EP1819933A1 - Method and system for controlling a motor vehicle comprising an actuator-operated clutch - Google Patents
Method and system for controlling a motor vehicle comprising an actuator-operated clutchInfo
- Publication number
- EP1819933A1 EP1819933A1 EP05819329A EP05819329A EP1819933A1 EP 1819933 A1 EP1819933 A1 EP 1819933A1 EP 05819329 A EP05819329 A EP 05819329A EP 05819329 A EP05819329 A EP 05819329A EP 1819933 A1 EP1819933 A1 EP 1819933A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clutch
- point
- licking
- vehicle
- engine
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000007935 neutral effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000000750 progressive effect Effects 0.000 claims description 4
- 230000010365 information processing Effects 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 230000006399 behavior Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000036461 convulsion Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18018—Start-stop drive, e.g. in a traffic jam
-
- 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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/1015—Input shaft speed, e.g. turbine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/104—Clutch
- F16D2500/10406—Clutch position
- F16D2500/10412—Transmission line of a vehicle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/10—System to be controlled
- F16D2500/104—Clutch
- F16D2500/10443—Clutch type
- F16D2500/1045—Friction clutch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/304—Signal inputs from the clutch
- F16D2500/3041—Signal inputs from the clutch from the input shaft
- F16D2500/30415—Speed of the input shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/306—Signal inputs from the engine
- F16D2500/3069—Engine ignition switch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/502—Relating the clutch
- F16D2500/50245—Calibration or recalibration of the clutch touch-point
- F16D2500/50251—During operation
- F16D2500/50263—During standing still
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/502—Relating the clutch
- F16D2500/50245—Calibration or recalibration of the clutch touch-point
- F16D2500/50266—Way of detection
- F16D2500/50272—Gearing speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/508—Relating driving conditions
- F16D2500/50883—Stop-and-go, i.e. repeated stopping and starting, e.g. in traffic jams
Definitions
- the invention relates to a method and a control system for a motor vehicle with a controlled clutch equipped with an automatic engine stop and restart device.
- This device for stopping and restarting the engine automatically (or "Stop and Go" device according to a terminology commonly used) is primarily intended to reduce fuel consumption, especially in the city at a stop at traffic lights and in traffic jams , and to consequently reduce the pollution of the atmosphere by the exhaust gases of the engine of the vehicle.
- This device is advantageously used in combination with an actuator clutch control, which is associated with a robotized gearbox, an automatic gearbox or a manual gearbox with a clutch pedal acting by electrical connection.
- the clutch control by an actuator requires a determination of the licking point of the clutch, that is to say the point on the most advanced clutch curve in the direction of the clutch for which one does not still transmits no torque, and a follow-up of the evolution of this point, to avoid shocks and jerks in the transmission of the vehicle during the controlled actuations of the clutch.
- the invention particularly aims a method for determining the licking point of a clutch driven in a vehicle equipped with a device for stopping and starting automatic engine of the aforementioned type, this determination being performed in masked time and without degrading the behavior of the vehicle and the comfort of driving.
- It proposes for this purpose a method of controlling a vehicle automobile comprising a clutch controlled by an actuator and a device for stopping and restarting the engine automatically under predetermined conditions, in particular comprising a neutral position of the gearbox, which consists in determining the licking point of the clutch during the the interval of time preceding the stopping of the engine of the vehicle when this stop is controlled by the aforementioned device.
- the method according to the invention therefore takes advantage, to determine the licking point of the clutch, the time interval between the effective stop engine stop order given by the aforementioned device when the conditions wanted are met. This time interval is short, typically about one second, but sufficient to make this determination which, when performed under these conditions, takes place when the vehicle is stopped and does not harm the behavior of the vehicle and the comfort driving.
- this method also consists in determining the licking point of the clutch at each stop of the engine controlled by the aforementioned device.
- the invention also provides for inhibiting or stopping the determination of the licking point if the aforesaid time interval is too short for this determination.
- this method also consists in detecting the position of the licking point of the clutch by detecting the the rotation of a primary shaft of the vehicle gearbox.
- the method according to the invention consists in detecting the point of licking of the clutch by progressive closing of the clutch from its open position, the speed of rotation of the motor being greater than or equal to a predetermined minimum value, and by ré ⁇ opening of the clutch.
- This determination of the licking point is totally transparent for the driver or passengers of the vehicle: it is sufficient indeed, the clutch being open, the gearbox being in the neutral or dead position and the primary shaft of the gearbox being stopped (the vehicle being in principle stopped), partially closing the clutch until detection of the rotation of the primary shaft of the vehicle gearbox after which the clutch is opened again to return to the initial condition.
- the clutch is controlled by an actuator comprising a movable element whose displacement corresponds to the opening and closing of the clutch
- the method according to the invention consists in detecting and recording the position of this movable element of the clutch. actuator when it corresponds to the licking point of the clutch.
- the time interval between the stop command given by the aforementioned device and the actual stopping of the motor is also used to search for the previously recorded value of the licking point of the clutch, or the corresponding position of the clutch. moving element of the clutch actuator, before making a new determination of the licking point. This makes it possible to directly observe the evolution of the licking point.
- the invention also proposes a motor vehicle control system intended for the execution of the method described above, this system being characterized in that it comprises means for detecting and recording the position of an element.
- movable actuator acting on the clutch of the vehicle means for detecting the rotation or the speed of rotation of a primary shaft of the box.
- vehicle speeds and information processing means connected to the aforementioned means of detection and to the aforementioned device for automatically stopping and restarting the engine and programmed to control the actuator in the direction of closing the clutch and for registering the position of the movable element of the actuator corresponding to a rotation of the gearbox primary shaft from a zero rotation, during the period of time preceding the stopping of the engine being driven by the aforementioned device.
- the controlled clutch and the device for stopping and restarting the engine automatically, means of "creeping” (moving the vehicle at a very slow speed) to the release of the brake pedal by the driver, which forces the driver to press this pedal to prevent the vehicle from moving and thus allows the engine to stop, if the conditions are met, by the aforementioned automatic stop and restart device.
- auxiliary means of regulating the temperature of the passenger compartment of the vehicle when the engine is stopped by the aforementioned automatic stop and restart device are also possible, when the vehicle is equipped with an air conditioning device, auxiliary means of regulating the temperature of the passenger compartment of the vehicle when the engine is stopped by the aforementioned automatic stop and restart device.
- auxiliary means it is possible, for example, with these auxiliary means, to constitute a reserve of cold (or hot) when the engine rotates and use this reserve when the engine is stopped by the aforementioned device for stopping and automatic restart.
- means for detecting the position of the vehicle on a hill-side terrain comprising, for example, an inclinometer, for preventing the aforementioned device from stopping the engine if the predicted conditions are met. This avoids the recoil of the vehicle when restarting the engine, which would most often result in a shock or a jerk in the transmission.
- the brake locking means to the aforementioned means for releasing the brakes only after detecting the passage of a torque in the controlled clutch, which prevents the vehicle from backing up hill at engine restart.
- FIG. 1 shows schematically a control system according to the invention
- FIG. 2 is a general flowchart of the various operations of the control method according to the invention.
- the control system according to the invention is intended to equip a motor vehicle comprising an internal combustion engine 10 of a conventional type, the output shaft 12 is connected by a clutch E to an input shaft or primary shaft 14 of a gearbox 16, such as for example a robotized mechanical gearbox, whose output shaft 18 drives the drive wheels 20 of the vehicle via a differential 22.
- the clutch E is driven by an actuator 24, for example of the electrical or fluidic type, comprising a movable actuating element of the clutch.
- the vehicle is also equipped with a device 26 for stopping and restarting the engine automatically or "Stop and Go" device, essentially comprising a reversible alternator-starter controlled by a computer 28 conventionally comprising one or more microprocessors, memories , and input-output interfaces, this computer can also control, inter alia, the actuator 24 of the clutch E and the gearbox 16.
- a device 26 for stopping and restarting the engine automatically or "Stop and Go" device essentially comprising a reversible alternator-starter controlled by a computer 28 conventionally comprising one or more microprocessors, memories , and input-output interfaces, this computer can also control, inter alia, the actuator 24 of the clutch E and the gearbox 16.
- the automatic stopping and restarting device 26 is for controlling the stopping of the vehicle engine 10 to reduce fuel consumption when certain conditions are met, including:
- the gearbox 16 is in the neutral position (or in neutral);
- the rotational speed of the output shaft 12 of the motor 10 is greater than or equal to a predetermined minimum value corresponding for example approximately to the idle speed;
- the vehicle is at a standstill (its traveling speed is zero) or its speed is very low, for example less than 2 km / h. These conditions may also include driver support on the brake pedal.
- a stop command of the motor 10 is given by the computer 28 and causes the actual stopping of the motor 10 with a response time which is typically less than one second. This time interval is sufficient for the search of the licking point previously determined and for a new determination of the licking point, which essentially consists of:
- the detection of the licking point of the clutch E is done without modifying the conditions for stopping the engine 10 by the device for stopping and restarting the engine automatically. If the time interval between the stop command and the actual stopping of the engine is too short to allow a determination of the clutch licking point as indicated, and if the determination is started, this is discontinued. determination and restoring the actuator to the initial position, the stop being given priority over the determination in progress.
- the determination 46 of the licking point of the clutch E comprises the control of the actuator 24, the detection of the rotation of the primary shaft 14 of the gearbox and the recording of the position of the movable element of the actuator 24, then the re-opening of the clutch.
- the next operation 48 is the actual stopping of the engine 10 of the vehicle, which is followed by the restarting of the engine 50 by the device 26, when the driver indicates his intention to restart the vehicle. It is also possible to determine the licking point in other conditions, for example when the engine is started cold, when the driver stops the engine, during all stops, or some of them, by the device. "Stop and Go".
- the stops at which this determination is made are determined according to certain parameters, such as the time elapsed or the distance traveled since a previous determination, the number of actuations of the clutch, the engine temperature (a rise in temperature causing a variation of the licking point due to thermal expansion).
- the invention is applicable to a clutch comprising or not an internal friction wear compensating system, the invention allowing in the first case to monitor the proper operation of the wear-compensating system, for example by giving information by a diagnostic system accessible to a repairer.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a method and system for controlling a motor vehicle comprising an actuator-operated clutch (E), which is equipped with a device (26) for automatically stopping and restarting the engine (10) in pre-determined conditions, in which the biting point of the actuator-operated clutch (E) is determined during the period of time preceding the stopping of the engine (10) of the vehicle which is controlled by said device (26).
Description
PROCEDE ET SYSTEME DE COMMANDE D'UN VEHICULE AUTOMOBILE A EMBRAYAGE PILOTE METHOD AND SYSTEM FOR CONTROLLING A MOTOR VEHICLE WITH PILOT CLUTCH
L'invention concerne un procédé et un système de commande d'un véhicule automobile à embrayage piloté équipé d'un dispositif d'arrêt et de redémarrage automatiques du moteur.The invention relates to a method and a control system for a motor vehicle with a controlled clutch equipped with an automatic engine stop and restart device.
Ce dispositif d'arrêt et de redémarrage automatiques du moteur (ou dispositif « Stop and Go » selon une terminologie couramment utilisée) est essentiellement destiné à réduire la consommation en carburant, notamment en ville à l'arrêt aux feux de circulation et dans les embouteillages, et à réduire par voie de conséquence la pollution de l'atmosphère par les gaz d'échappement du moteur du véhicule.This device for stopping and restarting the engine automatically (or "Stop and Go" device according to a terminology commonly used) is primarily intended to reduce fuel consumption, especially in the city at a stop at traffic lights and in traffic jams , and to consequently reduce the pollution of the atmosphere by the exhaust gases of the engine of the vehicle.
Ce dispositif est avantageusement utilisé en combinaison avec une commande d'embrayage par actionneur, qui est associée à une boîte de vitesses robotisée, une boîte de vitesses automatique ou une boîte de vitesses manuelle avec une pédale de débrayage agissant par liaison électrique. La commande de l'embrayage par un actionneur nécessite une détermination du point de léchage de l'embrayage, c'est-à-dire du point sur la courbe d'embrayage le plus avancé dans la direction de l'embrayage pour lequel on ne transmet toujours pas de couple, et un suivi de l'évolution de ce point, pour éviter des chocs et des à-coups dans la transmission du véhicule lors des actionnements commandés de l'embrayage.This device is advantageously used in combination with an actuator clutch control, which is associated with a robotized gearbox, an automatic gearbox or a manual gearbox with a clutch pedal acting by electrical connection. The clutch control by an actuator requires a determination of the licking point of the clutch, that is to say the point on the most advanced clutch curve in the direction of the clutch for which one does not still transmits no torque, and a follow-up of the evolution of this point, to avoid shocks and jerks in the transmission of the vehicle during the controlled actuations of the clutch.
Différents modes de détermination de ce point ont déjà été proposés dans la technique, mais ne donnent pas toujours satisfaction et sont parfois peu faciles à mettre en œuvre.Different modes of determining this point have already been proposed in the art, but do not always give satisfaction and are sometimes not easy to implement.
L'invention a notamment pour but un procédé permettant de déterminer le point de léchage d'un embrayage piloté dans un véhicule équipé d'un dispositif d'arrêt et de démarrage automatiques du moteur du type précité, cette détermination étant effectuée en temps masqué et sans dégrader le comportement du véhicule et le confort de conduite.The invention particularly aims a method for determining the licking point of a clutch driven in a vehicle equipped with a device for stopping and starting automatic engine of the aforementioned type, this determination being performed in masked time and without degrading the behavior of the vehicle and the comfort of driving.
Elle propose à cet effet un procédé de commande d'un véhicule
automobile comprenant un embrayage commandé par un actionneur et un dispositif d'arrêt et de redémarrage automatiques du moteur dans des conditions prédéterminées comprenant en particulier une position neutre de la boîte de vitesses, qui consiste à déterminer le point de léchage de l'embrayage durant l'intervalle de temps qui précède l'arrêt du moteur du véhicule quand cet arrêt est commandé par le dispositif précité.It proposes for this purpose a method of controlling a vehicle automobile comprising a clutch controlled by an actuator and a device for stopping and restarting the engine automatically under predetermined conditions, in particular comprising a neutral position of the gearbox, which consists in determining the licking point of the clutch during the the interval of time preceding the stopping of the engine of the vehicle when this stop is controlled by the aforementioned device.
Le procédé selon l'invention met donc à profit, pour déterminer le point de léchage de l'embrayage, l'intervalle de temps qui sépare l'arrêt effectif du moteur de l'ordre d'arrêt donné par le dispositif précité quand les conditions voulues sont réunies. Cet intervalle de temps est court, typiquement d'une seconde environ, mais suffisant pour procéder à cette détermination qui, lorsqu'elle est réalisée dans ces conditions, a lieu quand le véhicule est arrêté et ne nuit pas au comportement du véhicule et au confort de conduite. Selon une autre caractéristique de l'invention, ce procédé consiste également à déterminer le point de léchage de l'embrayage à chaque arrêt du moteur commandé par le dispositif précité.The method according to the invention therefore takes advantage, to determine the licking point of the clutch, the time interval between the effective stop engine stop order given by the aforementioned device when the conditions wanted are met. This time interval is short, typically about one second, but sufficient to make this determination which, when performed under these conditions, takes place when the vehicle is stopped and does not harm the behavior of the vehicle and the comfort driving. According to another characteristic of the invention, this method also consists in determining the licking point of the clutch at each stop of the engine controlled by the aforementioned device.
Cela permet de suivre avec précision l'évolution du point de léchage en fonction des conditions environnementales et de fonctionnement du moteur et du véhicule, et donc de pouvoir commander avec précision l'actionnement de l'embrayage piloté pour ne pas nuire au comportement du véhicule et au confort de conduite.This makes it possible to precisely follow the evolution of the licking point according to the environmental and operating conditions of the engine and the vehicle, and thus to be able to precisely control the actuation of the controlled clutch in order not to harm the behavior of the vehicle. and driving comfort.
L'invention prévoit également d'inhiber ou d'arrêter la détermination du point de léchage si l'intervalle de temps précité est trop court pour cette détermination.The invention also provides for inhibiting or stopping the determination of the licking point if the aforesaid time interval is too short for this determination.
On évite ainsi de retarder l'arrêt du moteur du véhicule, quand cet arrêt a été commandé par le dispositif d'arrêt et de redémarrage automatiques précité et on effectue la détermination du point de léchage à l'arrêt suivant. De façon préférée selon l'invention, ce procédé consiste également à détecter la position du point de léchage de l'embrayage par détection de
la rotation d'un arbre primaire de la boîte de vitesses du véhicule.This avoids delaying the stopping of the engine of the vehicle, when this stop was controlled by the aforementioned automatic stopping and restarting device and the determination of the licking point at the next stop. In a preferred manner according to the invention, this method also consists in detecting the position of the licking point of the clutch by detecting the the rotation of a primary shaft of the vehicle gearbox.
De façon pratique, le procédé selon l'invention consiste à détecter le point de léchage de l'embrayage par fermeture progressive de l'embrayage depuis sa position ouverte, la vitesse de rotation du moteur étant supérieure ou égale à une valeur minimale prédéterminée, et par ré¬ ouverture de l'embrayage.In a practical way, the method according to the invention consists in detecting the point of licking of the clutch by progressive closing of the clutch from its open position, the speed of rotation of the motor being greater than or equal to a predetermined minimum value, and by ré¬ opening of the clutch.
Cette détermination du point de léchage est totalement transparente pour le conducteur ou les passagers du véhicule : il suffit en effet, l'embrayage étant ouvert, la boîte de vitesses étant en position neutre ou point mort et l'arbre primaire de la boîte de vitesses étant à l'arrêt (le véhicule étant en principe arrêté), de fermer partiellement l'embrayage jusqu'à détection de la mise en rotation de l'arbre primaire de la boîte de vitesses du véhicule après quoi on ouvre à nouveau l'embrayage pour revenir à la condition initiale. Comme l'embrayage est piloté par un actionneur comportant un élément mobile dont le déplacement correspond à l'ouverture et à la fermeture de l'embrayage, le procédé selon l'invention consiste à détecter et à enregistrer la position de cet élément mobile de l'actionneur lorsqu'elle correspond au point de léchage de l'embrayage. L'intervalle de temps qui sépare l'ordre d'arrêt donné par le dispositif précité et l'arrêt effectif du moteur est aussi utilisé pour rechercher la valeur précédemment enregistrée du point de léchage de l'embrayage, ou de la positon correspondante de l'élément mobile de l'actionneur de l'embrayage, avant de procéder à une nouvelle détermination du point de léchage. Cela permet de constater directement l'évolution du point de léchage.This determination of the licking point is totally transparent for the driver or passengers of the vehicle: it is sufficient indeed, the clutch being open, the gearbox being in the neutral or dead position and the primary shaft of the gearbox being stopped (the vehicle being in principle stopped), partially closing the clutch until detection of the rotation of the primary shaft of the vehicle gearbox after which the clutch is opened again to return to the initial condition. Since the clutch is controlled by an actuator comprising a movable element whose displacement corresponds to the opening and closing of the clutch, the method according to the invention consists in detecting and recording the position of this movable element of the clutch. actuator when it corresponds to the licking point of the clutch. The time interval between the stop command given by the aforementioned device and the actual stopping of the motor is also used to search for the previously recorded value of the licking point of the clutch, or the corresponding position of the clutch. moving element of the clutch actuator, before making a new determination of the licking point. This makes it possible to directly observe the evolution of the licking point.
L'invention propose également un système de commande de véhicule automobile, destiné à l'exécution du procédé décrit ci-dessus, ce système étant caractérisé en ce qu'il comprend des moyens de détection et d'enregistrement de la position d'un élément mobile de l'actionneur agissant sur l'embrayage du véhicule, des moyens de détection de la rotation ou de la vitesse de rotation d'un arbre primaire de la boîte de
vitesses du véhicule et des moyens de traitement de l'information reliés aux moyens précités de détection et au dispositif précité d'arrêt et de redémarrage automatiques du moteur et programmés pour commander l'actionneur dans le sens de la fermeture de l'embrayage et pour enregistrer la position de l'élément mobile de l'actionneur correspondant à une mise en rotation de l'arbre primaire de la boîte de vitesses à partir d'une rotation nulle, pendant l'intervalle de temps qui précède l'arrêt du moteur commandé par le dispositif précité.The invention also proposes a motor vehicle control system intended for the execution of the method described above, this system being characterized in that it comprises means for detecting and recording the position of an element. movable actuator acting on the clutch of the vehicle, means for detecting the rotation or the speed of rotation of a primary shaft of the box. vehicle speeds and information processing means connected to the aforementioned means of detection and to the aforementioned device for automatically stopping and restarting the engine and programmed to control the actuator in the direction of closing the clutch and for registering the position of the movable element of the actuator corresponding to a rotation of the gearbox primary shaft from a zero rotation, during the period of time preceding the stopping of the engine being driven by the aforementioned device.
De façon avantageuse, d'autres moyens peuvent être prévus dans le système selon l'invention pour améliorer ses performances ainsi que l'agrément de l'utilisation du véhicule et le confort de conduite.Advantageously, other means may be provided in the system according to the invention to improve its performance as well as the approval of the use of the vehicle and the comfort of driving.
Par exemple, on peut prévoir d'associer à l'embrayage piloté et au dispositif d'arrêt et de redémarrage automatiques du moteur, des moyens de « creeping » (déplacement du véhicule à vitesse très lente) au lâcher de la pédale de frein par le conducteur, ce qui oblige le conducteur à appuyer sur cette pédale pour empêcher le véhicule de se déplacer et permet donc l'arrêt du moteur, si les conditions prévues sont réunies, par le dispositif précité d'arrêt et de redémarrage automatiques.For example, it can be provided to associate the controlled clutch and the device for stopping and restarting the engine automatically, means of "creeping" (moving the vehicle at a very slow speed) to the release of the brake pedal by the driver, which forces the driver to press this pedal to prevent the vehicle from moving and thus allows the engine to stop, if the conditions are met, by the aforementioned automatic stop and restart device.
On peut également prévoir, quand le véhicule est équipé d'un dispositif de climatisation, des moyens annexes de la régulation de la température de l'habitacle du véhicule quand le moteur est arrêté par le dispositif précité d'arrêt et de redémarrage automatiques.It is also possible, when the vehicle is equipped with an air conditioning device, auxiliary means of regulating the temperature of the passenger compartment of the vehicle when the engine is stopped by the aforementioned automatic stop and restart device.
On peut par exemple, avec ces moyens annexes, constituer une réserve de froid (ou de chaud) quand le moteur tourne et se servir de cette réserve quand le moteur est arrêté par le dispositif précité d'arrêt et de redémarrage automatique.It is possible, for example, with these auxiliary means, to constitute a reserve of cold (or hot) when the engine rotates and use this reserve when the engine is stopped by the aforementioned device for stopping and automatic restart.
On peut aussi prévoir des moyens de détection de la position du véhicule sur un terrain en côte, ces moyens comprenant par exemple un inclinomètre, pour empêcher le dispositif précité d'arrêter le moteur si les conditions prévues sont réunies. On évite ainsi le recul du véhicule au redémarrage du moteur, qui se traduirait le plus souvent par un choc ou un
à-coup dans la transmission. On peut également prévoir d'associer des moyens de blocage de frein aux moyens précités pour relâcher les freins seulement après détection du passage d'un couple dans l'embrayage piloté, ce qui évite le recul du véhicule en côte au redémarrage du moteur. Dans certains cas, il est également envisageable de détecter la position du point de léchage de l'embrayage piloté, non pas à l'arrêt du véhicule dans l'intervalle de temps qui précède immédiatement l'arrêt du moteur commandé par le dispositif précité d'arrêt et de redémarrage automatiques, mais pendant le déplacement du véhicule au passage d'une vitesse inférieure, le point de léchage étant déterminé lors de la fermeture de l'embrayage par détection du point d'inflexion de la vitesse de rotation de l'arbre de sortie du moteur.It is also possible to provide means for detecting the position of the vehicle on a hill-side terrain, these means comprising, for example, an inclinometer, for preventing the aforementioned device from stopping the engine if the predicted conditions are met. This avoids the recoil of the vehicle when restarting the engine, which would most often result in a shock or a jerk in the transmission. It is also possible to associate the brake locking means to the aforementioned means for releasing the brakes only after detecting the passage of a torque in the controlled clutch, which prevents the vehicle from backing up hill at engine restart. In certain cases, it is also conceivable to detect the position of the licking point of the driven clutch, not at the standstill of the vehicle in the time interval immediately preceding the stopping of the engine controlled by the above-mentioned device. automatic stop and restart, but during the movement of the vehicle at the passage of a lower speed, the licking point being determined when closing the clutch by detecting the point of inflection of the speed of rotation of the motor output shaft.
L'embrayage précité peut, ou non, comprendre des moyens automatiques de rattrapage d'usure. L'invention sera mieux comprise et d'autres caractéristiques, détails et avantages de celles-ci apparaîtront plus clairement à la lecture de la description qui suit, faite à titre d'exemple en référence aux dessins annexés, dans lesquels :The aforementioned clutch may or may not include automatic means of catching up wear. The invention will be better understood and other characteristics, details and advantages thereof will appear more clearly on reading the description which follows, given by way of example with reference to the accompanying drawings, in which:
- la figure 1 représente schématiquement un système de commande selon l'invention ;- Figure 1 shows schematically a control system according to the invention;
- la figure 2 est un organigramme général des différentes opérations du procédé de commande selon l'invention.FIG. 2 is a general flowchart of the various operations of the control method according to the invention.
Le système de commande selon l'invention est destiné à équiper un véhicule automobile comprenant un moteur à combustion interne 10 d'un type classique, dont l'arbre de sortie 12 est relié par un embrayage E à un arbre d'entrée ou arbre primaire 14 d'une boîte de vitesses 16, telle par exemple qu'une boîte mécanique robotisée, dont l'arbre de sortie 18 entraîne des roues motrices 20 du véhicule par l'intermédiaire d'un différentiel 22. L'embrayage E est piloté par un actionneur 24, par exemple du type électrique ou fluidique, comprenant un élément mobile d'actionnement de
l'embrayage.The control system according to the invention is intended to equip a motor vehicle comprising an internal combustion engine 10 of a conventional type, the output shaft 12 is connected by a clutch E to an input shaft or primary shaft 14 of a gearbox 16, such as for example a robotized mechanical gearbox, whose output shaft 18 drives the drive wheels 20 of the vehicle via a differential 22. The clutch E is driven by an actuator 24, for example of the electrical or fluidic type, comprising a movable actuating element of the clutch.
Le véhicule est également équipé d'un dispositif 26 d'arrêt et de redémarrage automatiques du moteur ou dispositif « Stop and Go », comprenant essentiellement un alternateur-démarreur réversible commandé par un calculateur 28 comprenant de façon classique un ou des microprocesseurs, des mémoires, et des interfaces d'entrée-sortie, ce calculateur pouvant commander également, entre autres, l'actionneur 24 de l'embrayage E et la boîte de vitesses 16.The vehicle is also equipped with a device 26 for stopping and restarting the engine automatically or "Stop and Go" device, essentially comprising a reversible alternator-starter controlled by a computer 28 conventionally comprising one or more microprocessors, memories , and input-output interfaces, this computer can also control, inter alia, the actuator 24 of the clutch E and the gearbox 16.
Le dispositif d'arrêt et de redémarrage automatiques 26 est destiné à commander l'arrêt du moteur 10 du véhicule pour réduire la consommation de carburant quand certaines conditions sont réunies, notamment :The automatic stopping and restarting device 26 is for controlling the stopping of the vehicle engine 10 to reduce fuel consumption when certain conditions are met, including:
- la boîte de vitesses 16 est en position neutre (ou au point mort) ;- The gearbox 16 is in the neutral position (or in neutral);
- l'embrayage E est ouvert,the clutch E is open,
- l'arbre d'entrée 14 de la boîte de vitesses ne tourne pas ; - la vitesse de rotation de l'arbre 12 de sortie du moteur 10 est supérieure ou égale à une valeur minimale prédéterminée correspondant par exemple approximativement au régime de ralenti ;the input shaft 14 of the gearbox does not rotate; - The rotational speed of the output shaft 12 of the motor 10 is greater than or equal to a predetermined minimum value corresponding for example approximately to the idle speed;
- le véhicule est à l'arrêt (sa vitesse de déplacement est nulle) ou sa vitesse est très faible, par exemple inférieure à 2km/h. Ces conditions peuvent également comprendre un appui du conducteur sur la pédale de frein.the vehicle is at a standstill (its traveling speed is zero) or its speed is very low, for example less than 2 km / h. These conditions may also include driver support on the brake pedal.
Lorsque ces conditions sont réunies, un ordre d'arrêt du moteur 10 est donné par le calculateur 28 et provoque l'arrêt effectif du moteur 10 avec un temps de réponse qui est typiquement inférieur à une seconde. Cet intervalle de temps est suffisant pour la recherche du point de léchage précédemment déterminé et pour une nouvelle détermination du point de léchage, celle-ci consistant essentiellement :When these conditions are met, a stop command of the motor 10 is given by the computer 28 and causes the actual stopping of the motor 10 with a response time which is typically less than one second. This time interval is sufficient for the search of the licking point previously determined and for a new determination of the licking point, which essentially consists of:
- à commander une fermeture progressive de l'embrayage E,to order a progressive closing of the clutch E,
- à détecter le début de la rotation de l'arbre primaire 14 de la boîte de vitesses,to detect the beginning of the rotation of the primary shaft 14 of the gearbox,
- à enregistrer la position correspondante de l'élément mobile de
l'actionneur 24,to record the corresponding position of the movable element of the actuator 24,
- et à rouvrir l'embrayage.- and reopen the clutch.
Il suffit pour cela d'équiper l'élément mobile de l'actionneur 24 d'un capteur de position 30, et l'arbre primaire 14 de la boîte de vitesses d'un capteur 32 de position angulaire ou de vitesse de rotation.It suffices for this to equip the movable member of the actuator 24 with a position sensor 30, and the primary shaft 14 of the gearbox of a sensor 32 of angular position or rotational speed.
La détection du point de léchage de l'embrayage E se fait sans modifier les conditions d'arrêt du moteur 10 par le dispositif d'arrêt et de redémarrage automatiques du moteur. Si l'intervalle de temps entre l'ordre d'arrêt et l'arrêt effectif du moteur est trop court pour permettre une détermination du point de léchage de l'embrayage de la façon indiquée, et si la détermination est commencée, on interrompt cette détermination et on remet l'actionneur en position initiale, l'arrêt étant prioritaire sur la détermination en cours.The detection of the licking point of the clutch E is done without modifying the conditions for stopping the engine 10 by the device for stopping and restarting the engine automatically. If the time interval between the stop command and the actual stopping of the engine is too short to allow a determination of the clutch licking point as indicated, and if the determination is started, this is discontinued. determination and restoring the actuator to the initial position, the stop being given priority over the determination in progress.
En variante, on peut dans certains cas provoquer une temporisation de l'arrêt du moteur, par exemple d'environ une seconde, pour permettre l'achèvement de la détermination du point de léchage.Alternatively, in some cases it may be possible to delay the stopping of the motor, for example by about one second, to allow completion of the determination of the licking point.
Si, dans l'intervalle de temps entre l'ordre d'arrêt et l'arrêt du moteur, la vitesse de rotation de l'arbre primaire 14 de la boîte de vitesse ne revient pas assez vite à une valeur nulle, on peut par fermeture partielle de l'embrayage E, freiner l'arbre primaire 14 de la boîte de vitesse, puis faire la détection du point de léchage de l'embrayage E quand cette vitesse a suffisamment baissé.If, in the time interval between the stop command and the stopping of the engine, the speed of rotation of the primary shaft 14 of the gearbox does not return quickly enough to a zero value, one can by partially closing the clutch E, braking the primary shaft 14 of the gearbox, and then detecting the licking point of the clutch E when this speed has dropped sufficiently.
Les principales opérations du procédé de commande selon l'invention ont été représentées schématiquement en figure 2. Lorsque un ordre d'arrêt du moteur 10 est donné par le dispositif d'arrêt et de redémarrage automatiques précité comme indiqué en 34, on vérifie si un certain nombre de conditions sont réunies, comprenant notamment :The main operations of the control method according to the invention have been shown schematically in FIG. 2. When a stop command of the motor 10 is given by the above-mentioned automatic stop and restart device as indicated at 34, it is checked whether a certain conditions are met, including:
- la vérification 36 de l'état de la boîte de vitesses 16 en position neutre et de l'ouverture de l'embrayage E,the verification 36 of the state of the gearbox 16 in the neutral position and of the opening of the clutch E,
- la vérification 38 de la rotation nulle ou sensiblement nulle de
l'arbre primaire 14 de la boîte de vitesses,the verification 38 of the zero or substantially zero rotation of the primary shaft 14 of the gearbox,
- la vérification 40 d'une vitesse nulle ou très faible du véhicule (éventuellement de l'appui sur la pédale de frein),the verification 40 of a zero or very low speed of the vehicle (possibly of pressing on the brake pedal),
- la vérification 42 de la rotation de l'arbre de sortie 12 du moteur à une vitesse supérieure ou égale à une valeur minimale,checking 42 the rotation of the output shaft 12 of the motor at a speed greater than or equal to a minimum value,
- la recherche 44 du point de léchage précédemment déterminé. Ces conditions étant réunies, la détermination 46 du point de léchage de l'embrayage E comprend la commande de l'actionneur 24, la détection de la rotation de l'arbre primaire14 de la boîte de vitesses et l'enregistrement de la position de l'élément mobile de l'actionneur 24, puis la ré-ouverture de l'embrayage.the search 44 of the licking point previously determined. These conditions being satisfied, the determination 46 of the licking point of the clutch E comprises the control of the actuator 24, the detection of the rotation of the primary shaft 14 of the gearbox and the recording of the position of the movable element of the actuator 24, then the re-opening of the clutch.
L'opération suivante 48 est l'arrêt effectif du moteur 10 du véhicule, qui est suivie par le redémarrage 50 du moteur par le dispositif 26, quand le conducteur manifeste son intention de redémarrer le véhicule. On peut aussi déterminer le point de léchage dans d'autres conditions, par exemple au démarrage à froid du moteur, à l'arrêt du moteur par le conducteur, lors de tous les arrêts, ou de certains d'entre eux, par le dispositif « Stop and Go ».The next operation 48 is the actual stopping of the engine 10 of the vehicle, which is followed by the restarting of the engine 50 by the device 26, when the driver indicates his intention to restart the vehicle. It is also possible to determine the licking point in other conditions, for example when the engine is started cold, when the driver stops the engine, during all stops, or some of them, by the device. "Stop and Go".
Les arrêts où l'on fait cette détermination sont déterminés en fonction de certains paramètres, tels que le temps écoulé ou la distance parcourue depuis une détermination précédente, le nombre d'actionnements de l'embrayage, la température du moteur (une montée en température entraînant une variation du point de léchage en raison des dilatations thermiques). L'invention est applicable à un embrayage comportant ou non un système interne de rattrapage d'usure de la friction, l'invention permettant dans le premier cas de surveiller le bon fonctionnement du système de rattrapage d'usure, en donnant par exemple des informations par un système de diagnostic accessible à un réparateur.
The stops at which this determination is made are determined according to certain parameters, such as the time elapsed or the distance traveled since a previous determination, the number of actuations of the clutch, the engine temperature (a rise in temperature causing a variation of the licking point due to thermal expansion). The invention is applicable to a clutch comprising or not an internal friction wear compensating system, the invention allowing in the first case to monitor the proper operation of the wear-compensating system, for example by giving information by a diagnostic system accessible to a repairer.
Claims
1. Procédé de commande d'un véhicule automobile comprenant un embrayage (E) commandé par un actionneur (24) et un dispositif (26) d'arrêt et de redémarrage automatiques du moteur dans des conditions prédéterminées comprenant en particulier une position neutre de la boîte de vitesses, caractérisé en ce qu'il consiste à déterminer le point de léchage de l'embrayage (E) durant l'intervalle de temps qui précède l'arrêt du moteur (10) du véhicule quand cet arrêt est commandé par le dispositif (26) précité.A method of controlling a motor vehicle comprising a clutch (E) controlled by an actuator (24) and a device (26) for automatically stopping and restarting the engine under predetermined conditions including in particular a neutral position of the gearbox, characterized in that it consists in determining the point of licking of the clutch (E) during the time interval preceding the stopping of the engine (10) of the vehicle when this stop is controlled by the device (26) cited above.
2. Procédé selon la revendication 1 , caractérisé en ce qu'il consiste à déterminer le point de léchage de l'embrayage (E) à chaque arrêt du moteur (10) commandé par le dispositif (26) précité.2. Method according to claim 1, characterized in that it consists in determining the point of licking of the clutch (E) at each stop of the motor (10) controlled by the device (26) above.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'il consiste à déterminer le point de léchage pour certains des arrêts précités seulement, en fonction de l'évolution de paramètres tels que la distance parcourue ou le temps écoulé depuis une détermination précédente, le nombre d'actionnements de l'embrayage ou la température du moteur.3. Method according to claim 1 or 2, characterized in that it consists in determining the licking point for some of the above-mentioned stops only, depending on the evolution of parameters such as the distance traveled or the time elapsed since a determination. previous, the number of actuations of the clutch or the engine temperature.
4. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il consiste à détecter la position du point de léchage de l'embrayage (E) par détection de la rotation d'un arbre primaire (14) de la boîte de vitesses du véhicule.4. Method according to one of the preceding claims, characterized in that it consists in detecting the position of the licking point of the clutch (E) by detecting the rotation of a primary shaft (14) of the box. vehicle speeds.
5. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il consiste à détecter et enregistrer la position d'un élément mobile de l'actionneur (24) de l'embrayage (E), lorsque cette position correspond au point de léchage de l'embrayage.5. Method according to one of the preceding claims, characterized in that it consists in detecting and recording the position of a movable element of the actuator (24) of the clutch (E), when this position corresponds to the point licking the clutch.
6. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il consiste à détecter le point de léchage de l'embrayage (E) par fermeture progressive de cet embrayage depuis sa position ouverte, la vitesse de rotation du moteur (10) étant supérieure ou égale à une valeur minimale prédéterminée. 6. Method according to one of the preceding claims, characterized in that it consists in detecting the licking point of the clutch (E) by progressive closure of this clutch from its open position, the speed of rotation of the motor (10). ) being greater than or equal to a predetermined minimum value.
7. Procédé selon la revendication 6, caractérisé en ce qu'il consiste à ralentir la rotation de l'arbre primaire (14) de la boîte de vitesses par fermeture partielle de l'embrayage (E), à l'ouvrir ensuite et à détecter le point de léchage de l'embrayage par fermeture progressive de cet embrayage.7. Method according to claim 6, characterized in that it consists in slowing down the rotation of the primary shaft (14) of the gearbox by partial closing of the clutch (E), to open it later and to detect the licking point of the clutch by progressive closing of this clutch.
8. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il consiste également à rechercher la valeur précédemment enregistrée du point de léchage avant de procéder à une nouvelle détermination de ce point, dans l'intervalle de temps précité. 8. Method according to one of the preceding claims, characterized in that it also consists in searching for the previously recorded value of the licking point before making a new determination of this point, in the aforementioned time interval.
9. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il consiste, après détermination du point de léchage, à rouvrir l'embrayage (E) durant l'intervalle de temps précité précédant l'arrêt du moteur.9. Method according to one of the preceding claims, characterized in that it consists, after determining the licking point, to reopen the clutch (E) during the aforementioned time period preceding the engine stop.
10. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il consiste à inhiber la détermination du point de léchage de l'embrayage si l'intervalle de temps précité est trop court pour cette détermination ou à interrompre cette détermination si l'arrêt intervient avant la fin de cette détermination.10. Method according to one of the preceding claims, characterized in that it consists in inhibiting the determination of the point of licking of the clutch if the aforementioned time interval is too short for this determination or to interrupt this determination if stop occurs before the end of this determination.
11. Système de commande d'un véhicule automobile pour l'exécution du procédé décrit dans l'une des revendications précédentes, caractérisé en ce qu'il comprend des moyens (30, 28) de détection et d'enregistrement de la position d'un élément mobile d'un actionneur (24) agissant sur l'embrayage (E) du véhicule, des moyens (32) de détection de la rotation ou de la vitesse de rotation d'un arbre primaire (14) de la boîte de vitesses du véhicule, et des moyens (28) de traitement de l'information reliés aux moyens précités de détection et au dispositif précité (26) d'arrêt et de démarrage automatiques du moteur et programmé pour commander l'actionneur (24) dans le sens de la fermeture de l'embrayage et pour enregistrer la position de l'élément mobile de l'actionneur correspondant à une mise en rotation de l'arbre primaire (14) de la boîte de vitesses à partir d'une rotation sensiblement nulle de cet arbre, pendant l'intervalle de temps qui précède l'arrêt du moteur (10) commandé par le dispositif (26) précité.11. Control system of a motor vehicle for carrying out the method described in one of the preceding claims, characterized in that it comprises means (30, 28) for detecting and recording the position of a movable element of an actuator (24) acting on the clutch (E) of the vehicle, means (32) for detecting the rotation or the speed of rotation of a primary shaft (14) of the gearbox of the vehicle, and information processing means (28) connected to the aforementioned means of detection and the aforementioned device (26) for stopping and starting the engine automatically and programmed to control the actuator (24) in the direction closing the clutch and to record the position of the movable member of the actuator corresponding to a rotation of the gearbox primary shaft (14) from a substantially zero rotation of this tree, during the time interval which precedes the stopping of the motor (10) controlled by the above-mentioned device (26).
12. Système selon la revendication 11 , caractérisé en ce que l'embrayage (E) comprend des moyens de rattrapage d'usure. 12. System according to claim 11, characterized in that the clutch (E) comprises means of catching wear.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR0452760A FR2878303B1 (en) | 2004-11-25 | 2004-11-25 | METHOD AND SYSTEM FOR CONTROLLING A MOTOR VEHICLE WITH PILOT CLUTCH |
PCT/FR2005/050988 WO2006056723A1 (en) | 2004-11-25 | 2005-11-24 | Method and system for controlling a motor vehicle comprising an actuator-operated clutch |
Publications (1)
Publication Number | Publication Date |
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EP1819933A1 true EP1819933A1 (en) | 2007-08-22 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP05819329A Withdrawn EP1819933A1 (en) | 2004-11-25 | 2005-11-24 | Method and system for controlling a motor vehicle comprising an actuator-operated clutch |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1819933A1 (en) |
JP (1) | JP2008522108A (en) |
CN (1) | CN101065595A (en) |
FR (1) | FR2878303B1 (en) |
WO (1) | WO2006056723A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008042891A1 (en) * | 2008-10-16 | 2010-04-22 | Robert Bosch Gmbh | Method for automatic probe adaptation |
CN102562330B (en) * | 2010-12-28 | 2016-02-17 | 上海汽车集团股份有限公司 | Realize automatic engine stop and self-drive controlling method |
GB201401157D0 (en) * | 2014-02-12 | 2014-03-12 | Ford Global Tech Llc | A method of stopping and starting an engine |
DE102015213297A1 (en) * | 2015-07-15 | 2017-01-19 | Schaeffler Technologies AG & Co. KG | Method for controlling a clutch actuator, preferably for controlling an unactuated closed clutch |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2639021B2 (en) * | 1988-11-29 | 1997-08-06 | いすゞ自動車株式会社 | Control device for clutch |
JP2814010B2 (en) * | 1990-06-11 | 1998-10-22 | 株式会社ゼクセル | Correction method of clutch operation control data |
JP3550835B2 (en) * | 1995-10-17 | 2004-08-04 | いすゞ自動車株式会社 | Auto clutch control device |
DE19734038A1 (en) * | 1996-08-16 | 1998-02-19 | Luk Getriebe Systeme Gmbh | Motor vehicle drive method |
FR2812919B1 (en) * | 2000-08-11 | 2006-10-20 | Valeo | METHOD FOR CONTROLLING A CLUTCH IN A MOTOR VEHICLE |
US6494810B1 (en) * | 2001-05-30 | 2002-12-17 | Eaton Corporation | Clutch calibration and control |
JP4751537B2 (en) * | 2001-08-28 | 2011-08-17 | アイシン精機株式会社 | Clutch control device |
JP3712193B2 (en) * | 2001-12-10 | 2005-11-02 | 本田技研工業株式会社 | Engagement control method of friction engagement element in power transmission device |
JP4254303B2 (en) * | 2003-03-28 | 2009-04-15 | アイシン精機株式会社 | Friction clutch for vehicle |
-
2004
- 2004-11-25 FR FR0452760A patent/FR2878303B1/en active Active
-
2005
- 2005-11-24 EP EP05819329A patent/EP1819933A1/en not_active Withdrawn
- 2005-11-24 JP JP2007542071A patent/JP2008522108A/en active Pending
- 2005-11-24 WO PCT/FR2005/050988 patent/WO2006056723A1/en active Application Filing
- 2005-11-24 CN CNA2005800404358A patent/CN101065595A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2006056723A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2878303A1 (en) | 2006-05-26 |
WO2006056723A1 (en) | 2006-06-01 |
JP2008522108A (en) | 2008-06-26 |
CN101065595A (en) | 2007-10-31 |
FR2878303B1 (en) | 2007-01-12 |
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