WO2015162346A1 - Motor vehicle comprising a hybrid power train having heat engine and energy storage device, and method of use for starting said heat engine - Google Patents

Motor vehicle comprising a hybrid power train having heat engine and energy storage device, and method of use for starting said heat engine Download PDF

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Publication number
WO2015162346A1
WO2015162346A1 PCT/FR2015/050728 FR2015050728W WO2015162346A1 WO 2015162346 A1 WO2015162346 A1 WO 2015162346A1 FR 2015050728 W FR2015050728 W FR 2015050728W WO 2015162346 A1 WO2015162346 A1 WO 2015162346A1
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Prior art keywords
engine
torque
energy storage
storage device
cvt
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PCT/FR2015/050728
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French (fr)
Inventor
Nesrine BEN BELDI
Pierre Gauthier
David Fontaine
François Malburet
Lionel ROUCOULES
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Peugeot Citroen Automobiles Sa
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Publication of WO2015162346A1 publication Critical patent/WO2015162346A1/en

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    • 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
    • B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
    • B60K6/10—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable mechanical accumulator, e.g. flywheel
    • B60K6/105—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable mechanical accumulator, e.g. flywheel the accumulator being a flywheel
    • 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
    • B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
    • B60K6/10—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable mechanical accumulator, e.g. flywheel
    • 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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B60K6/543—Transmission for changing ratio the transmission being a continuously variable transmission
    • 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
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B60W10/101—Infinitely variable gearings
    • 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
    • B60K6/26—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 motors or the generators
    • B60K2006/268—Electric drive motor starts the engine, i.e. used as starter motor
    • 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
    • B60W2710/0644—Engine speed
    • 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 present invention relates to a motor vehicle comprising a hybrid traction train with a heat engine and energy storage device, and a method of use for starting the engine.
  • Motor vehicles having a heat engine associated with wheels in a hybrid drive train comprising: a clutch (hereinafter referred to as an engine clutch) mounted between the heat engine and a continuously variable coefficient transmission device (hereinafter referred to as CVT or continuously variable transmission ratio transmission), a bridge interposed between the continuously variable transmission ratio transmission device and the wheels, and an energy storage device.
  • a clutch hereinafter referred to as an engine clutch
  • CVT continuously variable coefficient transmission device
  • CVT continuously variable transmission ratio transmission
  • the energy storage device In existing vehicles the energy storage device is intended to be used primarily for high vehicle speeds and is directly connected to the vehicle deck.
  • the linkage structure of the energy storage device is complex and poorly adapted to hybrid use in the context of urban traffic.
  • An object of the invention is to provide a hybrid vehicle particularly suitable for urban traffic, and the corresponding method of use.
  • a method for starting a heat engine associated with wheels in a hybrid traction system comprising: an engine clutch mounted between the heat engine and a transmission device is proposed according to the invention; report continuously variable transmission link, a bridge interposed between the continuously variable transmission ratio transmission device and the wheels, and a power storage device connected at the input of the continuously variable transmission ratio transmission device via a storage clutch, and to the thermal engine via the motor clutch providing a coupling with the possibility of sliding between the engine and the energy storage device, according to which, from a state in which the engine thermal shutdown, the engine clutch is open, the energy storage device is rotated, and the clutch storage is closed, the method comprises the following steps: close the motor clutch with slip so as to take out the energy storage device a couple just needed to overcome friction losses of the engine and ensure a rotati from it until reaching a start rotation speed of the engine, open the engine clutch, regulate the rotational speed of the engine to reach a speed of rotation of the engine identical to that of the device of energy storage, and close the motor clutch.
  • the regulation of the rotational speed of the heat engine is carried out on the basis of the derivative of the speed of rotation given by the formula:
  • hybrid traction chains comprising a CVT which is usually driven from the ratio of CVT defined by the ratio between the output torque and the input torque of the CVT.
  • Servo control is performed on the ratio so that the torque current at the wheel is equal to a set torque.
  • Such a servocontrol requires knowledge of the input torque of CVT.
  • the input torque of CVT is determined from the torque set at the wheel and the mapping of the specific consumption of the heat engine.
  • the hybrid traction system further comprises an energy storage device, such as a flywheel, a pneumatic energy storage member, or an electric accumulator associated with an electric machine
  • an energy storage device such as a flywheel, a pneumatic energy storage member, or an electric accumulator associated with an electric machine
  • the input torque of CVT, generated by the energy storage device is not constant due to losses occurring in the energy storage device.
  • the torque is affected by the internal friction of the flywheel. The precision of the steering is thus affected.
  • the continuously variable transmission ratio transmission device is controlled by comparing a torque setpoint to the wheel with a current value of the torque at the wheel, and modifying the ratio. of transmission according to a result of the comparison, the current value of the torque at the wheel being calculated by using a time derivative of a ratio between an input value and an output value of a calculation variable of the continuously variable transmission ratio transmission device.
  • the calculation variable is the speed of rotation
  • the current value of the torque at the wheel is given by the equation:
  • IECVT inertia view of the CVT input
  • CLDR torque relative to the law of the road of the vehicle, that is to say, resistant torque resulting from the state of the road, the deformation of the tires ...
  • the ratio derivative of CVT is capped when it reaches an upper limit given by the equation:
  • the hybrid traction system of a motor vehicle comprises in a manner known per se a heat engine 1 and the associated gearbox, coupled to the input of a CVT 2 via a clutch 3 providing a coupling with the possibility of sliding, hereinafter designated motor clutch to emphasize its vocation to separate the heat engine 1 from an immediately adjacent equipment in the power train.
  • the output of the CVT 2 is coupled to a bridge 4 to transmit a traction torque to the wheels 5 of the vehicle.
  • the CVT 2 is also connected to energy storage device 6, such as a flywheel, via a clutch 7, hereinafter referred to as a storage clutch 7 to distinguish it from the engine clutch. and emphasize its vocation to separate the energy storage device 6 from an immediately adjacent equipment in the power train.
  • energy storage device 6 such as a flywheel
  • the heat engine 1 and the energy storage device 6, and the respective clutches 3 and 7, are connected in parallel with the input of the CVT 2.
  • the traction chain further comprises a control unit 8 which receives as input a torque setpoint at the wheel CnscRoue, and data specific to the vehicle concerned, in particular data relating to cycles standardized tests called WLTC (abbreviation of Worldwide Harmonized Light Vehicles Test Cycles) which are used in the method according to the invention for determining in a known manner certain variables such as the torque relative to the road law of the vehicle, the brake torque ...
  • WLTC abbreviation of Worldwide Harmonized Light Vehicles Test Cycles
  • the control unit 8 is connected at the output to the heat engine 1, the CVT 2, to the engine clutch 3, and to the storage clutch 7 to ensure steering of the traction chain as symbolized by double arrows on the engine. Fig.
  • the control unit is used to implement the method according to the invention comprising the following steps: close the sliding motor clutch so as to take from the energy storage device a just needed torque to overcome the friction losses of the engine and ensure a rotation thereof until a starting speed of the engine of 400 rpm, open the engine clutch, regulate the speed of rotation of the engine until reaching a rotation speed of the engine identical to that of the energy storage device, and close the engine clutch.
  • the sliding of the engine clutch is preferably managed from the derivative of the rotational speed of the engine, given by the formula:
  • C PMFMot designates the loss of torque of the engine due to friction
  • CTransmissible means the torque transmissible from the energy storage device to the engine, due to the sliding of the engine clutch, and means the inertia of the engine.
  • the transmissible torque is set to zero and the engine clutch 3 is open.
  • the current value of the torque at the wheel is determined from a system of equations derived mainly from the fundamental principle of the dynamics applied to the input. of CVT, and at the end of the bridge, as well as relations relating to mechanical transmissions:
  • the invention has been illustrated with a drive train comprising a flywheel 6 and the associated storage clutch 7, mounted in parallel with the engine 1 and the associated engine clutch 3, it can be implemented by connecting the heat engine in series with the energy storage device. In this case it will be necessary to connect the heat engine to the energy storage device upstream thereof to ensure a maintenance of torque to the wheels independently of the slippage of the engine clutch.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention relates to a motor vehicle comprising a heat engine (1) associated with wheels (5) in a hybrid power train further including: an engine clutch (3) mounted between the heat engine and a transmission device having a continuously variable gear ratio (2), an axle assembly (4) inserted between the transmission device having a continuously variable gear ratio and the wheels, and an energy storage device (6) connected to the input of the transmission device having a continuously variable gear ratio via a storage clutch (7), and to the heat engine (1) via the engine clutch (3) providing a coupling with the possibility of slippage between the heat engine (1) and the energy storage device (6).

Description

VEHICULE AUTOMOBILE COMPORTANT UNE CHAINE DE TRACTION HYBRIDE À MOTEUR THERMIQUE ET DISPOSITIF DE STOCKAGE MOTOR VEHICLE COMPRISING A THERMALLY ENGINEERED HYBRID TRACTION CHAIN AND STORAGE DEVICE
D'ÉNERGIE, ET PROCÉDÉ D'UTILISATION POUR LE DÉMARRAGE DU MOTEUR THERMIQUE OF ENERGY, AND METHOD OF USE FOR STARTING THE THERMAL ENGINE
La présente invention concerne un véhicule automobile comportant une chaîne de traction hybride à moteur thermique et dispositif de stockage d'énergie, et un procédé d'utilisation pour le démarrage du moteur thermique .  The present invention relates to a motor vehicle comprising a hybrid traction train with a heat engine and energy storage device, and a method of use for starting the engine.
ARRIÈRE-PLAN DE L'INVENTION  BACKGROUND OF THE INVENTION
On connaît des véhicules automobile comportant un moteur thermique associé à des roues dans une chaîne de traction hybride comportant: un embrayage (ci-après dénommé embrayage moteur) monté entre le moteur thermique et un dispositif de transmission à coefficient continûment variable (ci-après dénommé CVT ou transmission à rapport de transmission continûment variable), un pont interposé entre le dispositif de transmission à rapport de transmission continûment variable et les roues, et un dispositif de stockage d'énergie.  Motor vehicles having a heat engine associated with wheels in a hybrid drive train comprising: a clutch (hereinafter referred to as an engine clutch) mounted between the heat engine and a continuously variable coefficient transmission device (hereinafter referred to as CVT or continuously variable transmission ratio transmission), a bridge interposed between the continuously variable transmission ratio transmission device and the wheels, and an energy storage device.
Dans les véhicules existants le dispositif de stockage d'énergie est destiné à être utilisé principalement pour des vitesses élevées du véhicule et il est directement relié au pont du véhicule. La structure de liaison du dispositif de stockage d'énergie est complexe et mal adaptée à une utilisation hybride dans le cadre d'une circulation urbaine.  In existing vehicles the energy storage device is intended to be used primarily for high vehicle speeds and is directly connected to the vehicle deck. The linkage structure of the energy storage device is complex and poorly adapted to hybrid use in the context of urban traffic.
OBJET DE L'INVENTION  OBJECT OF THE INVENTION
Un but de l'invention est de proposer un véhicule hybride particulièrement adapté à la circulation urbaine, et le procédé d'utilisation correspondant.  An object of the invention is to provide a hybrid vehicle particularly suitable for urban traffic, and the corresponding method of use.
En vue de la réalisation de ce but, on propose selon l'invention, un procédé de démarrage d'un moteur thermique associé à des roues dans une chaîne de traction hybride comprenant: un embrayage moteur monté entre le moteur thermique et un dispositif de transmission à rapport de transmission continûment variable, un pont interposé entre le dispositif de transmission à rapport de transmission continûment variable et les roues, et un dispositif de stockage d'énergie relié en entrée du dispositif de transmission à rapport de transmission continûment variable par l'intermédiaire d'un embrayage stockage, et au moteur thermique par l'intermédiaire de l'embrayage moteur assurant un accouplement avec possibilité de glissement entre le moteur thermique et le dispositif de stockage d'énergie, selon lequel, à partir d'un état dans lequel le moteur thermique est arrêté, l'embrayage moteur est ouvert, le dispositif de stockage d'énergie est en rotation, et l'embrayage stockage est fermé, le procédé comporte les étapes suivantes : fermer l'embrayage moteur avec glissement de façon à prélever sur le dispositif de stockage d'énergie un couple juste nécessaire pour vaincre les pertes par frottement du moteur thermique et assurer une mise en rotation de celui-ci jusqu'à atteindre une vitesse de rotation de démarrage du moteur thermique, ouvrir l'embrayage moteur, réguler la vitesse de rotation du moteur thermique jusqu'à atteindre une vitesse de rotation du moteur thermique identique à celle du dispositif de stockage d'énergie, et fermer l'embrayage moteur. In order to achieve this object, a method for starting a heat engine associated with wheels in a hybrid traction system comprising: an engine clutch mounted between the heat engine and a transmission device is proposed according to the invention; report continuously variable transmission link, a bridge interposed between the continuously variable transmission ratio transmission device and the wheels, and a power storage device connected at the input of the continuously variable transmission ratio transmission device via a storage clutch, and to the thermal engine via the motor clutch providing a coupling with the possibility of sliding between the engine and the energy storage device, according to which, from a state in which the engine thermal shutdown, the engine clutch is open, the energy storage device is rotated, and the clutch storage is closed, the method comprises the following steps: close the motor clutch with slip so as to take out the energy storage device a couple just needed to overcome friction losses of the engine and ensure a rotati from it until reaching a start rotation speed of the engine, open the engine clutch, regulate the rotational speed of the engine to reach a speed of rotation of the engine identical to that of the device of energy storage, and close the motor clutch.
Selon un aspect avantageux de l'invention, la régulation de la vitesse de rotation du moteur thermique est effectuée à partir de la dérivée de la vitesse de rotation donnée par la formule :
Figure imgf000004_0001
According to an advantageous aspect of the invention, the regulation of the rotational speed of the heat engine is carried out on the basis of the derivative of the speed of rotation given by the formula:
Figure imgf000004_0001
Dans laquelle,
Figure imgf000004_0002
désigne la perte de couple du moteur thermique due aux frottements, selon des données fournies par le constructeur,
Figure imgf000004_0003
désigne le couple transmissible du dispositif de stockage d'énergie au moteur, du fait du glissement de l'embrayage moteur, et désigne l'inertie du moteur. In which,
Figure imgf000004_0002
means the loss of torque of the combustion engine due to friction, according to data provided by the manufacturer,
Figure imgf000004_0003
denotes the transmissible torque of the energy storage device to the engine, due to the sliding of the engine clutch, and means the inertia of the engine.
Par ailleurs, on connaît des chaînes de traction hybride comportant un CVT qui est habituellement piloté à partir du ratio de CVT défini par le rapport entre le couple de sortie et le couple d'entrée du CVT. Un asservissement est réalisé sur le ratio afin que le couple courant à la roue soit égal à un couple de consigne. Un tel asservissement nécessite la connaissance du couple en entrée de CVT. Dans le cas d'un couple fourni par un moteur thermique, le couple en entrée de CVT est déterminé à partir du couple consigne à la roue et de la cartographie de la consommation spécifique du moteur thermique.  Furthermore, there are known hybrid traction chains comprising a CVT which is usually driven from the ratio of CVT defined by the ratio between the output torque and the input torque of the CVT. Servo control is performed on the ratio so that the torque current at the wheel is equal to a set torque. Such a servocontrol requires knowledge of the input torque of CVT. In the case of a torque supplied by a heat engine, the input torque of CVT is determined from the torque set at the wheel and the mapping of the specific consumption of the heat engine.
Lorsque la chaîne de traction hybride comporte en outre un dispositif de stockage d'énergie, tel qu'un volant d'inertie, un organe de stockage d'énergie pneumatique, ou un accumulateur électrique associé à une machine électrique, le couple en entrée de CVT, généré par le dispositif de stockage d'énergie, n'est pas constant en raison des pertes survenant dans le dispositif de stockage de l'énergie. En particulier, dans le cas d'un volant d'inertie, le couple est affecté par les frottements internes au volant d'inertie. La précision du pilotage s'en trouve donc affectée.  When the hybrid traction system further comprises an energy storage device, such as a flywheel, a pneumatic energy storage member, or an electric accumulator associated with an electric machine, the input torque of CVT, generated by the energy storage device, is not constant due to losses occurring in the energy storage device. In particular, in the case of a flywheel, the torque is affected by the internal friction of the flywheel. The precision of the steering is thus affected.
Selon une mise en œuvre avantageuse du procédé selon l'invention, le dispositif de transmission à rapport de transmission continûment variable est piloté par comparaison d'une consigne de couple à la roue avec une valeur courante du couple à la roue, et modification du rapport de transmission de transmission en fonction d'un résultat de la comparaison, la valeur courante du couple à la roue étant calculée en utilisant une dérivée par rapport au temps d'un rapport entre une valeur d'entrée et une valeur de sortie d'une variable de calcul du dispositif de transmission à rapport de transmission continûment variable. Selon un mode de mise en œuvre préféré du procédé selon l'invention, la variable de calcul est la vitesse de rotation, et la valeur courante du couple à la roue est donnée par l'équation :According to an advantageous implementation of the method according to the invention, the continuously variable transmission ratio transmission device is controlled by comparing a torque setpoint to the wheel with a current value of the torque at the wheel, and modifying the ratio. of transmission according to a result of the comparison, the current value of the torque at the wheel being calculated by using a time derivative of a ratio between an input value and an output value of a calculation variable of the continuously variable transmission ratio transmission device. According to a preferred embodiment of the method according to the invention, the calculation variable is the speed of rotation, and the current value of the torque at the wheel is given by the equation:
Figure imgf000006_0002
Dans laquelle,
Figure imgf000006_0002
In which,
Figure imgf000006_0003
Figure imgf000006_0003
désigne le ratio global de la transmission,
Figure imgf000006_0018
désigne le rendement du CVT,denotes the overall ratio of the transmission,
Figure imgf000006_0018
refers to the performance of the CVT,
Figure imgf000006_0004
Figure imgf000006_0004
est le rendement du pont, désigne le couple d'entrée
Figure imgf000006_0005
is the yield of the bridge, refers to the input torque
Figure imgf000006_0005
du CVT, donné par l'équation : of the CVT, given by the equation:
Figure imgf000006_0001
Figure imgf000006_0001
Dans laquelle,
Figure imgf000006_0006
est l'inertie du dispositif de stockage d'énergie, et
Figure imgf000006_0007
désigne la dérivée de la vitesse d'entrée du CVT, donnée par l'équation :
Figure imgf000006_0008
In which,
Figure imgf000006_0006
is the inertia of the energy storage device, and
Figure imgf000006_0007
denotes the derivative of the input velocity of the CVT, given by the equation:
Figure imgf000006_0008
Dans laquelle :  In which :
t est le temps  t is the time
= ratio du CVT = CVT ratio
= ratio du pont = bridge ratio
Figure imgf000006_0014
Figure imgf000006_0014
IECVT= inertie vue de l'entrée du CVT  IECVT = inertia view of the CVT input
CLDR= couple relatif à la loi de la route du véhicule, c'est-à-dire, couple résistant résultant de l'état de la route, de la déformation des pneus... CLDR = torque relative to the law of the road of the vehicle, that is to say, resistant torque resulting from the state of the road, the deformation of the tires ...
= couple frein sur la chaîne de transmission
Figure imgf000006_0009
= brake torque on the transmission chain
Figure imgf000006_0009
Figure imgf000006_0010
= inertie du véhicule
Figure imgf000006_0010
= inertia of the vehicle
= vitesse de rotation en entrée du CVT, et
Figure imgf000006_0011
= rotation speed at the input of the CVT, and
Figure imgf000006_0011
Figure imgf000006_0012
est le couple transmissible du dispositif de stockage d'énergie au moteur thermique.
Figure imgf000006_0012
is the transmissible torque of the energy storage device to the heat engine.
Selon une version avantageuse de l'invention, la dérivée de ratio de CVT est plafonnée lorsqu'elle atteint une limite supérieure donnée par l'équation : According to an advantageous version of the invention, the ratio derivative of CVT is capped when it reaches an upper limit given by the equation:
dans laquelle
Figure imgf000006_0015
est le ratio maximum pouvant être atteint pour le CVT, est le ratio minimum
Figure imgf000006_0016
in which
Figure imgf000006_0015
is the maximum ratio that can be achieved for the CVT, is the minimum ratio
Figure imgf000006_0016
pouvant être atteint pour le CVT, et
Figure imgf000006_0017
est le temps nécessaire, en secondes, pour passer de
Figure imgf000007_0001
àachievable for the CVT, and
Figure imgf000006_0017
is the time necessary, in seconds, to go from
Figure imgf000007_0001
at
RatlOCVTMax · RatlO CVTMax ·
BRÈVE DESCRIPTION DES DESSINS  BRIEF DESCRIPTION OF THE DRAWINGS
D'autres caractéristiques et avantages de l'invention apparaîtront encore à la lecture de la description qui suit d'un mode de mise en œuvre préféré non limitatif de l'invention en référence à la figure unique ci- ointe qui est une représentation schématique d'une chaîne de traction hybride mettant en œuvre le procédé selon l'invention.  Other features and advantages of the invention will become apparent on reading the following description of a preferred non-limiting embodiment of the invention with reference to the single figure below, which is a diagrammatic representation of the invention. a hybrid traction chain implementing the method according to the invention.
DESCRIPTION DÉTAILLÉE DE L'INVENTION  DETAILED DESCRIPTION OF THE INVENTION
En référence à la figure, la chaîne de traction hybride d'un véhicule automobile comporte de façon connue en soi un moteur thermique 1 et la boite de vitesses associée, accouplée à l'entrée d'un CVT 2 par l'intermédiaire d'un embrayage 3 assurant un accouplement avec possibilité de glissement, ci-après désigné embrayage moteur pour souligner sa vocation à permettre de séparer le moteur thermique 1 d'un équipement immédiatement voisin dans la chaîne de traction.  With reference to the figure, the hybrid traction system of a motor vehicle comprises in a manner known per se a heat engine 1 and the associated gearbox, coupled to the input of a CVT 2 via a clutch 3 providing a coupling with the possibility of sliding, hereinafter designated motor clutch to emphasize its vocation to separate the heat engine 1 from an immediately adjacent equipment in the power train.
La sortie du CVT 2 est accouplée à un pont 4 pour transmettre un couple de traction aux roues 5 du véhicule.  The output of the CVT 2 is coupled to a bridge 4 to transmit a traction torque to the wheels 5 of the vehicle.
Le CVT 2 est par ailleurs relié à dispositif de stockage d'énergie 6, tel qu'un volant d'inertie, par l'intermédiaire d'un embrayage 7, ci-après dénommé embrayage stockage 7 pour le distinguer de l'embrayage moteur et souligner sa vocation à permettre de séparer le dispositif de stockage d'énergie 6 d'un équipement immédiatement voisin dans la chaîne de traction.  The CVT 2 is also connected to energy storage device 6, such as a flywheel, via a clutch 7, hereinafter referred to as a storage clutch 7 to distinguish it from the engine clutch. and emphasize its vocation to separate the energy storage device 6 from an immediately adjacent equipment in the power train.
Dans le mode de réalisation préféré illustré, le moteur thermique 1 et le dispositif de stockage d'énergie 6, et les embrayages respectifs 3 et 7, sont reliés en parallèle à l'entrée du CVT 2.  In the preferred embodiment illustrated, the heat engine 1 and the energy storage device 6, and the respective clutches 3 and 7, are connected in parallel with the input of the CVT 2.
La chaîne de traction comporte en outre une unité de pilotage 8 qui reçoit en entrée une consigne de couple à la roue CnscRoue, et des données spécifiques au véhicule concerné, en particulier des données relatives à des cycles de tests normalisés dénommés WLTC (abréviation de l'anglais Worldwide harmonised Light vehicles Test Cycles) qui sont utilisées dans le procédé selon l'invention pour déterminer de façon connue en soi certaines variables telles que le couple relatif à la loi de route du véhicule, le couple frein... The traction chain further comprises a control unit 8 which receives as input a torque setpoint at the wheel CnscRoue, and data specific to the vehicle concerned, in particular data relating to cycles standardized tests called WLTC (abbreviation of Worldwide Harmonized Light Vehicles Test Cycles) which are used in the method according to the invention for determining in a known manner certain variables such as the torque relative to the road law of the vehicle, the brake torque ...
L'unité de pilotage 8 est reliée en sortie au moteur thermique 1, au CVT 2, à l'embrayage moteur 3, et à l'embrayage stockage 7 pour assurer un pilotage de la chaîne de traction comme symbolisé par des flèches doubles sur la figure.  The control unit 8 is connected at the output to the heat engine 1, the CVT 2, to the engine clutch 3, and to the storage clutch 7 to ensure steering of the traction chain as symbolized by double arrows on the engine. Fig.
En particulier, à partir d'un état dans lequel le moteur thermique 1 est arrêté, l'embrayage moteur 3 est ouvert, le volant d'inertie 6 est en rotation à 2000 tr/mn, et l'embrayage stockage 7 est fermé, l'unité de pilotage sert à mettre en œuvre le procédé selon l'invention comportant les étapes suivantes : fermer l'embrayage moteur avec glissement de façon à prélever sur le dispositif de stockage d'énergie un couple juste nécessaire pour vaincre les pertes par frottement du moteur thermique et assurer une mise en rotation de celui-ci jusqu'à atteindre une vitesse de rotation de démarrage du moteur thermique de 400 tr/mn, ouvrir l'embrayage moteur, réguler la vitesse de rotation du moteur thermique jusqu'à atteindre une vitesse de rotation du moteur thermique identique à celle du dispositif de stockage d'énergie, et fermer l'embrayage moteur .  In particular, from a state in which the engine 1 is stopped, the engine clutch 3 is open, the flywheel 6 is rotated at 2000 rpm, and the storage clutch 7 is closed, the control unit is used to implement the method according to the invention comprising the following steps: close the sliding motor clutch so as to take from the energy storage device a just needed torque to overcome the friction losses of the engine and ensure a rotation thereof until a starting speed of the engine of 400 rpm, open the engine clutch, regulate the speed of rotation of the engine until reaching a rotation speed of the engine identical to that of the energy storage device, and close the engine clutch.
Le glissement de l'embrayage moteur est de préférence géré à partir de la dérivée de la vitesse de rotation du moteur thermique, donnée par la formule :
Figure imgf000008_0001
The sliding of the engine clutch is preferably managed from the derivative of the rotational speed of the engine, given by the formula:
Figure imgf000008_0001
Dans laquelle, CPMFMot désigne la perte de couple du moteur thermique due aux frottements, selon des données fournies par le constructeur, CTransmissible désigne le couple transmissible du dispositif de stockage d'énergie au moteur, du fait du glissement de l'embrayage moteur, et
Figure imgf000009_0007
désigne l'inertie du moteur. In which, C PMFMot designates the loss of torque of the engine due to friction, according to data provided by the manufacturer, CTransmissible means the torque transmissible from the energy storage device to the engine, due to the sliding of the engine clutch, and
Figure imgf000009_0007
means the inertia of the engine.
Lorsque la vitesse de rotation du moteur thermique atteint la vitesse nécessaire à la mise en route du moteur thermique, ici 400tr/mn, le couple transmissible est mis à zéro et l'embrayage moteur 3 est ouvert.  When the speed of rotation of the heat engine reaches the speed necessary for starting the heat engine, here 400 rpm, the transmissible torque is set to zero and the engine clutch 3 is open.
Selon le mode de mise en œuvre préféré de l'invention, dans les différentes phases de fonctionnement, la valeur courante du couple à la roue est déterminée à partir d'un système d'équations issues principalement du principe fondamental de la dynamique appliquée en entrée de CVT, et en sortie de pont, ainsi que des relations relatives aux transmissions mécaniques :  According to the preferred embodiment of the invention, in the different operating phases, the current value of the torque at the wheel is determined from a system of equations derived mainly from the fundamental principle of the dynamics applied to the input. of CVT, and at the end of the bridge, as well as relations relating to mechanical transmissions:
Figure imgf000009_0001
Figure imgf000009_0001
Dans lesquelles, outre les désignations déjà données ci-dessus,
Figure imgf000009_0002
désigne la vitesse de rotation en sortie du CVT,
Figure imgf000009_0003
désigne le couple en entrée du CVT,
Figure imgf000009_0004
désigne le couple en sortie de boite de vitesse, désigne le couple en sortie du CVT, désigne le
Figure imgf000009_0006
In which, in addition to the designations already given above,
Figure imgf000009_0002
designates the rotation speed at the output of the CVT,
Figure imgf000009_0003
denotes the input torque of the CVT,
Figure imgf000009_0004
designates the torque at the output of the gearbox, designates the torque at the output of the CVT, designates the
Figure imgf000009_0006
couple courant à la roue, et désigne la dérivée par
Figure imgf000009_0005
torque running to the wheel, and denotes the derivative by
Figure imgf000009_0005
rapport au temps de la vitesse de rotation de la roue.  relative to the time of the rotational speed of the wheel.
De ce système d'équations, on extait l'équation de pilotage :
Figure imgf000010_0002
From this system of equations, the driving equation was extracted:
Figure imgf000010_0002
Qui permet de calculer le couple en entrée du CVT au moyen de l'équation : Which calculates the input torque of the CVT using the equation:
Figure imgf000010_0001
Figure imgf000010_0001
Et par voie de conséquence, le couple courant à la roue donné par l'équation : And as a consequence, the current torque at the wheel given by the equation:
Figure imgf000010_0003
Figure imgf000010_0003
Lors de la mise en œuvre dans la boucle d'asservissement la valeur du terme
Figure imgf000010_0004
When implementing in the servo loop the value of the term
Figure imgf000010_0004
est plafonnée à la valeur  is capped at the value
donnée par l'équation
Figure imgf000010_0005
Figure imgf000010_0006
given by the equation
Figure imgf000010_0005
Figure imgf000010_0006
Bien entendu l'invention n'est pas limitée au mode de mise en œuvre décrit et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention telle que définie par les revendications.  Naturally, the invention is not limited to the embodiment described, and alternative embodiments can be made without departing from the scope of the invention as defined by the claims.
En particulier, bien que l'invention ait été illustrée avec une chaîne de traction comportant un volant d'inertie 6 et l'embrayage stockage 7 associé, montés en parallèle au moteur thermique 1 et l'embrayage moteur 3 associé, elle peut être mise en œuvre en reliant le moteur thermique en série avec le dispositif de stockage d'énergie. Dans ce cas il conviendra de relier le moteur thermique au dispositif de stockage d'énergie en amont de celui-ci afin d'assurer un maintien du couple aux roues indépendamment du glissement de l'embrayage moteur.  In particular, although the invention has been illustrated with a drive train comprising a flywheel 6 and the associated storage clutch 7, mounted in parallel with the engine 1 and the associated engine clutch 3, it can be implemented by connecting the heat engine in series with the energy storage device. In this case it will be necessary to connect the heat engine to the energy storage device upstream thereof to ensure a maintenance of torque to the wheels independently of the slippage of the engine clutch.
Il est également possible d'utiliser un autre dispositif de stockage d'énergie, tel qu'un dispositif pneumatique ou électrique, en prévoyant des modifications appropriées de l'équation de pilotage.  It is also possible to use another energy storage device, such as a pneumatic or electrical device, with appropriate modifications of the control equation.

Claims

REVENDICATIONS
1. Procédé de démarrage d'un moteur thermique (1) associé à des roues (5) dans une chaîne de traction hybride comprenant: un embrayage moteur (3) monté entre le moteur thermique et un dispositif de transmission à rapport de transmission continûment variable (2), un pont (4) interposé entre le dispositif de transmission à rapport de transmission continûment variable et les roues, et un dispositif de stockage d'énergie (6) relié en entrée du dispositif de transmission à rapport de transmission continûment variable par l'intermédiaire d'un embrayage stockage, et au moteur thermique par l'intermédiaire de l'embrayage moteur assurant un accouplement avec possibilité de glissement entre le moteur thermique et le dispositif de stockage d'énergie, caractérisé en ce qu'à partir d'un état dans lequel le moteur thermique est arrêté, l'embrayage moteur est ouvert, le dispositif de stockage d'énergie est en rotation, et l'embrayage stockage est fermé, le procédé comporte les étapes suivantes : fermer l'embrayage moteur avec glissement de façon à prélever sur le dispositif de stockage d'énergie un couple juste nécessaire pour vaincre les pertes par frottement du moteur thermique et assurer une mise en rotation de celui-ci jusqu'à atteindre une vitesse de rotation de démarrage du moteur thermique, ouvrir l'embrayage moteur, réguler la vitesse de rotation du moteur thermique jusqu'à atteindre une vitesse de rotation du moteur thermique identique à celle du dispositif de stockage d'énergie, et fermer l'embrayage moteur.  A method of starting a heat engine (1) associated with wheels (5) in a hybrid drivetrain comprising: an engine clutch (3) mounted between the engine and a continuously variable transmission ratio transmission device (2), a bridge (4) interposed between the continuously variable transmission ratio transmission device and the wheels, and an energy storage device (6) connected at the input of the continuously variable transmission ratio transmission device by through a clutch storage, and the engine through the engine clutch ensuring a coupling with the possibility of sliding between the engine and the energy storage device, characterized in that from a state in which the engine is stopped, the engine clutch is open, the energy storage device is in rotation, and the clutch storage is closed, the compo the following steps: close the sliding motor clutch so as to take from the energy storage device a torque just necessary to overcome the friction losses of the engine and ensure a rotation thereof to to reach a starting rotation speed of the engine, open the engine clutch, regulate the rotational speed of the engine until reaching a rotation speed of the engine identical to that of the energy storage device, and close the engine motor clutch.
2. Procédé selon la revendication 1 caractérisé en ce que la régulation de la vitesse de rotation du moteur thermique est effectuée à partir de la dérivée de la vitesse de rotation donnée par la formule :
Figure imgf000011_0001
Dans laquelle, CpMFMot désigne la perte de couple du moteur thermique due aux frottements, selon des données fournies par le constructeur, CTransmissible désigne le couple transmissible du dispositif de stockage d'énergie au moteur, du fait du glissement de l'embrayage moteur, et /Mot désigne l'inertie du moteur. 2. Method according to claim 1 characterized in that the regulation of the rotational speed of the engine is performed from the derivative of the speed of rotation given by the formula:
Figure imgf000011_0001
In which, CpMFMot designates the loss of torque of the engine due to friction, according to data provided by the manufacturer, CTransmissible means the transmissible torque of the energy storage device to the engine, due to the sliding of the engine clutch, and / Word means the inertia of the motor.
Procédé selon la revendication 1 caractérisé en ce que pour une vitesse de rotation de 2000 tr/mn du dispositif de stockage d'énergie, la vitesse de rotation de démarrage est fixée à 400 tr/mn.  A method according to claim 1 characterized in that for a speed of rotation of 2000 rpm of the energy storage device, the startup speed is set at 400 rpm.
Procédé selon la revendication 1 caractérisé en ce que le dispositif de transmission à rapport de transmission continûment variable est piloté par comparaison d'une consigne de couple à la roue avec une valeur courante du couple à la roue, et modification du rapport de transmission de transmission en fonction d'un résultat de la comparaison, la valeur courante du couple à la roue étant calculée en utilisant une dérivée par rapport au temps d'un rapport entre une valeur d'entrée et une valeur de sortie d'une variable de calcul du dispositif de transmission à rapport de transmission continûment variable .  Method according to Claim 1, characterized in that the continuously variable transmission ratio transmission device is controlled by comparing a torque setpoint with the wheel with a current value of the torque at the wheel, and modifying the transmission transmission ratio. based on a result of the comparison, the current value of the torque at the wheel being calculated using a time derivative of a ratio between an input value and an output value of a calculation variable of the transmission device with continuously variable transmission ratio.
Procédé selon la revendication 4 caractérisé en ce que la variable de calcul est la vitesse de rotation en entrée du dispositif de transmission à rapport de transmission continûment variable (CVT) dont la dérivée est donnée par l'équation :
Figure imgf000012_0001
Method according to Claim 4, characterized in that the calculation variable is the rotational speed at the input of the continuously variable transmission ratio transmission device (CVT) whose derivative is given by the equation:
Figure imgf000012_0001
dans laquelle : t est le temps,
Figure imgf000012_0002
désigne le rendement du CVT, RatioCVT = ratio du CVT,
Figure imgf000012_0003
t= ratio du pont,
Figure imgf000012_0006
inertie vue de l'entrée du CVT, CLDR= couple relatif à la loi de la route du véhicule, CFrein = couple frein sur la chaîne de transmission,
Figure imgf000012_0004
= inertie du véhicule, = vitesse de rotation en entrée du
Figure imgf000012_0005
CVT, est Ie rendement du pont, désigne le
Figure imgf000013_0010
Figure imgf000013_0001
where: t is the time,
Figure imgf000012_0002
refers to the CVT yield, CVT Ratio = CVT ratio,
Figure imgf000012_0003
t = ratio of the bridge,
Figure imgf000012_0006
inertia seen from the CVT input, CLDR = torque relative to the law of the vehicle road, CFrein = brake torque on the transmission chain,
Figure imgf000012_0004
= vehicle inertia, = rotational speed at the input of
Figure imgf000012_0005
CVT, is the performance of the bridge, means the
Figure imgf000013_0010
Figure imgf000013_0001
couple d'entrée du CVT,
Figure imgf000013_0002
désigne le couple transmissible du dispositif de stockage d'énergie au moteur thermique. CVT input torque,
Figure imgf000013_0002
denotes the transmissible torque of the energy storage device to the heat engine.
Procédé selon la revendication 5 caractérisé en ce que le terme :
Figure imgf000013_0003
Process according to Claim 5, characterized in that the term:
Figure imgf000013_0003
A une valeur plafonnée à une valeur  At a value capped at a value
donnée par l'équation :
Figure imgf000013_0004
given by the equation:
Figure imgf000013_0004
dans laquelle est le ratio maximum pouvant
Figure imgf000013_0005
in which is the maximum ratio that can
Figure imgf000013_0005
être atteint pour le CVT, est le ratio minimum
Figure imgf000013_0006
to be achieved for the CVT, is the minimum ratio
Figure imgf000013_0006
pouvant être atteint pour le CVT, et
Figure imgf000013_0007
est le temps nécessaire, en secondes, pour passer de à
Figure imgf000013_0009
achievable for the CVT, and
Figure imgf000013_0007
is the time it takes, in seconds, to go from
Figure imgf000013_0009
Figure imgf000013_0008
Figure imgf000013_0008
PCT/FR2015/050728 2014-04-24 2015-03-24 Motor vehicle comprising a hybrid power train having heat engine and energy storage device, and method of use for starting said heat engine WO2015162346A1 (en)

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WO2010087705A1 (en) * 2009-01-27 2010-08-05 Dti Group B.V. Flywheel module
WO2011120492A1 (en) * 2010-03-29 2011-10-06 Schaeffler Technologies Gmbh & Co. Kg Drive assembly for a motor vehicle
FR2981886A1 (en) * 2011-11-02 2013-05-03 Denis Ernest Celestin Buffet Hybrid vehicle, has epicyclic gears whose control shafts are alternatively coupled to electric generator and fly wheel, where wheel axles of epicyclic gears drive bridge, and driving shafts of epicyclic gears are driven by thermal engine
WO2013175165A1 (en) * 2012-05-25 2013-11-28 City University Variator

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