĂ©matiques de principe destinĂ©es Ă  faciliter la comprĂ©hension de l’invention et ne sont pas nĂ©cessairement Ă  l'Ă©chelle des applications pratiques. En outre, dans ce qui va suivre, il est fait rĂ©fĂ©rence Ă  toutes les figures prises en combinaison. Quand il est fait rĂ©fĂ©rence Ă  une ou des figures spĂ©cifiques, ces figures sont Ă  prendre en combinaison avec les autres figures pour la reconnaissance des rĂ©fĂ©rences numĂ©riques dĂ©signĂ©es. Les rĂ©fĂ©rences des Ă©lĂ©ments inchangĂ©s ou ayant la mĂȘme fonction sont communes Ă  toutes les figures, et les variantes de rĂ©alisation. [027] La figure 1 divulgue le schĂ©ma de l’architecture d’un vĂ©hicule hybride pour lequel l’invention est applicable. [026] It should be borne in mind that the figures are given by way of examples and do not limit the invention. They constitute schematic representations of principle intended to facilitate understanding of the invention and are not necessarily at the scale of practical applications. Furthermore, in what follows, reference is made to all the figures taken in combination. When reference is made to a specific figure or figures, these figures are to be taken in combination with the other figures for the recognition of the designated reference numerals. The references of the unchanged elements or having the same function are common to all the figures, and the variant embodiments. [027] Figure 1 discloses the diagram of the architecture of a hybrid vehicle for which the invention is applicable.
[028] Ce véhicule comprend un systÚme de motricité mécanique, un réseau de puissance électrique, et un réseau de bord électrique. [028] This vehicle includes a mechanical traction system, an electrical power network, and an electrical on-board network.
[029] Le systÚme de motricité mécanique comprend : [029] The mechanical traction system comprises:
- un moteur Ă  combustion 1 comprenant un vilebrequin 2, - a combustion engine 1 comprising a crankshaft 2,
- un premier moyen de couplage 11 , - a first coupling means 11,
- une machine électrique réversible 3 couplée au vilebrequin 2, par exemple à une premiÚre extrémité du vilebrequin 2, par le premier moyen de couplage 11 ,- a reversible electric machine 3 coupled to the crankshaft 2, for example at a first end of the crankshaft 2, by the first coupling means 11,
- une boßte de vitesses 4 couplée au vilebrequin 2, par exemple à une deuxiÚme extrémité du vilebrequin 2, - a gearbox 4 coupled to the crankshaft 2, for example to a second end of the crankshaft 2,
- un train de roues 8 couplé à la boßte de vitesses 4. la boßte de vitesses 4 comprend en outre : - a set of wheels 8 coupled to the gearbox 4. the gearbox 4 further comprises:
- un arbre primaire 6, - a primary shaft 6,
- un deuxiĂšme moyen de couplage 5 dĂ©brayable, par exemple un embrayage, couplant l’arbre primaire 6 Ă  la deuxiĂšme extrĂ©mitĂ© du vilebrequin 2, - a second disengageable coupling means 5, for example a clutch, coupling the primary shaft 6 to the second end of the crankshaft 2,
- un arbre secondaire 7 couplé au train de roues 8, - a secondary shaft 7 coupled to the wheel set 8,
- une machines motrices non thermique 9, par exemple une machine motrice électrique réversible 9, - a non-thermal driving machine 9, for example a reversible electric driving machine 9,
- un troisiùme moyen de couplage 10 couplant la machines motrices non thermique 9 à l’arbre primaire 6. - a third coupling means 10 coupling the non-thermal drive machinery 9 to the primary shaft 6.
[030] Ce troisiĂšme moyen de couplage 10 est par exemple un train d’engrenages. En variantes, la machines motrices non thermique 9 peut ĂȘtre couplĂ©e Ă  un deuxiĂšme train de roues alors que le moteur Ă  combustion est couplĂ© Ă  un premier train de roues distinct du deuxiĂšme, ou encore Ă  l’arbre secondaire 7 ou un arbre intermĂ©diaire de la boĂźte de vitesses 4. [030] This third coupling means 10 is for example a gear train. In variants, the non-thermal engine 9 can be coupled to a second set of wheels while the combustion engine is coupled to a first set of wheels distinct from the second, or even to the secondary shaft 7 or an intermediate shaft of the gearbox 4.
[031] La figure 1 illustre une unique machine motrice non thermique 9, mais ce n’est pas obligatoire et on peut avoir par exemple une premiĂšre machine motrice non thermique 9 couplĂ©e Ă  un train de roues avant du vĂ©hicule, le moteur Ă  combustion 1 Ă©tant Ă©galement couplĂ© Ă  ce mĂȘme train de roues avant, et une deuxiĂšme machine motrice non thermique 9 couplĂ©e Ă  un train de roues arriĂšres du vĂ©hicule. Le couple Ă  la roue sera alors la somme de chaque couple de la premiĂšre et deuxiĂšme machine motrice non thermique 9 multipliĂ© par un rapport de rĂ©duction ramenant le couple des machine motrice non thermique 9 Ă  la roue. [031] Figure 1 illustrates a single non-thermal driving machine 9, but this is not mandatory and one can have for example a first non-thermal driving machine 9 coupled to a front wheel set of the vehicle, the combustion engine 1 being also coupled to this same set of front wheels, and a second non-thermal driving machine 9 coupled to a set of rear wheels of the vehicle. The torque at the wheel will then be the sum of each torque of the first and second non-thermal driving machine 9 multiplied by a reduction ratio bringing the torque of the non-thermal driving machine 9 to the wheel.
[032] En variante, la machine Ă©lectrique rĂ©versible 3 est couplĂ©e au vilebrequin 2, par exemple Ă  la deuxiĂšme extrĂ©mitĂ© du vilebrequin 2 par le premier moyen de couplage 11 . Ce premier moyen de couplage 11 est par exemple une transmission par courroie. La machine Ă©lectrique rĂ©versible 3 est par exemple un alterno- dĂ©marreur permettant de redĂ©marrer le moteur Ă  combustion 1 , c’est-Ă -dire un court instant aprĂšs un prĂ©cĂ©dent arrĂȘt du moteur Ă  combustion 1 , infĂ©rieur Ă  10 minutes par exemple : L’huile du moteur Ă  combustion 1 est alors encore Ă  une tempĂ©rature plus Ă©levĂ©e qu’une tempĂ©rature ambiante, et dans ces conditions le redĂ©marrage est un dĂ©marrage Ă  chaud du moteur Ă  combustion 1 , par opposition Ă  un dĂ©marrage Ă  froid du moteur Ă  combustion 1 lorsque la tempĂ©rature de l’huile est Ă©gale Ă  la tempĂ©rature ambiante. [032] Alternatively, the reversible electric machine 3 is coupled to the crankshaft 2, for example to the second end of the crankshaft 2 by the first means of coupling 11 . This first coupling means 11 is for example a belt transmission. The reversible electric machine 3 is for example an alternator-starter making it possible to restart the combustion engine 1, that is to say a short time after a previous stoppage of the combustion engine 1, less than 10 minutes for example: oil of the combustion engine 1 is then still at a higher temperature than an ambient temperature, and under these conditions the restart is a hot start of the combustion engine 1, as opposed to a cold start of the combustion engine 1 when the oil temperature is equal to the ambient temperature.
[033] Le moteur à combustion 1 comprend, un démarreur 12 couplé au vilebrequin 2 et apte à démarrer la combustion notamment pour le démarrage à froid. [033] The combustion engine 1 comprises a starter 12 coupled to the crankshaft 2 and able to start the combustion in particular for the cold start.
[034] Le réseau de puissance électrique comprend : [034] The electrical power network includes:
- un moyen de stockage d’énergie motrice 13 pour la machine motrice non thermique 9, par exemple une batterie de propulsion 13 pour alimenter en courant la machine motrice Ă©lectrique rĂ©versible 9, - a drive energy storage means 13 for the non-thermal drive machine 9, for example a propulsion battery 13 to supply current to the reversible electric drive machine 9,
- un convertisseur de courant 14, par exemple du type continu-continu, - a current converter 14, for example of the DC-DC type,
- un faisceau de puissance 15 reliant Ă©lectriquement entre eux le moyen de stockage d’énergie motrice 13, la machine Ă©lectrique rĂ©versible 3, la machine motrice non thermique 9, et le convertisseur de courant 14. - a power harness 15 electrically interconnecting the drive energy storage means 13, the reversible electric machine 3, the non-thermal drive machine 9, and the current converter 14.
[035] Ce rĂ©seau de puissance Ă©lectrique est avantageusement le rĂ©seau puissance d’un vĂ©hicule hybride lĂ©ger, par exemple travaillant sous une tension de 48V. [035] This electrical power network is advantageously the power network of a light hybrid vehicle, for example working at a voltage of 48V.
[036] Le réseau de bord électrique comprend : [036] The electrical on-board network includes:
- le convertisseur de courant 14 faisant l’interface entre le rĂ©seau de bord Ă©lectrique et le rĂ©seau de puissance Ă©lectrique en transformant par exemple la tension de 48V en une tension de 12V pour le rĂ©seau de bord, - the current converter 14 acting as the interface between the electrical on-board network and the electrical power network by transforming, for example, the 48V voltage into a 12V voltage for the on-board network,
- une batterie de servitude 16, par exemple une batterie 12V, - a service battery 16, for example a 12V battery,
- des instruments de bord 17, - on-board instruments 17,
- un ou plusieurs dispositifs de contrĂŽle 18, agencĂ©s de sorte Ă  contrĂŽler le dĂ©marrage ou l’arrĂȘt du moteur Ă  combustion 1 , Ă  contrĂŽler la machine Ă©lectrique rĂ©versible 3, le convertisseur de courant 14, le deuxiĂšme moyen de couplage 5, la machine motrice non thermique 9, le moyen de stockage d’énergie motrice 13, la batterie de servitude 16. - one or more control devices 18, arranged so as to control the starting or stopping of the combustion engine 1, to control the reversible electric machine 3, the current converter 14, the second coupling means 5, the driving machine non-thermal 9, the motive energy storage means 13, the service battery 16.
- un faisceau de bord 19 reliant Ă©lectriquement entre eux le convertisseur de courant 14, la batterie de servitude 16, les instruments de bord 17, et le dispositif de contrĂŽle 18. - an edge harness 19 electrically connecting the converter to each other current 14, service battery 16, on-board instruments 17, and control device 18.
[037] Ce vĂ©hicule comprend Ă©galement un rĂ©seau de contrĂŽle commande, non reprĂ©sentĂ©, permettant d’échanger des informations et des commandes entre le dispositif de contrĂŽle 18 et les organes Ă  contrĂŽler prĂ©citĂ©s, ou entre des capteurs du vĂ©hicule et le dispositif de contrĂŽle 18. [037] This vehicle also includes a control command network, not shown, for exchanging information and commands between the control device 18 and the aforementioned organs to be controlled, or between vehicle sensors and the control device 18 .
[038] Ce véhicule comprend en outre : [038] This vehicle further comprises:
- un circuit de freinage du vĂ©hicule, agissant par exemple sur l’ensemble des roues du vĂ©hicule, - a vehicle braking circuit, acting for example on all the wheels of the vehicle,
- un dispositif de commande de frein couplée au circuit de freinage du véhicule, par exemple une pédale de frein, - a brake control device coupled to the braking circuit of the vehicle, for example a brake pedal,
- un moyen de dĂ©termination de la vitesse en cours et de l’accĂ©lĂ©ration en cours du vĂ©hicule, - a means of determining the current speed and the current acceleration of the vehicle,
- un dispositif de commande de vitesse du véhicule, par exemple couplé au dispositif de contrÎle 18 qui contrÎle le moteur à combustion 1 , ou la machine motrice non thermique 9, ou une combinaison des deux, pour produire un couple au roues du véhicule en fonction de la vitesse ou du couple demandé par le dispositif de commande de vitesse. - a vehicle speed control device, for example coupled to the control device 18 which controls the combustion engine 1, or the non-thermal driving machine 9, or a combination of the two, to produce a torque at the wheels of the vehicle depending speed or torque demanded by the speed control device.
[039] Ce dispositif de commande de vitesse du vĂ©hicule est par exemple une pĂ©dale d’accĂ©lĂ©ration, ou une commande au volant. [039] This vehicle speed control device is for example an accelerator pedal, or a steering wheel control.
[040] Ce vĂ©hicule comprend en outre un dispositif de frein de parking. Ce dispositif de frein de parking est par exemple un frein indĂ©pendant du circuit de freinage du vĂ©hicule, comme par exemple un frein Ă  main comprenant un levier actionnable par le conducteur et dont l’actionnement provoque un freinage d’un train de roues, prĂ©fĂ©rentiellement un train de roues arriĂšres du vĂ©hicule. Mais ce frein de parking peut Ă©galement ĂȘtre un systĂšme de blocage de l’arbre secondaire de la boĂźte de vitesse 4, comprenant des mĂąchoires crantĂ©es solidaires du carter de la boĂźte de vitesses et se refermant sur une couronne crantĂ©e de l’arbre secondaire. [040] This vehicle further comprises a parking brake device. This parking brake device is for example a brake independent of the braking circuit of the vehicle, such as for example a handbrake comprising a lever operable by the driver and the actuation of which causes braking of a set of wheels, preferably a rear wheel set of the vehicle. But this parking brake can also be a system for locking the secondary shaft of gearbox 4, comprising notched jaws integral with the housing of the gearbox and closing on a toothed crown of the secondary shaft.
[041 ] Le dispositif de contrĂŽle 18 comprend des moyens de contrĂŽles. Ces moyens de contrĂŽle sont par exemple un ensemble comprenant un calculateur de supervision, et un ou plusieurs calculateurs spĂ©cifiques couplĂ©s au calculateur de supervision via un bus de donnĂ©es de type CAN pour l’acronyme anglais « Controller Area Network ». Ces calculateurs comprennent des moyens d’acquisition, de traitement par instructions logicielles stockĂ©es dans une mĂ©moire ainsi que les moyens de commande requis Ă  mise en Ɠuvre d’un procĂ©dĂ©. [042] Mais en variante ces calculateurs peuvent ĂȘtre regroupĂ©s en un unique calculateur. [041] The control device 18 includes control means. These control means are for example an assembly comprising a supervision computer, and one or more specific computers coupled to the supervision computer via a data bus of the CAN type for the English acronym “Controller Area Network”. These computers include means for acquisition, processing by software instructions stored in a memory as well as the control means required to implement a method. [042] But as a variant, these computers can be grouped together in a single computer.
[043] L’invention proposera donc de mettre en Ɠuvre, au sein du vĂ©hicule, un procĂ©dĂ© destinĂ© Ă  contrĂŽler le redĂ©marrage du moteur Ă  combustion 1 . [043] The invention will therefore propose to implement, within the vehicle, a method intended to control the restarting of the combustion engine 1 .
[044] Cette mise en Ɠuvre peut se faire au moyen du dispositif de contrĂŽle 18. Par consĂ©quent, un dispositif de contrĂŽle 18, selon l’invention, peut ĂȘtre rĂ©alisĂ© sous la forme de modules logiciels (ou informatiques (ou encore « software »)), ou bien de circuits Ă©lectroniques (ou « hardware »), ou encore d’une combinaison de circuits Ă©lectroniques et de modules logiciels. [044] This implementation can be done by means of the control device 18. Consequently, a control device 18, according to the invention, can be produced in the form of software (or computer (or even “software”) modules )), or electronic circuits (or “hardware”), or a combination of electronic circuits and software modules.
[045] On comprendra par batterie, dans tout le texte de ce document, un ensemble comprenant au moins un module de batterie contenant au moins une cellule Ă©lectrochimique, la batterie de servitude Ă©tant considĂ©rĂ©e Ă©quivalente Ă  au moins un module. Cette batterie comprend Ă©ventuellement des moyens Ă©lectriques ou Ă©lectroniques pour la gestion d’énergie Ă©lectrique de ce au moins un module. Lorsqu’il y a plusieurs modules, ils sont regroupĂ©s dans un carter et forment alors un bloc batterie, ce bloc batterie Ă©tant souvent dĂ©signĂ© par l’expression anglaise « pack batteries », ce carter contenant gĂ©nĂ©ralement une interface de montage, et des bornes de raccordement. De la mĂȘme façon, lorsqu’il y a plusieurs cellules, elles sont regroupĂ©es dans un carter et forment alors un module de batterie, le mot carter dĂ©signant dans tout le texte de ce document indiffĂ©remment le carter du module ou du bloc batterie. [045] The term battery will be understood throughout the text of this document to mean an assembly comprising at least one battery module containing at least one electrochemical cell, the service battery being considered equivalent to at least one module. This battery optionally comprises electrical or electronic means for managing the electrical energy of this at least one module. When there are several modules, they are grouped together in a housing and then form a battery block, this battery block being often designated by the English expression "battery pack", this housing generally containing a mounting interface, and terminals for connection. In the same way, when there are several cells, they are grouped together in a casing and then form a battery module, the word casing designating throughout the text of this document indifferently the casing of the module or of the battery block.
[046] Par ailleurs, on comprendra par cellule électrochimique dans tout le texte de ce document, des cellules générant du courant par réaction chimique, par exemple de type lithium-ion (ou Li-ion), de type Ni-Mh, ou Ni-Cd ou encore plomb. [046] Furthermore, the term electrochemical cell will be understood throughout the text of this document to mean cells generating current by chemical reaction, for example of the lithium-ion (or Li-ion) type, of the Ni-Mh type, or Ni -Cd or even lead.
[047] Les vĂ©hicules hybrides utilisent en gĂ©nĂ©ral des machines motrices non thermique, notamment des machines motrices Ă©lectriques, aptes Ă  gĂ©nĂ©rer un couple maximal de 2000 Ă  2500 N.m Ă  la roue, entre 0 et 12 km/h, ce qui permet au vĂ©hicule de gravir des pentes au-delĂ  de 25% Ă  la seule force de la machine motrice Ă©lectrique. Un tel couple maximal exclue ces vĂ©hicules du domaine des hybrides lĂ©gers, dont la machine motrice non thermique 9, ici une machine Ă©lectrique motrice, est gĂ©nĂ©ralement alimentĂ©e par une tension de 48V et dont le couple gĂ©nĂ©rĂ© maximal Ă  la roue est deux fois moindre pour cette mĂȘme plage de vitesses, de 1000 Ă  1250 N.m, ce qui implique de potentiels reculs en pente du vĂ©hicule lorsqu’il avance Ă  la seule force de la machine motrice non thermique 9, le temps que le moteur Ă  combustion 1 redĂ©marre et puisse tracter le vĂ©hicule. [048] La figure 2 illustre la diffĂ©rence entre les vĂ©hicules hybrides et les vĂ©hicules hybrides lĂ©gers, en reprĂ©sentant les consĂ©quences dynamiques sur le vĂ©hicule en fonction de sa vitesse. [047] Hybrid vehicles generally use non-thermal drive machines, in particular electric drive machines, capable of generating a maximum torque of 2000 to 2500 Nm at the wheel, between 0 and 12 km/h, which allows the vehicle to climb slopes greater than 25% using only the power of the electric motor. Such a maximum torque excludes these vehicles from the field of mild hybrids, whose non-thermal driving machine 9, here an electric driving machine, is generally powered by a voltage of 48V and whose maximum torque generated at the wheel is half as much for this same speed range, from 1000 to 1250 Nm, which implies potential reversals on a slope of the vehicle when it advances solely by the force of the non-thermal driving machine 9, the time for the combustion engine 1 to restart and be able to tow the vehicle. [048] Figure 2 illustrates the difference between hybrid vehicles and mild hybrid vehicles, representing the dynamic consequences on the vehicle depending on its speed.
[049] L’axe des abscisses est la vitesse du vĂ©hicule en Km/h, l’axe des ordonnĂ©es est l’accĂ©lĂ©ration longitudinale maximale, en m/s2, du vĂ©hicule : [049] The abscissa axis is the vehicle speed in Km/h, the ordinate axis is the maximum longitudinal acceleration, in m/s 2 , of the vehicle:
- sur une surface de roulage horizontale, - on a horizontal rolling surface,
- et avec uniquement la machine motrice non thermique générant la propulsion. - and with only the non-thermal driving machine generating the propulsion.
[050] Cette figure montre deux zones distinctes : [050] This figure shows two distinct zones:
- une premiÚre zone Z1 , dans laquelle on retrouve les caractéristiques des véhicules hybrides non légers, par exemple une accélération maximale entre 1 ,5 et 4,75 m/s2 pour une vitesse entre 0 et 20 Km/h, - a first zone Z1, in which we find the characteristics of non-light hybrid vehicles, for example a maximum acceleration between 1.5 and 4.75 m/s 2 for a speed between 0 and 20 km/h,
- une deuxiÚme zone Z2, dont les accélérations longitudinales maximales sont toutes bien inférieures à la zone Z1 , caractéristique des véhicules hybrides légers, par exemple entre 0,5 et 1 ,15 m/s2 pour une vitesse comprise entre 0 et 16 Km/h. - a second zone Z2, whose maximum longitudinal accelerations are all much lower than zone Z1, characteristic of light hybrid vehicles, for example between 0.5 and 1.15 m/s 2 for a speed between 0 and 16 km/ h.
[051 ] Cette probabilitĂ© de recul non dĂ©sirĂ© de ce vĂ©hicule hybride lĂ©ger augmente encore lorsqu’il Ă©volue Ă  vitesse trĂšs faible car dans cette condition le vĂ©hicule est dĂ©jĂ  trĂšs proche d’une vitesse de recul et le temps de redĂ©marrer le moteur Ă  combustion 1 sera plus long que le temps de bascule de la vitesse en marche avant Ă  marche arriĂšre. [051] This probability of unwanted recoil of this light hybrid vehicle increases further when it moves at very low speed because in this condition the vehicle is already very close to a recoil speed and the time to restart the combustion engine 1 will be longer than the changeover time from forward to reverse.
Par exemple, un temps de redĂ©marrage du moteur Ă  combustion 1 de 0,7 seconde (temps entre l’ordre de redĂ©marrage et l’instant ou le moteur est apte Ă  fournir du couple pour la motricitĂ© du vĂ©hicule) suffira Ă  provoquer un recul du vĂ©hicule s’il est combinĂ© Ă  : For example, a combustion engine 1 restart time of 0.7 seconds (time between the restart command and the instant when the engine is able to supply torque for the traction of the vehicle) will be sufficient to cause the vehicle if combined with:
- une pente de 9% de la surface de roulage du véhicule, en montée, - a slope of 9% of the rolling surface of the vehicle, uphill,
- une vitesse initiale nulle du véhicule hybride léger, - zero initial speed of the light hybrid vehicle,
- un couple maximal de 1000 N.m disponible par la machine motrice non thermique 9. - a maximum torque of 1000 N.m available from the non-thermal driving machine 9.
[052] Bien entendu, on comprendra par recul du véhicule, dans tout le texte de ce document, un déplacement du véhicule en sens inverse du sens de marche sélectionné du véhicule: Si une vitesse de marche avant est sélectionnée, le recul correspond à un déplacement en arriÚre du véhicule et si la marche arriÚre est sélectionnée, le recul correspond à un déplacement du véhicule en marche avant. [052] Of course, the term reversal of the vehicle will be understood throughout the text of this document to mean a movement of the vehicle in the opposite direction to the selected direction of travel of the vehicle: If a forward speed is selected, the reversal corresponds to a movement of the vehicle backwards and if reverse gear is selected, reversing corresponds to movement of the vehicle in forward gear.
[053] On comprendra par accélération négative, dans tout le texte de ce document, une diminution de la vitesse du véhicule se déplaçant dans le sens de marche sélectionné du véhicule, ou une augmentation de la vitesse du véhicule se déplaçant dans le sens opposé de celui du sens de marche sélectionné du véhicule. [053] Negative acceleration will be understood throughout the text of this document to mean a decrease in the speed of the vehicle moving in the selected direction of travel of the vehicle, or an increase in the speed of the vehicle moving moving in the opposite direction to that of the selected direction of travel of the vehicle.
[054] Cette possibilité de recul se retrouve en particulier lorsque ce véhicule hybride léger : [054] This possibility of setback is found in particular when this mild hybrid vehicle:
- Ă©volue dans le mode de marche rampante prĂ©cĂ©demment dĂ©crit, c’est-Ă -dire permettant de continuer Ă  dĂ©placer le vĂ©hicule sans Ă  coup Ă  faible vitesse, par exemple infĂ©rieure ou Ă©gale Ă  7 Km/h sur le plat ou en montĂ©e, grĂące Ă  la fourniture d’un couple variable dĂšs que la vitesse du vĂ©hicule Ă©volue en-dessous d’un seuil et que le conducteur n’agit pas sur la pĂ©dale d’accĂ©lĂ©rateur, - evolves in the creeping mode previously described, that is to say allowing the vehicle to continue to move smoothly at low speed, for example less than or equal to 7 km/h on the flat or uphill, thanks to the supply of a variable torque as soon as the speed of the vehicle changes below a threshold and the driver does not act on the accelerator pedal,
- et que le vĂ©hicule est dans un mode moteur initial 100% non thermique oĂč seule la machine motrice non thermique 9 fournie du couple pour la motricitĂ©, le moteur Ă  combustion 1 Ă©tant Ă  l’arrĂȘt. - and that the vehicle is in a 100% non-thermal initial engine mode where only the non-thermal driving machine 9 provides torque for traction, the combustion engine 1 being stopped.
[055] On comprendra dans tout le texte de ce document que, si le véhicule comprend plusieurs machines motrices non thermiques 9, le couple pour la motricité à considérer est la somme des couples de chaque machines motrices non thermiques 9. [055] It will be understood throughout the text of this document that, if the vehicle comprises several non-thermal driving machines 9, the torque for the traction to be considered is the sum of the torques of each non-thermal driving machines 9.
[056] En outre, le couple Ă  la roue, ou au train de roues, quel que soit le nombre de roues motrices, est la somme des couples de chaque machines motrices non thermiques 9 multipliĂ© par un rapport de transmission entre l’arbre de sortie de chaque machine motrice non thermique et l’arbre d’une ou des roues. Selon la figure 1 , qui illustre une unique machine motrice non thermique 9, ce rapport de transmission inclue donc le rapport d’une vitesse la plus courte de la boĂźte de vitesses 4, le rapport du troisiĂšme moyen de couplage, et le rapport d’un diffĂ©rentiel (non reprĂ©sentĂ©) intĂ©grĂ© ou non Ă  la boĂźte de vitesses 4. [056] In addition, the torque at the wheel, or at the wheel set, regardless of the number of driving wheels, is the sum of the torques of each non-thermal driving machine 9 multiplied by a transmission ratio between the shaft of output of each non-thermal driving machine and the shaft of one or more wheels. According to Figure 1, which illustrates a single non-thermal driving machine 9, this transmission ratio therefore includes the ratio of the shortest speed of the gearbox 4, the ratio of the third coupling means, and the ratio of a differential (not shown) whether or not integrated into the gearbox 4.
[057] On notera en effet que le couple maximal Ă  la roue selon l’architecture de l’exemple de la figure 1 est obtenu avec le rapport le plus court engagĂ© de la boĂźte de vitesses. Mais d’autres exemples d’architecture sont possibles, par exemple une unique machine motrices non thermiques 9 entraĂźnant un train de roues arriĂšre du vĂ©hicule, par l’intermĂ©diaire d’un simple rĂ©ducteur Ă  une vitesse, intĂ©grant ou non le diffĂ©rentiel : dans ce cas na notion de rapport le plus court ne s’applique pas puisqu’il n’y a qu’un unique rapport de rĂ©duction. [057] It will in fact be noted that the maximum torque at the wheel according to the architecture of the example in FIG. 1 is obtained with the shortest gear engaged of the gearbox. But other examples of architecture are possible, for example a single non-thermal driving machine 9 driving a set of rear wheels of the vehicle, via a simple single-speed reduction gear, whether or not integrating the differential: in this case the notion of the shortest ratio does not apply since there is only one reduction ratio.
[058] Selon l’invention, le dispositif de contrĂŽle 18 illustrĂ© dans l’exemple non limitatif de la figure 1 est configurĂ© pour un vĂ©hicule, ce vĂ©hicule comprenant :[058] According to the invention, the control device 18 illustrated in the non-limiting example of Figure 1 is configured for a vehicle, this vehicle comprising:
- le train de roues 8, - the wheel set 8,
- le moteur à combustion 1 et la machine motrice non-thermique 9 configurés pour fournir un couple aux roues 8, - la machine électrique 3 configurée pour le redémarrage du moteur à combustion 1 , - the combustion engine 1 and the non-thermal driving machine 9 configured to supply a torque to the wheels 8, - the electric machine 3 configured for restarting the combustion engine 1,
- le dispositif de commande de frein couplée au circuit de freinage du véhicule,- the brake control device coupled to the vehicle braking circuit,
- le moyen de dĂ©termination de la vitesse en cours et de l’accĂ©lĂ©ration en cours du vĂ©hicule. - the means of determining the current speed and the current acceleration of the vehicle.
[059] Ce vĂ©hicule Ă©tant en roulage dans le mode non thermique dans lequel le moteur Ă  combustion 1 est Ă  l’arrĂȘt, ce dispositif de contrĂŽle 18 comprend les moyens de contrĂŽle dĂ©clenchant le redĂ©marrage du moteur Ă  combustion 1 , lorsque : [059] This vehicle being driven in the non-thermal mode in which the combustion engine 1 is stopped, this control device 18 comprises the control means triggering the restart of the combustion engine 1, when:
- le véhicule roule à une vitesse inférieure à une premiÚre vitesse seuil, et - the vehicle is traveling at a speed lower than a first threshold speed, and
- le véhicule roule avec une accélération négative inférieure à une accélération seuil, et - the vehicle is rolling with a negative acceleration lower than a threshold acceleration, and
- le dispositif de commande de frein n’est pas actionnĂ© par le conducteur. - the brake control device is not actuated by the driver.
[060] Ce dispositif de contrÎle 18 comprend un moyen de contrÎle du véhicule avec le mode de marche rampante, et la premiÚre vitesse seuil est une vitesse maximale autorisée prédéterminée du véhicule pour le mode de marche rampante. [060] This control device 18 comprises means for controlling the vehicle with the creep mode, and the first threshold speed is a predetermined maximum authorized speed of the vehicle for the creep mode.
[061 ] La premiĂšre vitesse seuil est par exemple infĂ©rieure ou Ă©gale Ă  15 Km/h. Elle peut ĂȘtre comprise entre 5 et 8 Km/h, notamment Ă©gale Ă  7 Km/h comme illustrĂ© sur la figure 3. [061] The first threshold speed is for example less than or equal to 15 km/h. It can be between 5 and 8 km/h, in particular equal to 7 km/h as illustrated in FIG. 3.
[062] L’accĂ©lĂ©ration seuil est infĂ©rieure Ă  0 m/s2. [062] The threshold acceleration is less than 0 m/s 2 .
[063] L’accĂ©lĂ©ration seuil est par exemple comprise entre 0 m/s2 et - 0,5 m/s2, notamment Ă©gale Ă  - 0,2 m/s2 comme illustrĂ© sur la figure 3. [063] The threshold acceleration is for example between 0 m/s 2 and - 0.5 m/s 2 , in particular equal to - 0.2 m/s 2 as illustrated in FIG. 3.
[064] Le vĂ©hicule comprend le dispositif de frein de parking, et consĂ©cutivement Ă  ce redĂ©marrage, les moyens de contrĂŽle autorisent l’arrĂȘt du moteur Ă  combustion 1 si: [064] The vehicle includes the parking brake device, and following this restart, the control means authorize the stopping of the combustion engine 1 if:
- ce dispositif de frein de parking est actionné pour freiner le véhicule, ou, - this parking brake device is actuated to brake the vehicle, or,
- le véhicule roule à une vitesse supérieure à une seconde vitesse seuil, et avec une accélération positive supérieure ou égale à 0 m/s2. - the vehicle is traveling at a speed greater than a second threshold speed, and with a positive acceleration greater than or equal to 0 m/s 2 .
[065] La seconde vitesse seuil est par exemple supĂ©rieure Ă  la premiĂšre vitesse seuil, de sorte Ă  assurer une hystĂ©rĂ©sis entre le redĂ©marrage du moteur Ă  combustion 1 et l’autorisation d’arrĂȘt du moteur Ă  combustion 1 . Par exemple, la seconde vitesse seuil est comprise entre 103% et 150% de la premiĂšre vitesse seuil. Par exemple la seconde vitesse seuil est comprise entre 103% et 115% de la premiĂšre vitesse seuil. Plus prĂ©cisĂ©ment, la premiĂšre vitesse seuil Ă©tant de 7Km/h, la seconde vitesse seuil sera par exemple de 8 Km/h. [066] Ce vĂ©hicule comprend le dispositif de contrĂŽle 18. [065] The second threshold speed is for example greater than the first threshold speed, so as to ensure hysteresis between the restarting of the combustion engine 1 and the authorization to stop the combustion engine 1 . For example, the second threshold speed is between 103% and 150% of the first threshold speed. For example, the second threshold speed is between 103% and 115% of the first threshold speed. More precisely, the first threshold speed being 7 km/h, the second threshold speed will be for example 8 km/h. [066] This vehicle includes the control device 18.
[067] La machine motrice non-thermique 9 est un moteur électrique dont le couple maximal possible ramené aux roues du train de roues 8 pour une vitesse du véhicule entre 0 et 10 km/h est inférieure à 1250 N.m. [067] The non-thermal driving machine 9 is an electric motor whose maximum possible torque reduced to the wheels of the wheel set 8 for a vehicle speed between 0 and 10 km/h is less than 1250 N.m.
[068] La figure 3 reprĂ©sente un chronogramme des Ă©tapes de redĂ©marrage du moteur Ă  combustion selon l’invention. Ce chronogramme est divisĂ© en trois sous- chronogrammes pour plus de clartĂ©, chacun de ces trois sous-chronogramme ayant un repĂšre dont l’axe des abscisses est commun, et reprĂ©sente le temps. [068] Figure 3 shows a timing diagram of the combustion engine restart steps according to the invention. This chronogram is divided into three sub-chronograms for greater clarity, each of these three sub-chronograms having a reference whose abscissa axis is common, and represents the time.
[069] Le premier sous-chronogramme reprĂ©sente une courbe Ci d’altitude du vĂ©hicule en mĂštres. Dans cet exemple le vĂ©hicule va gravir une montĂ©e qui dĂ©bute Ă  l’instant ti et se termine Ă  l’instant t7. L’altitude Ă  l’instant t7 est donc plus grande que l’altitude Ă  l’instant ti. On notera qu’entre l’instant to et ti le vĂ©hicule Ă©volue sur une surface horizontale. En outre, entre l’instant to et t7 le dispositif de commande de frein n’est pas actionnĂ© par le conducteur. [069] The first sub-chronogram represents an altitude curve Ci of the vehicle in meters. In this example the vehicle is going to climb a climb which begins at time ti and ends at time t 7 . The altitude at time t 7 is therefore greater than the altitude at time ti. It will be noted that between instant to and ti the vehicle is moving on a horizontal surface. In addition, between time to and t 7 the brake control device is not actuated by the driver.
[070] Le deuxiĂšme sous-chronogramme reprĂ©sente des courbes C2 et C3. L’axe des ordonnĂ©es est double et reprĂ©sente : [070] The second sub-chronogram represents curves C 2 and C 3 . The y-axis is double and represents:
- l’accĂ©lĂ©ration du vĂ©hicule par la courbe C3, en pointillĂ©s, et - the acceleration of the vehicle by the curve C 3 , in dotted lines, and
- la vitesse du véhicule par la courbe C2 en trait plein, en fonction du temps. - the speed of the vehicle by the curve C 2 in solid line, as a function of time.
[071 ] Le troisiĂšme sous-chronogramme reprĂ©sente des courbes C4 et C5. L’axe des ordonnĂ©es est double et reprĂ©sente : [071] The third sub-chronogram represents curves C 4 and C 5 . The y-axis is double and represents:
- la consigne en couple à la roue demandé par le conducteur via le dispositif de commande de vitesse, pour la courbe C4 en pointillés, - the torque setpoint at the wheel requested by the driver via the speed control device, for curve C 4 in dotted lines,
- et le couple à la roue réellement obtenu, pour la courbe C5, en trait plein. - And the torque at the wheel actually obtained, for curve C 5 , in a solid line.
[072] On constate qu’entre l’instant to et ti la vitesse C2 est constante, Ă  7 Km/h ce qui reprĂ©sente par exemple la premiĂšre vitesse seuil. La vitesse C2 Ă©tant constante entre to et ti , l’accĂ©lĂ©ration C3 est nulle. [072] It can be seen that between the instant to and ti the speed C 2 is constant, at 7 km/h which represents for example the first threshold speed. The speed C 2 being constant between to and ti , the acceleration C 3 is zero.
[073] A l’instant ti , le vĂ©hicule aborde la montĂ©e et instinctivement le conducteur va actionner lĂ©gĂšrement et progressivement le dispositif de commande de vitesse de l’instant ti Ă  t2 puis garder sa consigne de couple Ă  la roue C4 constante jusqu’à t4. De to Ă  t4 la consigne en couple Ă  la roue C4 ne dĂ©passe pas la capacitĂ© maximale de la machine motrice non thermique 9, si bien qu’à elle seule, le moteur Ă  combustion 1 Ă©tant Ă  l’arrĂȘt, la machine motrice non thermique 9 permet de satisfaire pleinement la consigne en couple Ă  la roue demandĂ© par le conducteur C4, les courbes C4 et C5 sont confondues. Cependant, Ă  partir de l’instant ti la vitesse du vĂ©hicule C2 commence Ă  diminuer malgrĂ© l’action prĂ©cĂ©dente du conducteur sur le dispositif de commande de vitesse. Naturellement Ă  partir de ti l’accĂ©lĂ©ration C3 diminue en devenant nĂ©gative, jusqu’à atteindre Ă  l’instant t3 la valeur de -0,2 m/s2. Cette valeur de -0,2 m/s2 est l’accĂ©lĂ©ration seuil de cet exemple : le conducteur n’actionnant pas le dispositif de commande de frein, les conditions selon l’invention sont rĂ©unies pour, Ă  l’instant t3, redĂ©marrer le moteur Ă  combustion 1 , ce qui est fait. Pendant le temps de redĂ©marrage du moteur Ă  combustion 1 correspondant Ă  la durĂ©e entre l’instant t3 et l’instant t3bis, la vitesse du vĂ©hicule C2 continue sa dĂ©croissance tout comme l’accĂ©lĂ©ration C3, jusqu’à l’instant t4 oĂč la vitesse du vĂ©hicule C2 devient nulle alors que le vĂ©hicule est : [073] At time ti, the vehicle approaches the climb and instinctively the driver will slightly and gradually activate the speed control device from time ti to t 2 then keep its torque setpoint at wheel C 4 constant until at t 4 . From to to t 4 the torque setpoint at the wheel C 4 does not exceed the maximum capacity of the non-thermal driving machine 9, so that by itself, the combustion engine 1 being stopped, the driving machine non-thermal 9 makes it possible to fully satisfy the torque setpoint at the wheel requested by the driver C 4 , the curves C 4 and C 5 coincide. However, from time ti the speed of vehicle C 2 begins to decrease despite the driver's previous action on the speed control device. Naturally from ti the acceleration C 3 decreases becoming negative, until reaching at time t 3 the value of −0.2 m/s 2 . This value of -0.2 m/s 2 is the threshold acceleration of this example: the driver not actuating the brake control device, the conditions according to the invention are met for, at time t 3 , restart the combustion engine 1, which is done. During the restart time of the combustion engine 1 corresponding to the duration between the instant t 3 and the instant t 3 bis, the speed of the vehicle C 2 continues its decrease just like the acceleration C 3 , until the instant t 4 when the speed of the vehicle C 2 becomes zero while the vehicle is:
- dans la montée, - in the climb,
- et le dispositif de commande de frein n’est pas actionnĂ©. - and the brake control device is not activated.
[074] Mais Ă  cet instant t4, le moteur Ă  combustion 1 a terminĂ© son redĂ©marrage, et via le pilotage du deuxiĂšme moyen de couplage 5 dĂ©brayable par le dispositif de contrĂŽle 18, le couple du moteur Ă  combustion 1 est disponible depuis l’instant t3bis. [074] But at this time t 4 , the combustion engine 1 has finished restarting, and via the control of the second coupling means 5 disengageable by the control device 18, the torque of the combustion engine 1 is available from the moment t3bis.
[075] A l’instant t4, le conducteur ne voulant pas reculer, il augmente sa consigne de couple Ă  la roue C4 de façon brutale, la consigne C4 prenant alors la forme d’un Ă©chelon ou crĂ©neau. A cet instant t4, la consigne de couple C4 dĂ©passe les capacitĂ©s maximales de la machine motrice non thermique 9, mais le dispositif de contrĂŽle 18 contrĂŽle le deuxiĂšme moyen de couplage 5 dĂ©brayable en l’embrayant, de sorte que le couple du moteur Ă  combustion 1 s’additionne au couple de la machine motrice non thermique 9 : parce que le moteur Ă  combustion 1 a prĂ©alablement Ă©tĂ© redĂ©marrĂ© Ă  l’instant t3, le vĂ©hicule a la cĂ©lĂ©ritĂ© nĂ©cessaire (accĂ©lĂ©ration rapide C3 Ă  l’instant t4) pour rĂ©pondre Ă  la demande du conducteur et le vĂ©hicule n’a pas le temps de reculer. AprĂšs l’instant t4, la vitesse C2 remonte en passant par t5 et t6 jusqu’à atteindre un palier Ă  l’instant t7 pendant que l’accĂ©lĂ©ration C3 reste constante. En outre, AprĂšs l’instant t4, on constate que le couple Ă  la roue C5 progresse selon une rampe linĂ©aire avant d’arriver Ă  une valeur constante : En effet, le dispositif de contrĂŽle 18 comprend par exemple un moyen de contrĂŽle de confort prĂ©ventif, filtrant la consigne de couple Ă  la roue C4 par exemple en lissant l’échelon ou crĂ©neau de la consigne C4, de sorte que le conducteur, comme la mĂ©canique, ne subissent pas un choc. Ce lissage n’est pas reprĂ©sentĂ© sur la figure 3. A partie de l’instant t7, le vĂ©hicule retrouve une zone de roulage horizontale et la vitesse C2 devient constante alors que l’accĂ©lĂ©ration C3 redevient nulle. [075] At time t 4 , the driver not wanting to move back, he increases his torque setpoint at the wheel C 4 abruptly, the setpoint C 4 then taking the form of a step or slot. At this time t 4 , the torque setpoint C 4 exceeds the maximum capacities of the non-thermal driving machine 9, but the control device 18 controls the second disengageable coupling means 5 by engaging it, so that the engine torque combustion engine 1 is added to the torque of the non-thermal driving machine 9: because the combustion engine 1 has previously been restarted at time t 3 , the vehicle has the necessary speed (rapid acceleration C 3 at time t 4 ) to respond to the driver's request and the vehicle does not have time to back up. After time t 4 , speed C 2 rises, passing through t 5 and t 6 until it reaches a plateau at time t 7 while acceleration C 3 remains constant. In addition, after time t 4 , it can be seen that the torque at wheel C 5 progresses according to a linear ramp before arriving at a constant value: Indeed, the control device 18 comprises for example a means for controlling preventive comfort, filtering the torque setpoint at the wheel C 4 for example by smoothing the step or crenellation of the setpoint C 4 , so that the driver, like the mechanics, does not suffer a shock. This smoothing is not shown in FIG. 3. From time t 7 , the vehicle regains a horizontal rolling zone and the speed C 2 becomes constant while the acceleration C 3 becomes zero again.

Claims

REVENDICATIONS
1. Dispositif de contrÎle (18) pour un véhicule, ce véhicule comprenant : 1. Control device (18) for a vehicle, this vehicle comprising:
- un train de roues (8), - a set of wheels (8),
- un moteur à combustion (1 ) et une machine motrice non-thermique (9) configurés pour fournir un couple aux roues (8), - a combustion engine (1) and a non-thermal driving machine (9) configured to supply torque to the wheels (8),
- une machine électrique (3) configurée pour un redémarrage du moteur à combustion (1 ),- an electric machine (3) configured for restarting the combustion engine (1),
- un dispositif de commande de frein couplée à un circuit de freinage du véhicule, - a brake control device coupled to a braking circuit of the vehicle,
- un moyen de dĂ©termination de la vitesse en cours et de l’accĂ©lĂ©ration en cours du vĂ©hicule, caractĂ©risĂ© en ce que, ce vĂ©hicule Ă©tant en roulage dans un mode non thermique dans lequel le moteur Ă  combustion (1 ) est Ă  l’arrĂȘt, ce dispositif de contrĂŽle (18) comprend des moyens de contrĂŽle dĂ©clenchant le redĂ©marrage du moteur Ă  combustion (1 ), lorsque :- means for determining the current speed and the current acceleration of the vehicle, characterized in that, this vehicle being driven in a non-thermal mode in which the combustion engine (1) is stopped, this control device (18) comprises control means triggering the restart of the combustion engine (1), when:
- le véhicule roule à une vitesse inférieure à une premiÚre vitesse seuil, et - the vehicle is traveling at a speed lower than a first threshold speed, and
- le véhicule roule avec une accélération négative inférieure à une accélération seuil, et- the vehicle is rolling with a negative acceleration lower than a threshold acceleration, and
- le dispositif de commande de frein n’est pas actionnĂ© par le conducteur. - the brake control device is not actuated by the driver.
2. Dispositif de contrÎle (18) selon la revendication 1 , ce dispositif de contrÎle (18) comprenant un moyen de contrÎle du véhicule en un mode de marche rampante, caractérisé en ce que la premiÚre vitesse seuil est une vitesse maximale autorisée prédéterminée du véhicule pour le mode de marche rampante. 2. Control device (18) according to claim 1, this control device (18) comprising means for controlling the vehicle in a creeping mode, characterized in that the first threshold speed is a predetermined maximum authorized speed of the vehicle for creep mode.
3. Dispositif de contrĂŽle (18) selon l’une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce que la premiĂšre vitesse seuil est infĂ©rieure ou Ă©gale Ă  15 Km/h. 3. Control device (18) according to one of the preceding claims, characterized in that the first threshold speed is less than or equal to 15 km/h.
4. Dispositif de contrĂŽle (18) selon l’une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce que la premiĂšre vitesse seuil est comprise entre 5 et 8 Km/h, notamment Ă©gale Ă  7 Km/h. 4. Control device (18) according to one of the preceding claims, characterized in that the first threshold speed is between 5 and 8 km/h, in particular equal to 7 km/h.
5. Dispositif de contrĂŽle (18) selon l’une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce que l’accĂ©lĂ©ration seuil est infĂ©rieure Ă  0 m/s2. 5. Control device (18) according to one of the preceding claims, characterized in that the threshold acceleration is less than 0 m/s 2 .
6. Dispositif de contrĂŽle (18) selon l’une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce que l’accĂ©lĂ©ration seuil est comprise entre 0 m/s2 et - 0,5 m/s2, notamment Ă©gale Ă  - 0,2 m/s2. 6. Control device (18) according to one of the preceding claims, characterized in that the threshold acceleration is between 0 m/s 2 and - 0.5 m/s 2 , in particular equal to - 0.2 m /s 2 .
7. Dispositif de contrĂŽle (18) selon l’une des revendications prĂ©cĂ©dentes, le vĂ©hicule comprenant un dispositif de frein de parking, caractĂ©risĂ© en ce que consĂ©cutivement Ă  ce redĂ©marrage, les moyens de contrĂŽle autorisent l’arrĂȘt du moteur Ă  combustion (1 ) si:7. Control device (18) according to one of the preceding claims, the vehicle comprising a parking brake device, characterized in that following this restart, the control means authorize the stopping of the combustion engine (1) if:
- ce dispositif de frein de parking est actionné pour freiner le véhicule, ou, - le véhicule roule à une vitesse supérieure à une seconde vitesse seuil, et avec une accélération positive supérieure ou égale à 0 m/s2. - this parking brake device is actuated to brake the vehicle, or, - the vehicle is traveling at a speed greater than a second threshold speed, and with a positive acceleration greater than or equal to 0 m/s 2 .
8. Dispositif de contrÎle (18) selon la revendication 7, caractérisé en ce que la seconde vitesse seuil est strictement supérieure à la premiÚre vitesse seuil. 8. Control device (18) according to claim 7, characterized in that the second threshold speed is strictly greater than the first threshold speed.
9. VĂ©hicule comprenant : 9. Vehicle including:
- un train de roues (8), - a set of wheels (8),
- un moteur à combustion (1) et une machine motrice non-thermique (9) configurés pour fournir respectivement des couples pour au moins le train de roues (8), - a combustion engine (1) and a non-thermal driving machine (9) configured to respectively supply torques for at least the wheel set (8),
- une machine électrique (3) configurée pour un redémarrage du moteur à combustion (1), - un dispositif de commande de frein couplée à un circuit de freinage du véhicule, - an electric machine (3) configured for restarting the combustion engine (1), - a brake control device coupled to a braking circuit of the vehicle,
- un moyen de dĂ©termination de la vitesse en cours et de l’accĂ©lĂ©ration en cours du vĂ©hicule hybride, caractĂ©risĂ© en ce qu’il comprend un dispositif de contrĂŽle (18) selon l’une des revendications prĂ©cĂ©dentes. - means for determining the current speed and the current acceleration of the hybrid vehicle, characterized in that it comprises a control device (18) according to one of the preceding claims.
10. Véhicule selon la revendication 9, caractérisé en ce que la machine motrice non- thermique (9) est un moteur électrique dont le couple maximal possible ramené aux roues du train de roues (8) pour une vitesse du véhicule entre 0 et 10 km/h est inférieure à 1250 N.m. 10. Vehicle according to claim 9, characterized in that the non-thermal driving machine (9) is an electric motor whose maximum possible torque reduced to the wheels of the wheel set (8) for a vehicle speed between 0 and 10 km /h is less than 1250 N.m.
EP21749680.1A 2020-09-29 2021-07-13 Device for controlling the restarting of a combustion engine of a hybrid vehicle Pending EP4222009A1 (en)

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FR2009919A FR3114559A1 (en) 2020-09-29 2020-09-29 DEVICE FOR CONTROLLING THE RESTART OF A COMBUSTION ENGINE OF A HYBRID VEHICLE
PCT/FR2021/051299 WO2022069807A1 (en) 2020-09-29 2021-07-13 Device for controlling the restarting of a combustion engine of a hybrid vehicle

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FR3070347B1 (en) 2017-08-22 2019-08-16 Psa Automobiles Sa MONITORING TIMES OF TRIGGERING BY A THERMAL MOTOR AND NON-THERMAL MOTOR MACHINE OF A HYBRID VEHICLE

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