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EP3668738A1 - Method for switching between transmission modes in a hybrid motor vehicle - Google Patents

Method for switching between transmission modes in a hybrid motor vehicle

Info

Publication number
EP3668738A1
EP3668738A1 EP18749850.6A EP18749850A EP3668738A1 EP 3668738 A1 EP3668738 A1 EP 3668738A1 EP 18749850 A EP18749850 A EP 18749850A EP 3668738 A1 EP3668738 A1 EP 3668738A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
mode
heat engine
acceleration
switching
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.)
Withdrawn
Application number
EP18749850.6A
Other languages
German (de)
French (fr)
Inventor
Yohan MILHAU
Gaetan Rocq
Emmanuel COZ
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.)
PSA Automobiles SA
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 EP3668738A1 publication Critical patent/EP3668738A1/en
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B60K6/22—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 apparatus, components or means specially adapted for HEVs
    • B60K6/38—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 apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
    • B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
    • 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
    • B60K6/44—Series-parallel type
    • B60K6/448—Electrical distribution 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
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B60W20/20—Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
    • 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
    • B60W2530/00—Input parameters relating to vehicle conditions or values, not covered by groups B60W2510/00 or B60W2520/00
    • B60W2530/16—Driving resistance
    • 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

  • the invention relates to a method of switching between modes of transmission on a hybrid motor vehicle, and a hybrid motor vehicle implementing the method.
  • the combustion engine is coupled to a driving gear train via a clutch with friction surfaces (disc or drum surfaces, in particular) sliding, the sliding being necessary for the low speeds of movement of the vehicle, for which the minimum engine speed is too high, even with a minimum gear ratio.
  • the coupling can also be performed hydraulically by a torque converter comprising a pump, a turbine and a fluid, and which also uses a sliding phenomenon at low vehicle speeds.
  • the electric drive motor it has, in the vehicles concerned, only a limited power, resulting in a limited maximum torque, insufficient to allow the transmission of the vehicle with a significant acceleration.
  • the engine uses a fossil fuel (gasoline or diesel fuel typically), and that it is desired to minimize its use for ecological purposes.
  • the vehicle has an electrical energy storage (alternative energy), such as a 300 V traction battery, and an electricity generator that can be coupled to the engine (it can be a front electric machine, the heat engine being also in front in this configuration).
  • the transmission electric motor can be a rear electric machine, able to put the vehicle in motion autonomously. It can also have a function of electricity generator to recharge the battery in deceleration phase of the vehicle for example.
  • Such a vehicle can run in a first mode, said hybrid series, with the use of the heat engine to produce alternative energy via the front electric motor which is then coupled to the engine.
  • These two engines are against decoupled wheels, and the transmission of the machine is provided with the help of the rear electric machine.
  • the vehicle can ride in a second mode, said full hybrid. This involves the use of the heat engine for transmission. Electrical energy is used to optimize the use of fossil energy.
  • Document WO200322617 discloses a method for regulating the speed of a motor vehicle with an automatic gearbox. But it does not teach a method to reduce energy losses in case of sliding of the coupling member.
  • a switching method on a motor vehicle comprising an electric motor, a heat engine, an electrical energy generator and a sliding coupling member for coupling the heat engine to a train of driving wheels of the vehicle, a first transmission mode in which the electric motor drives the vehicle, and electrical energy is generated by the drive of the electric power generator by the heat engine, to a second transmission mode wherein the engine drives the vehicle, the engine having a minimum idle speed.
  • the method is remarkable because it comprises a step of determining a maximum available acceleration value without switching from the first mode to the second mode, and then based on a current acceleration setpoint for the conduct of the vehicle and said maximum acceleration available, a switching in the second mode to provide a power of the engine so as to respond to the current set or maintenance in the first mode.
  • the maximum available acceleration value is determined by taking into account resistant rolling forces, aerodynamic resistant forces, and resistant forces caused by a slope of the ground. on which the vehicle rolls.
  • the current acceleration instruction for driving the vehicle is obtained by a driving assistance system;
  • the method is implemented only below a threshold of horizontal speed of the vehicle, or below a level of electrical energy storage in the vehicle.
  • the invention also consists in a motor vehicle comprising an electric motor, a heat engine, an electrical energy generator and a sliding coupling member for coupling the heat engine to a vehicle wheel train, as well as to means for a first mode of transmission in which the electric motor drives the vehicle, and electrical energy is generated by the drive of the electric power generator by the heat engine, and means for a second transmission mode in which the engine drives the vehicle, the engine having a minimum idle speed.
  • the vehicle is remarkable because it comprises means for determining a maximum available acceleration value without switching from the first mode to the second mode taking into account a maximum acceleration obtainable by the first mode, means for, on the basis of a current setpoint of acceleration for driving the vehicle and said maximum available acceleration, switch in the second mode to provide a power of the engine to respond to the current or maintain the first mode.
  • the sliding coupling member may be a clutch with friction surfaces or a torque converter.
  • FIG. 1 is a view of a vehicle to which the invention applies;
  • FIG. 2 is a view of an embodiment of the invention.
  • the hybrid vehicle 1 comprises two traction chains connected respectively to the two trains 100, 1 10 of the vehicle 1.
  • the first traction chain for example connected to the front axle 100 with respect to the direction of travel in the forward direction of the vehicle 1, comprises a heat engine 230 whose output shaft is connected to the input shaft. a first electric machine 210 via a clutch 220, this clutch 220 for coupling or uncoupling the heat engine 230 of the gearbox 200.
  • the clutch 220 is a mechanical clutch, or a torque converter using a hydraulic coupling.
  • the first electrical machine 210 is further connected via its output shaft to the input shaft of a gearbox 200 of the vehicle, the output shaft of this gearbox 200 being connected to the front axle 100 via a first differential device 101 (with the possibility of decoupling the electric machine 210 from the train 100).
  • the second traction chain for example connected to the rear axle 1 10 of the vehicle 1, comprises a second electrical machine 320 whose output shaft is connected to a temporary coupling member for coupling or decoupling the second electrical machine 320 of the rear axle 1 10, this coupling member being itself connected to the rear axle 1 10 by means of a second differential device 1 1 1.
  • a gear type transmission system 310 Between the output shaft of the second electrical machine 320 and the temporary coupling member 300 may be interposed a gear type transmission system 310, to increase the torque of the second electrical machine 320 transmitted to the rear axle 1 10.
  • the hybrid vehicle 1 also comprises a battery 400 electrically connected to the terminals of the two electrical machines 210, 320 (inverters can be integrated between the battery 400 and the machines 210, 320), and a computer 500 for driving the various elements of the traction chains, in particular the electric machines 210, 320, the clutch 220, the temporary coupling member 300 and the gearbox 200.
  • FIG. 2 A switching method according to one embodiment of the invention is shown in FIG. 2.
  • Step 10 it comprises a step 10 of taking into account the resistant forces.
  • the rolling forces related to the contact of the tires on the ground the aerodynamic forces related to the resistance opposed by the air to the vehicle, and the forces related to the slope to which the vehicle faces.
  • This step is followed by a step of calculating the maximum acceleration that can be obtained for the vehicle, in series hybrid mode, taking into account the resistant forces observed previously, and taking into account a maximum torque value of 15. for the powertrain in hybrid series, brought back to the wheel. It is recalled that in series hybrid mode, it is the electric machine 320 which drives the vehicle, while the machine 200 produces, under the effect of the heat engine 230, electricity which is stored in the battery 400. [ 0030] An example of calculation with the fundamental principle of dynamics is as follows:
  • Aveh max GJffm "+ - ⁇ ⁇
  • the maximum comfort acceleration is defined, by mapping or by another method, according to the speed of the vehicle and the difference between the speed reference and the speed of the vehicle .
  • the maximum setpoint acceleration value that is to say the maximum acceleration value available for the regulation and speed limiting functions, which fix the maximum acceleration values, is calculated. acceleration setpoints.
  • This maximum setpoint acceleration value is the maximum between the maximum acceleration available in the current state of the powertrain group, determined during step 20 and the comfort acceleration, determined in step 25.
  • the method is continued with a step 40 for calculating the setpoint acceleration, on the basis of the acceleration required by the driving assistance functions (in particular the regulation and speed limitation functions).
  • the setpoint acceleration is then equal to the acceleration requested by the driving assistance functions (typically the regulation and speed limitation functions), referenced 35, limited by the maximum setpoint acceleration determined at step 30.
  • a step 50 involves converting torque to the wheel of the value of the setpoint acceleration.
  • a step 60 it is decided to maintain the serial hybrid mode or switch the transmission in full hybrid mode.
  • the transmission of the powertrain rocking in full hybrid mode As long as the acceleration of comfort can be achieved, the hybrid mode series is activated. As soon as the acceleration of comfort can not be achieved, the transmission is switched out of serial hybrid mode, to full hybrid mode.
  • the strategy is implemented only below a speed threshold. - The strategy is implemented only if the battery contains only a small amount of energy, as appreciated by comparing it to a threshold, for example;
  • the strategy is applicable only in the life situation in which the clutch is necessarily slippery.
  • the decision to change mode is based on a comparison of torque, acceleration, or power.
  • These steps can be carried out taking into account a system making it possible to know the distance to the predecessor vehicle, as well as the speed of said vehicle. These steps can be carried out taking into account a rain detection system, such as a sensor triggering the automatic wipers, or information from a GPS or GSM system giving the weather as well as the state of the road .
  • a rain detection system such as a sensor triggering the automatic wipers
  • information from a GPS or GSM system giving the weather as well as the state of the road .
  • the method avoids the energy losses induced by the sliding of the coupling element, avoids the rise in temperature of the clutch which leads to a loss of torque potential to the wheel, increases the durability of the clutch, provides power to the fossil-fueled power source, offers the possibility of increasing the recharging of the alternative energy store during low-speed driving because there is no energy loss by Coupling slip improves overall yields and improves the sustainability of the supply of electrical energy in low-speed life situations.
  • the invention promotes the use of the hybrid world series to avoid sliding the coupling member. It avoids energy losses and preserves the clutch. When the will of the driver facing the acceleration of comfort is too important, the power of the fossil-fueled power source is made available and a higher power is transmitted. Thus, the method reduces energy losses induced by sliding coupling without degrading the performance of the vehicle.

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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)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention relates to a switching method, in a motor vehicle comprising an electric motor (320), a heat engine (230), an electric power generator (210) and a sliding coupling member (220) for coupling the heat engine to a set of drive wheels (100) of the vehicle, for switching from a first transmission mode in which the electric motor (320) drives the vehicle, and the electric power is generated by the electric power generator (210) that is driven by the heat engine (230), to a second transmission mode in which the heat engine (230) drives the vehicle, the heat engine having a minimum idle speed. The method comprises a step of determining (30) a maximum acceleration value available without switching, and then based on an instantaneous acceleration instruction (35) for driving the vehicle and said maximum acceleration available, switching into the second mode or staying in the first mode.

Description

"PROCEDE DE COMMUTATION ENTRE MODES DE TRANSMISSION SUR UN VEHICULE AUTOMOBILE HYBRIDE"  "METHOD OF SWITCHING BETWEEN TRANSMISSION MODES ON A HYBRID AUTOMOBILE VEHICLE"
[0001 ] L'invention porte sur un procédé de commutation entre modes de transmission sur un véhicule automobile hybride, et sur un véhicule automobile hybride mettant en œuvre le procédé. The invention relates to a method of switching between modes of transmission on a hybrid motor vehicle, and a hybrid motor vehicle implementing the method.
[0002] On s'intéresse à des véhicules automobiles comportant un moteur thermique et un moteur électrique, les deux moteurs pouvant servir pour la transmission du véhicule. Le moteur thermique est couplé à un train de roues motrices par l'intermédiaire d'un embrayage à surfaces de friction (à disque ou à tambour, notamment) à glissement, le glissement étant nécessaire pour les petites vitesses de déplacement du véhicule, pour lesquelles le régime minimal du moteur thermique est trop élevé, même avec un rapport de vitesses minimal. Le couplage peut aussi être effectué de manière hydraulique par un convertisseur de couple comprenant une pompe, une turbine et un fluide, et qui utilise également un phénomène de glissement aux petites vitesses de déplacement du véhicule. Quant au moteur électrique de transmission, il ne dispose, dans les véhicules concernés, que d'une puissance limitée, se traduisant par un couple maximal limité, insuffisant pour permettre la transmission du véhicule avec une accélération importante. We are interested in motor vehicles having a heat engine and an electric motor, the two engines can be used for the transmission of the vehicle. The combustion engine is coupled to a driving gear train via a clutch with friction surfaces (disc or drum surfaces, in particular) sliding, the sliding being necessary for the low speeds of movement of the vehicle, for which the minimum engine speed is too high, even with a minimum gear ratio. The coupling can also be performed hydraulically by a torque converter comprising a pump, a turbine and a fluid, and which also uses a sliding phenomenon at low vehicle speeds. As for the electric drive motor, it has, in the vehicles concerned, only a limited power, resulting in a limited maximum torque, insufficient to allow the transmission of the vehicle with a significant acceleration.
[0003] On précise que le moteur thermique utilise une énergie fossile (carburant essence ou diesel typiquement), et que l'on souhaite minimiser son utilisation à des fins écologiques. It is specified that the engine uses a fossil fuel (gasoline or diesel fuel typically), and that it is desired to minimize its use for ecological purposes.
[0004] Le véhicule dispose d'un stockeur d'énergie électrique (énergie alternative), comme une batterie de traction 300 V, et d'un générateur d'électricité pouvant être attelé au moteur thermique (il peut s'agir d'une machine électrique avant, le moteur thermique étant aussi à l'avant dans cette configuration). [0005] Le moteur électrique de transmission peut être une machine électrique arrière, capable de mettre le véhicule en mouvement de manière autonome. Il peut aussi avoir une fonction de générateur d'électricité pour recharger la batterie en phase de décélération du véhicule par exemple. The vehicle has an electrical energy storage (alternative energy), such as a 300 V traction battery, and an electricity generator that can be coupled to the engine (it can be a front electric machine, the heat engine being also in front in this configuration). The transmission electric motor can be a rear electric machine, able to put the vehicle in motion autonomously. It can also have a function of electricity generator to recharge the battery in deceleration phase of the vehicle for example.
[0006] Un tel véhicule peut rouler dans un premier mode, dit hybride série, avec utilisation du moteur thermique afin de produire de l'énergie alternative via le moteur électrique avant qui est alors attelé au moteur thermique. Ces deux moteurs sont par contre découplés des roues, et la transmission de l'engin est assurée à l'aide de la machine électrique arrière. Such a vehicle can run in a first mode, said hybrid series, with the use of the heat engine to produce alternative energy via the front electric motor which is then coupled to the engine. These two engines are against decoupled wheels, and the transmission of the machine is provided with the help of the rear electric machine.
[0007] Le véhicule peut rouler dans un deuxième mode, dit full hybride. Cela implique une utilisation du moteur thermique pour la transmission. L'énergie électrique est utilisée pour optimiser l'utilisation de l'énergie fossile. The vehicle can ride in a second mode, said full hybrid. This involves the use of the heat engine for transmission. Electrical energy is used to optimize the use of fossil energy.
[0008] On précise que lors de la mise en œuvre du deuxième mode, il y a, pour les petites vitesses, un glissement de l'embrayage à glissement, et une perte énergétique associée, ce qui est regrettable. Cela est inévitable si le moteur thermique est couplé aux roues à petite vitesse de déplacement, car le moteur thermique a un régime minimal qualifié de régime de ralenti. It is specified that during the implementation of the second mode, there is, for the low speeds, a slip of the sliding clutch, and an associated energy loss, which is regrettable. This is inevitable if the heat engine is coupled to the wheels at low speed of travel, because the engine has a minimum rated speed of idling speed.
[0009] On connaît du document WO200322617 un procédé de régulation de la vitesse d'un véhicule automobile à boîte de vitesses automatique. Mais il n'enseigne pas de méthode pour diminuer les pertes énergétiques en cas de glissement de l'organe de couplage. [0010] Pour résoudre cette difficulté, il est proposé un procédé de commutation, sur un véhicule automobile comprenant un moteur électrique, un moteur thermique, un générateur d'énergie électrique et un organe de couplage glissant pour coupler le moteur thermique à un train de roues motrices du véhicule, d'un premier mode de transmission dans lequel le moteur électrique entraine le véhicule, et de l'énergie électrique est générée par l'entraînement du générateur d'énergie électrique par le moteur thermique, vers un deuxième mode de transmission dans lequel le moteur thermique entraine le véhicule, le moteur thermique ayant un régime minimal de ralenti. Document WO200322617 discloses a method for regulating the speed of a motor vehicle with an automatic gearbox. But it does not teach a method to reduce energy losses in case of sliding of the coupling member. To solve this problem, it is proposed a switching method, on a motor vehicle comprising an electric motor, a heat engine, an electrical energy generator and a sliding coupling member for coupling the heat engine to a train of driving wheels of the vehicle, a first transmission mode in which the electric motor drives the vehicle, and electrical energy is generated by the drive of the electric power generator by the heat engine, to a second transmission mode wherein the engine drives the vehicle, the engine having a minimum idle speed.
[001 1 ] Le procédé est remarquable car il comprend une étape de détermination d'une valeur d'accélération maximale disponible sans commutation du premier mode vers le deuxième mode, puis sur la base d'une consigne courante d'accélération pour la conduite du véhicule et de ladite accélération maximale disponible, une commutation dans le deuxième mode pour mettre à disposition une puissance du moteur thermique en sorte de répondre à la consigne courante ou le maintien dans le premier mode. [001 1] The method is remarkable because it comprises a step of determining a maximum available acceleration value without switching from the first mode to the second mode, and then based on a current acceleration setpoint for the conduct of the vehicle and said maximum acceleration available, a switching in the second mode to provide a power of the engine so as to respond to the current set or maintenance in the first mode.
[0012] Selon des caractéristiques particulières et avantageuses : [0013] - la valeur d'accélération maximale disponible est déterminée en tenant compte d'efforts résistants de roulement, d'efforts résistants aérodynamiques, et d'efforts résistants causés par une pente du terrain sur lequel le véhicule roule. [0014] - la consigne courante d'accélération pour la conduite du véhicule est obtenue par un système d'assistance à la conduite ; According to particular and advantageous characteristics: [0013] the maximum available acceleration value is determined by taking into account resistant rolling forces, aerodynamic resistant forces, and resistant forces caused by a slope of the ground. on which the vehicle rolls. [0014] the current acceleration instruction for driving the vehicle is obtained by a driving assistance system;
[0015] - le procédé n'est mis en œuvre qu'en dessous d'un seuil de vitesse horizontale du véhicule, ou en dessous d'un niveau de stockage d'énergie électrique dans le véhicule. [0016] L'invention consiste aussi en un véhicule automobile comprenant un moteur électrique, un moteur thermique, un générateur d'énergie électrique et un organe de couplage glissant pour coupler le moteur thermique à un train de roues motrices du véhicule, ainsi que de moyens pour un premier mode de transmission dans lequel le moteur électrique entraine le véhicule, et de l'énergie électrique est générée par l'entraînement du générateur d'énergie électrique par le moteur thermique, et de moyens pour un deuxième mode de transmission dans lequel le moteur thermique entraine le véhicule, le moteur thermique ayant un régime minimal de ralenti. - The method is implemented only below a threshold of horizontal speed of the vehicle, or below a level of electrical energy storage in the vehicle. The invention also consists in a motor vehicle comprising an electric motor, a heat engine, an electrical energy generator and a sliding coupling member for coupling the heat engine to a vehicle wheel train, as well as to means for a first mode of transmission in which the electric motor drives the vehicle, and electrical energy is generated by the drive of the electric power generator by the heat engine, and means for a second transmission mode in which the engine drives the vehicle, the engine having a minimum idle speed.
[0017] Le véhicule est remarquable car il comprend des moyens de détermination d'une valeur d'accélération maximale disponible sans commutation du premier mode vers le deuxième mode en tenant compte d'une accélération maximale pouvant être obtenue par le premier mode, des moyens pour, sur la base d'une consigne courante d'accélération pour la conduite du véhicule et de ladite accélération maximale disponible, effectuer une commutation dans le deuxième mode pour mettre à disposition une puissance du moteur thermique en sorte de répondre à la consigne courante ou maintenir le premier mode. [0018] L'organe de couplage glissant peut être un embrayage à surfaces de friction ou un convertisseur de couple. The vehicle is remarkable because it comprises means for determining a maximum available acceleration value without switching from the first mode to the second mode taking into account a maximum acceleration obtainable by the first mode, means for, on the basis of a current setpoint of acceleration for driving the vehicle and said maximum available acceleration, switch in the second mode to provide a power of the engine to respond to the current or maintain the first mode. The sliding coupling member may be a clutch with friction surfaces or a torque converter.
[0019] L'invention sera mieux comprise, et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement dans la description explicative qui va suivre faite en référence aux dessins annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels : The invention will be better understood, and other objects, features, details and advantages thereof will appear more clearly in the explanatory description which follows with reference to the accompanying drawings given solely by way of example illustrating a embodiment of the invention and in which:
- La figure 1 est une vue d'un véhicule auquel l'invention s'applique ; FIG. 1 is a view of a vehicle to which the invention applies;
- la figure 2 est une vue d'un mode de réalisation de l'invention. FIG. 2 is a view of an embodiment of the invention.
[0020] En référence à la figure 1 , le procédé de fonctionnement d'un véhicule automobile hybride 10 selon l'invention va maintenant être décrit. [0021 ] Le véhicule hybride 1 comprend deux chaînes de traction reliées respectivement aux deux trains 100, 1 10 du véhicule 1. With reference to FIG. 1, the operating method of a hybrid motor vehicle 10 according to the invention will now be described. The hybrid vehicle 1 comprises two traction chains connected respectively to the two trains 100, 1 10 of the vehicle 1.
[0022] La première chaîne de traction, par exemple reliée au train avant 100 par rapport au sens de déplacement en marche avant du véhicule 1 , comprend un moteur thermique 230 dont l'arbre de sortie est relié à l'arbre d'entrée d'une première machine électrique 210 par l'intermédiaire d'un embrayage 220, cet embrayage 220 permettant de coupler ou découpler le moteur thermique 230 de la boite de vitesse 200. L'embrayage 220 est un embrayage mécanique, ou un convertisseur de couple utilisant un couplage hydraulique. The first traction chain, for example connected to the front axle 100 with respect to the direction of travel in the forward direction of the vehicle 1, comprises a heat engine 230 whose output shaft is connected to the input shaft. a first electric machine 210 via a clutch 220, this clutch 220 for coupling or uncoupling the heat engine 230 of the gearbox 200. The clutch 220 is a mechanical clutch, or a torque converter using a hydraulic coupling.
[0023] La première machine électrique 210 est en outre reliée par l'intermédiaire de son arbre de sortie à l'arbre d'entrée d'une boite de vitesses 200 du véhicule, l'arbre de sortie de cette boite de vitesse 200 étant relié au train avant 100 par l'intermédiaire d'un premier dispositif différentiel 101 (avec possibilité de découpler la machine électrique 210 du train 100). The first electrical machine 210 is further connected via its output shaft to the input shaft of a gearbox 200 of the vehicle, the output shaft of this gearbox 200 being connected to the front axle 100 via a first differential device 101 (with the possibility of decoupling the electric machine 210 from the train 100).
[0024] La deuxième chaîne de traction, par exemple reliée au train arrière 1 10 du véhicule 1 , comprend une deuxième machine électrique 320 dont l'arbre de sortie est relié à un organe de couplage temporaire destiné à coupler ou découpler la deuxième machine électrique 320 du train arrière 1 10, cet organe de couplage étant lui-même relié au train arrière 1 10 par l'intermédiaire d'un deuxième dispositif différentiel 1 1 1 . The second traction chain, for example connected to the rear axle 1 10 of the vehicle 1, comprises a second electrical machine 320 whose output shaft is connected to a temporary coupling member for coupling or decoupling the second electrical machine 320 of the rear axle 1 10, this coupling member being itself connected to the rear axle 1 10 by means of a second differential device 1 1 1.
[0025] Entre l'arbre de sortie de la deuxième machine électrique 320 et l'organe de couplage temporaire 300 peut être interposé un système de transmission du type réducteur 310, permettant de démultiplier le couple de la deuxième machine électrique 320 transmis au train arrière 1 10. Between the output shaft of the second electrical machine 320 and the temporary coupling member 300 may be interposed a gear type transmission system 310, to increase the torque of the second electrical machine 320 transmitted to the rear axle 1 10.
[0026] Le véhicule hybride 1 comprend également une batterie 400 électriquement reliée aux bornes des deux machines électriques 210, 320 (des onduleurs peuvent être intégrés entre la batterie 400 et les machines 210, 320), ainsi qu'un calculateur 500 destiné à piloter les différents éléments des chaînes de traction, notamment les machines électriques 210, 320, l'embrayage 220, l'organe de couplage temporaire 300 et la boite de vitesse 200. The hybrid vehicle 1 also comprises a battery 400 electrically connected to the terminals of the two electrical machines 210, 320 (inverters can be integrated between the battery 400 and the machines 210, 320), and a computer 500 for driving the various elements of the traction chains, in particular the electric machines 210, 320, the clutch 220, the temporary coupling member 300 and the gearbox 200.
[0027] Un procédé de commutation selon un mode de réalisation de l'invention est représenté en figure 2. A switching method according to one embodiment of the invention is shown in FIG. 2.
[0028] Tout d'abord, il comprend une étape 10 de prise en compte des efforts résistants. Il y a dans ces efforts, les efforts de roulement liés au contact des pneumatiques sur le sol, les efforts aérodynamiques liés à la résistance opposée par l'air au véhicule, et les efforts liés à la pente à laquelle le véhicule fait face. First, it comprises a step 10 of taking into account the resistant forces. There is in these efforts, the rolling forces related to the contact of the tires on the ground, the aerodynamic forces related to the resistance opposed by the air to the vehicle, and the forces related to the slope to which the vehicle faces.
[0029] Cette étape est suivie d'une étape de calcul de l'accélération maximale pouvant être obtenue pour le véhicule, en mode hybride série, compte tenu des efforts résistants observés précédemment, et en tenant compte d'une valeur 15 de couple maximum pour le groupe moto-propulseur en mode hybride série, ramené à la roue. On rappelle qu'en mode hybride série, c'est la machine électrique 320 qui entraine le véhicule, alors que la machine 200 produit, sous l'effet du moteur thermique 230, de l'électricité qui est stockée dans la batterie 400. [0030] Un exemple de calcul avec le principe fondamental de la dynamique est le suivant : This step is followed by a step of calculating the maximum acceleration that can be obtained for the vehicle, in series hybrid mode, taking into account the resistant forces observed previously, and taking into account a maximum torque value of 15. for the powertrain in hybrid series, brought back to the wheel. It is recalled that in series hybrid mode, it is the electric machine 320 which drives the vehicle, while the machine 200 produces, under the effect of the heat engine 230, electricity which is stored in the battery 400. [ 0030] An example of calculation with the fundamental principle of dynamics is as follows:
M.Aveh = forces M.Aveh = forces
[0031 ] ^ avec M la masse du véhicule, Aveh l'accélération véhicule et les forces considérées l'ensemble des forces appliqués au système véhicule. Ainsi, en écrivant séparément les différents types de force évoqués : [0032] M Aveh = F + F + F + F  M with the mass of the vehicle, Aveh acceleration vehicle and the forces considered all the forces applied to the vehicle system. Thus, by writing separately the different types of evoked force: [0032] M Aveh = F + F + F + F
[0033] OU aVeC F eS = F + F + F M Avph—F QMP + F [0033] OR wHEN F eS = F + F + FM Avph-F QMP + F
[0034] avec Cgm le couple du groupe moto-propulseur et R le rayon des roues With C gm the torque of the powertrain and R the radius of the wheels
M.Aveh = ^^ + F Aveh = ^^ + ^- [0035] et R , M.R M M.Aveh = ^^ + F Aveh = ^^ + ^ - [0035] and R, M.R M
[0036] D'où une valeur maximale d'accélération dans le mode hybride série From where a maximum value of acceleration in the series hybrid mode
C F  C F
Aveh max = GJffm" + -≡■ Aveh max = GJffm "+ -≡ ■
M.R M  M.R M
[0037] Au cours d'une étape 25, l'accélération maximale de confort est définie, par cartographie ou par une autre méthode, en fonction de la vitesse du véhicule et de l'écart entre la consigne de vitesse et la vitesse du véhicule. During a step 25, the maximum comfort acceleration is defined, by mapping or by another method, according to the speed of the vehicle and the difference between the speed reference and the speed of the vehicle .
[0038] Elle correspond à l'accélération limite sous laquelle la prestation de suivi de la consigne de vitesse n'est plus jugée acceptable. [0039] Au cours d'une étape 30, on calcule la valeur d'accélération de consigne maximale, c'est-à-dire la valeur d'accélération maximale disponible pour les fonctions de régulation et de limitation de vitesse, qui fixent des valeurs de consigne d'accélération. It corresponds to the limit acceleration under which the service of monitoring the speed setpoint is no longer deemed acceptable. During a step 30, the maximum setpoint acceleration value, that is to say the maximum acceleration value available for the regulation and speed limiting functions, which fix the maximum acceleration values, is calculated. acceleration setpoints.
[0040] Cette valeur d'accélération de consigne maximale est le maximum entre l'accélération maximale disponible dans l'état courant du groupe moto-propulseur, déterminée lors de l'étape 20 et l'accélération de confort, déterminée en étape 25. This maximum setpoint acceleration value is the maximum between the maximum acceleration available in the current state of the powertrain group, determined during step 20 and the comfort acceleration, determined in step 25.
[0041 ] Le procédé est poursuivi avec une étape 40 de calcul de l'accélération de consigne, sur la base de l'accélération demandée par les fonctions d'assistance à la conduite (notamment les fonctions de régulation et limitation de vitesse). [0042] L'accélération de consigne est alors égale à l'accélération demandée par les fonctions d'assistance à la conduite (typiquement les fonctions de régulation et limitation de vitesse), référencée 35, limitée par l'accélération de consigne maximale déterminée à l'étape 30. The method is continued with a step 40 for calculating the setpoint acceleration, on the basis of the acceleration required by the driving assistance functions (in particular the regulation and speed limitation functions). The setpoint acceleration is then equal to the acceleration requested by the driving assistance functions (typically the regulation and speed limitation functions), referenced 35, limited by the maximum setpoint acceleration determined at step 30.
[0043] Une étape 50 implique une conversion en couple à la roue de la valeur de l'accélération de consigne. A step 50 involves converting torque to the wheel of the value of the setpoint acceleration.
[0044] Au cours d'une étape 60, on décide de maintenir le mode hybride série ou de commuter la transmission en mode full hybride. During a step 60, it is decided to maintain the serial hybrid mode or switch the transmission in full hybrid mode.
[0045] Si la consigne de couple demandée est supérieure à la capacité du mode hybride série alors la transmission du groupe moto-propulseur bascule en mode full hybride. [0046] Tant que l'accélération de confort peut être réalisée, le mode hybride série est activé. Dès que l'accélération de confort ne peut pas être réalisée, la transmission est basculée hors du mode hybride série, vers le mode full hybride. If the requested torque setpoint is greater than the capacity of the hybrid mode series then the transmission of the powertrain rocking in full hybrid mode. As long as the acceleration of comfort can be achieved, the hybrid mode series is activated. As soon as the acceleration of comfort can not be achieved, the transmission is switched out of serial hybrid mode, to full hybrid mode.
[0047] Selon divers modes de réalisation, According to various embodiments,
[0048] - la stratégie est mise en œuvre uniquement en dessous d'un seuil de vitesse. [0049] - la stratégie est mise en œuvre uniquement si la batterie ne contient qu'une quantité d'énergie faible, telle qu'appréciée en la comparant à un seuil, par exemple ; - The strategy is implemented only below a speed threshold. - The strategy is implemented only if the battery contains only a small amount of energy, as appreciated by comparing it to a threshold, for example;
[0050] - la stratégie est applicable uniquement dans la situation de vie dans laquelle l'embrayage est nécessairement glissant. [0051 ] - la décision de changement de mode se fait sur la base d'une comparaison de couple, d'accélération, ou de puissance. - The strategy is applicable only in the life situation in which the clutch is necessarily slippery. - The decision to change mode is based on a comparison of torque, acceleration, or power.
[0052] Il peut y avoir des confirmations de type (ces critères non exhaustifs peuvent être exclusifs ou cumulatifs) : [0053] - confirmation de la sortie du mode hybride série lorsque le seuil a dépassé un temps, comme par exemple 0,10 s ou 2s ; There may be type confirmations (these non-exhaustive criteria may be exclusive or cumulative): [0053] confirmation of the output of the hybrid series mode when the threshold has exceeded a time, such as for example 0.10 s or 2s;
[0054] - confirmation de la sortie du mode hybride série lorsque l'intégrale entre le couple de consigne tenant compte de l'accélération et le couple maximal réalisable du mode hybride série a dépassé un seuil, comme par exemple 100Nm.s ou 5000N.m.s. [0055] Toutes les étapes mentionnées peuvent être effectuées en tenant compte de la vitesse du véhicule, du régime des sources motrices, des paramètres d'état du système (telle que la température des embrayages, des machines, le niveau d'énergie des stockeurs d'énergie), des paramètres extérieurs (la pente, la température extérieure, l'altitude). [0056] Ces étapes peuvent être effectuées en tenant compte d'un système permettant de lire les panneaux et indications de signalisation (tel que la couleur d'un feu tricolore, la limitation de vitesse, les panneaux, les lignes de circulation). Confirmation of the output of the hybrid series mode when the integral between the setpoint torque taking into account the acceleration and the maximum achievable torque of the hybrid series mode has exceeded a threshold, such as 100Nm.s or 5000N. ms All the mentioned steps can be performed taking into account the speed of the vehicle, the power source regime, system status parameters (such as the temperature of the clutches, the machines, the energy level of the storers of energy), external parameters (slope, outside temperature, altitude). These steps can be performed taking into account a system for reading signs and signaling indications (such as the color of a traffic light, the speed limit, signs, traffic lines).
[0057] Ces étapes peuvent être effectuées en tenant compte d'un système permettant de connaître Tinter distance avec le véhicule prédécesseur, ainsi que la vitesse dudit véhicule. Ces étapes peuvent être effectuées en tenant compte d'un système de détection de pluie, tel qu'un capteur déclenchant les essuie-glaces automatiques, ou des informations d'un système GPS ou GSM donnant la météo ainsi que l'état de la route. These steps can be carried out taking into account a system making it possible to know the distance to the predecessor vehicle, as well as the speed of said vehicle. These steps can be carried out taking into account a rain detection system, such as a sensor triggering the automatic wipers, or information from a GPS or GSM system giving the weather as well as the state of the road .
[0058] De manière générale, le procédé évite les pertes énergétiques induites par le glissement de l'élément de couplage, évite la montée en température de l'embrayage qui conduit à une perte de potentiel de couple à la roue, augmente la durabilité de l'embrayage, met à disposition de la puissance la source motrice à énergie fossile, offre la possibilité d'augmenter la recharge du stockeur d'énergie alternative lors du roulage à basse vitesse car il n'y a pas de perte d'énergie par le glissement du couplage, améliore au global les rendements, et offre une amélioration de la pérennité de la fourniture d'énergie électrique dans les situations de vie basse vitesse. [0059] Pour résumer, l'invention favorise l'utilisation du monde hybride série pour éviter de faire glisser l'organe de couplage. On évite des pertes énergétiques et on préserve l'embrayage. Lorsque la volonté du conducteur confrontée à l'accélération de confort est trop importante on met à disposition la puissance de la source motrice à énergie fossile et on transmet une puissance supérieure. Ainsi, le procédé réduit les pertes énergétiques induites par un couplage glissant sans dégrader la performance du véhicule. In general, the method avoids the energy losses induced by the sliding of the coupling element, avoids the rise in temperature of the clutch which leads to a loss of torque potential to the wheel, increases the durability of the clutch, provides power to the fossil-fueled power source, offers the possibility of increasing the recharging of the alternative energy store during low-speed driving because there is no energy loss by Coupling slip improves overall yields and improves the sustainability of the supply of electrical energy in low-speed life situations. To summarize, the invention promotes the use of the hybrid world series to avoid sliding the coupling member. It avoids energy losses and preserves the clutch. When the will of the driver facing the acceleration of comfort is too important, the power of the fossil-fueled power source is made available and a higher power is transmitted. Thus, the method reduces energy losses induced by sliding coupling without degrading the performance of the vehicle.

Claims

REVENDICATIONS
1 . Procédé de commutation, sur un véhicule automobile comprenant un moteur électrique (320), un moteur thermique (230), un générateur d'énergie électrique (210) et un organe de couplage glissant (220) pour coupler le moteur thermique à un train de roues motrices (100) du véhicule, d'un premier mode de transmission dans lequel le moteur électrique (320) entraine le véhicule, et de l'énergie électrique est générée par l'entraînement du générateur d'énergie électrique (210) par le moteur thermique (230), vers un deuxième mode de transmission dans lequel le moteur thermique (230) entraine le véhicule, le moteur thermique ayant un régime minimal de ralenti, caractérisé en ce qu'il comprend une étape de détermination (30) d'une valeur d'accélération maximale disponible sans commutation du premier mode vers le deuxième mode, puis sur la base d'une consigne courante d'accélération (35) pour la conduite du véhicule et de ladite accélération maximale disponible, une commutation dans le deuxième mode pour mettre à disposition une puissance du moteur thermique (230) en sorte de répondre à la consigne courante ou le maintien dans le premier mode. 1. A switching method on a motor vehicle comprising an electric motor (320), a heat engine (230), an electric power generator (210) and a sliding coupling member (220) for coupling the heat engine to a train of driving wheels (100) of the vehicle, a first transmission mode in which the electric motor (320) drives the vehicle, and electrical energy is generated by driving the electric power generator (210) by the thermal engine (230), to a second transmission mode in which the engine (230) drives the vehicle, the engine having a minimum idle speed, characterized in that it comprises a step of determining (30) a maximum acceleration value available without switching from the first mode to the second mode, then based on a current acceleration setpoint (35) for driving the vehicle and said maximum available acceleration, switching in the second mode to provide a power of the heat engine (230) so as to respond to the current set or maintenance in the first mode.
2. Procédé de commutation selon la revendication 1 , caractérisé en ce que la valeur d'accélération maximale disponible est déterminée en tenant compte d'efforts résistants (10) de roulement, d'efforts résistants aérodynamiques, et d'efforts résistants causés par une pente du terrain sur lequel le véhicule roule. 2. Switching method according to claim 1, characterized in that the maximum available acceleration value is determined taking into account the resistant forces (10) rolling, aerodynamic resistant forces, and resistant forces caused by a slope of the land on which the vehicle is traveling.
3. Procédé de commutation selon la revendication 1 ou la revendication 2, caractérisé en ce que la consigne courante d'accélération (35) pour la conduite du véhicule est obtenue par un système d'assistance à la conduite. 3. A switching method according to claim 1 or claim 2, characterized in that the current acceleration setpoint (35) for driving the vehicle is obtained by a driving assistance system.
4. Procédé de commutation selon l'une des revendications 1 à 3, caractérisé en ce que le procédé n'est mis en œuvre qu'en dessous d'un seuil de vitesse horizontale du véhicule, ou en dessous d'un niveau de stockage d'énergie électrique dans le véhicule. 4. Switching method according to one of claims 1 to 3, characterized in that the method is implemented only below a threshold of horizontal speed of the vehicle, or below a storage level of electrical energy in the vehicle.
5. Véhicule automobile comprenant un moteur électrique (320), un moteur thermique (230), un générateur d'énergie électrique (210) et un organe de couplage glissant (220) pour coupler le moteur thermique (230) à un train de roues motrices (100) du véhicule, ainsi que de moyens pour un premier mode de transmission dans lequel le moteur électrique (320) entraine le véhicule, et de l'énergie électrique est générée par l'entraînement du générateur d'énergie électrique par le moteur thermique (230), et de moyens pour un deuxième mode de transmission dans lequel le moteur thermique (230) entraine le véhicule, le moteur thermique ayant un régime minimal de ralenti, caractérisé en ce qu'il comprend des moyens de détermination d'une valeur d'accélération maximale disponible sans commutation du premier mode vers le deuxième mode en tenant compte d'une accélération maximale pouvant être obtenue par le premier mode, des moyens pour, sur la base d'une consigne courante d'accélération pour la conduite du véhicule et de ladite accélération maximale disponible, effectuer une commutation dans le deuxième mode pour mettre à disposition une puissance du moteur thermique (230) en sorte de répondre à la consigne courante ou maintenir le premier mode. A motor vehicle comprising an electric motor (320), a heat engine (230), an electric power generator (210) and a slip coupling member (220) for coupling the heat engine (230) to a wheel set motor (100) of the vehicle, as well as means for a first transmission mode in which the electric motor (320) drives the vehicle, and electrical energy is generated by the drive of the electric power generator by the engine thermal device (230), and means for a second transmission mode in which the heat engine (230) drives the vehicle, the heat engine having a minimum idle speed, characterized in that it comprises means for determining an available maximum acceleration value without switching from the first mode to the second mode, taking into account a maximum acceleration obtainable by the first mode, means for, on the based on a current setpoint of acceleration for the driving of the vehicle and of said maximum acceleration available, switchover in the second mode to provide a power of the heat engine (230) so as to meet the current setpoint or maintain the first mode.
6. Véhicule automobile selon la revendication 5, caractérisé en ce que l'organe de couplage glissant (220) est un embrayage à surfaces de friction. 6. Motor vehicle according to claim 5, characterized in that the sliding coupling member (220) is a clutch with friction surfaces.
7. Véhicule automobile selon la revendication 5, caractérisé en ce que l'organe de couplage glissant (220) est un convertisseur de couple. 7. Motor vehicle according to claim 5, characterized in that the sliding coupling member (220) is a torque converter.
EP18749850.6A 2017-08-18 2018-06-29 Method for switching between transmission modes in a hybrid motor vehicle Withdrawn EP3668738A1 (en)

Applications Claiming Priority (2)

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FR1757753A FR3070151B1 (en) 2017-08-18 2017-08-18 PROCESS FOR SWITCHING BETWEEN TRANSMISSION MODES ON A HYBRID MOTOR VEHICLE
PCT/FR2018/051615 WO2019034812A1 (en) 2017-08-18 2018-06-29 Method for switching between transmission modes in a hybrid motor vehicle

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FR3070151A1 (en) 2019-02-22
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CN111032398B (en) 2023-07-07
WO2019034812A1 (en) 2019-02-21

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