WO2012035222A1 - Method for validating that a gearbox is in neutral in an automatic system for stopping and restarting a vehicle combustion engine - Google Patents

Method for validating that a gearbox is in neutral in an automatic system for stopping and restarting a vehicle combustion engine Download PDF

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Publication number
WO2012035222A1
WO2012035222A1 PCT/FR2011/051708 FR2011051708W WO2012035222A1 WO 2012035222 A1 WO2012035222 A1 WO 2012035222A1 FR 2011051708 W FR2011051708 W FR 2011051708W WO 2012035222 A1 WO2012035222 A1 WO 2012035222A1
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WO
WIPO (PCT)
Prior art keywords
neutral
gearbox
information
sensor
stopping
Prior art date
Application number
PCT/FR2011/051708
Other languages
French (fr)
Inventor
Arnaud Celisse
Original Assignee
Peugeot Citroën Automobiles SA
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Publication date
Application filed by Peugeot Citroën Automobiles SA filed Critical Peugeot Citroën Automobiles SA
Publication of WO2012035222A1 publication Critical patent/WO2012035222A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
    • F02N11/0822—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to action of the driver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • 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
    • 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, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
    • 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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/10—Change speed gearings
    • B60W2510/1005—Transmission ratio engaged
    • B60W2510/101—Transmission neutral state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/14—Clutch pedal position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/08—Parameters used for control of starting apparatus said parameters being related to the vehicle or its components
    • F02N2200/0802—Transmission state, e.g. gear ratio or neutral state
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/10—Parameters used for control of starting apparatus said parameters being related to driver demands or status
    • F02N2200/103—Clutch pedal position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to a method for controlling the operation of a system for stopping and automatically restarting the engine of a vehicle.
  • a sensor generally Hall effect, to detect the position of the shift lever and in particular the neutral position corresponding to the fact that a speed is not engaged.
  • this type of sensor is relatively robust, a malfunction can occur and the automatic system can restart the engine believing that the gearbox is in the neutral position. The vehicle can then inadvertently move forward or backward and cause a collision. It is therefore very important to ensure that the conditions required for restarting the heat engine are actually met.
  • patent application FR 2 934 881 describes a method for verifying the operation of the gearbox neutral detector. Although very useful, this method is not used before each restart of the engine but rather at the output of the assembly line of the system.
  • UK patent application 2466479 A describes a method of controlling an automatic system in which the information provided by the sensor is verified using two different positions of the speed selector.
  • Patent application WO 2010/031618 A1 describes a method for controlling the operation of a neutral position sensor by verifying certain information such as the vehicle speed, the engine speed and the position of the clutch.
  • the present invention provides a method of controlling the operation of an automatic system that improves the overall reliability of the automatic system and is relatively simple to implement compared to the solutions proposed by the prior art.
  • the invention relates to a method for controlling the operation of a stop and automatic restart system.
  • the engine of a motor vehicle equipped with a manual gearbox according to which the stopping of the engine is controlled if predetermined conditions are met and in particular if a sensor delivers information that the gearbox is in neutral .
  • the method before authorizing the stopping of the engine, it is verified that the information delivered by the sensor that the gearbox is in neutral is consistent in determining whether a disengagement was detected before moving into neutral .
  • said sensor when said sensor delivers an information according to which the gearbox is in neutral, it is determined whether a disengagement has taken place in a predetermined time interval preceding the delivery of said information of the sensor and, if this is the case, said information is validated and, if it is not the case, said information is invalidated.
  • Said predetermined time interval is preferably less than four seconds and advantageously about two seconds.
  • the present invention proposes to verify that the information point dead delivered by a neutral point sensor is reliable.
  • the usual strategies for stopping and automatically restarting the engine require that the gearbox be in neutral and the clutch pedal released when the engine is stopped.
  • Neutral information is also used to allow automatic restart. For safety reasons, it is important to ensure that a gearbox report is not engaged.
  • the neutral point sensor for example a Hall effect sensor as described and shown in the patent application FR 2 934 881, can indeed deliver erroneous information, for example if it is down. It must therefore be ensured when the automatic system goes into engine shutdown mode, that the neutral information is consistent with other information.
  • the neutral information is validated to enter the engine stop mode if a disengagement has been detected before going into neutral.
  • a first mode of implementation of the method it is verified that the clutch pedal has been depressed beyond a predetermined position ("Clutch pedal pressed beyond a threshold” ). This verification can be done easily using a position sensor. If the pedal has not been depressed beyond the threshold, we do not validate (No) the neutral information (reference 13: “Info PM not validated to true”). The system for stopping and restarting the engine automatically is not allowed to operate. On the other hand, if the clutch pedal has been depressed beyond the predetermined threshold ("Yes"), the neutral information is validated to true (reference 14: "Info PM validated to true”) and the automatic system is authorized to operate.
  • the sequence of events is as follows: box report engaged; disengaging and determining the degree of depression of the clutch pedal; PM position of the gearbox and release of the clutch pedal.
  • a disengagement has taken place during a predetermined time interval, said interval starting with the emission of the neutral point signal by the sensor of Neutral ("Tempo, since pedal depression clutch not elapsed”).
  • Said time interval may be chosen less than four seconds and preferably about two seconds. If a disengagement occurred during said time interval ("yes"), the PM information is validated (reference 14); otherwise (“No"), it is not validated (reference 13). The validation of the PM information makes it possible to authorize the operation of the automatic system.
  • the sequence of events, for this second mode of operation, can be summarized as follows: disengaging to release a gear ratio and thus move to neutral; the neutral point sensor indicates "false PM” or "true PM”information; measuring the time elapsed between the indication of the sensor and the disengagement; comparing this measured time with a predetermined time interval; if this measured time is less than the predetermined time interval, the PM information is validated and is invalidated otherwise. ⁇
  • the dead point information delivered by the sensor may be erroneous because it is in a transient state and the sensor can then be in a zone of instability.
  • the present invention makes it possible to achieve rapid coherence of the neutral information (without necessarily declaring the system at fault) when it is needed (that is to say just before switching to stopping the engine).
  • the implementation of the invention requires no additional sensor compared to those usually equipped vehicles with a system for stopping and automatic restart of the engine.

Abstract

The invention relates to a method for controlling the operation of an automatic stop-restart system for the combustion engine of a motor vehicle equipped with a manual gearbox, whereby the stopping of the engine is commanded if a combination of predetermined conditions is met and notably if a sensor is delivering information that the gearbox is in neutral. According to the invention, before authorizing the stopping of the engine, a check is carried out to ensure that the information delivered by said sensor that the gearbox is in neutral is consistent by determining whether declutching has been detected prior to the change into neutral.

Description

PROCEDE DE VALIDATION DE LA POSITION POINT MORT DE BOITE DE VITESSES DANS UN SYSTEME D'ARRET ET DE REDEMARRAGE AUTOMATIQUE DU MOTEUR THERMIQUE D'UN VEHICULE  METHOD FOR VALIDATION OF THE NEUTRAL POSITION OF A GEARBOX IN A SYSTEM FOR AUTOMATICALLY STOPPING AND RESTARTING THE THERMAL MOTOR OF A VEHICLE
[oooi] La présente invention revendique la priorité de la demande française 1057302 déposée le 14 septembre 2010 dont le contenu (texte, dessins et revendications) est ici incorporé par référence. [Oooi] The present invention claims the priority of the French application 1057302 filed September 14, 2010 whose content (text, drawings and claims) is here incorporated by reference.
[ooo2] La présente invention concerne un procédé de contrôle du fonctionnement d'un système d'arrêt et de redémarrage automatique du moteur thermique d'un véhicule. The present invention relates to a method for controlling the operation of a system for stopping and automatically restarting the engine of a vehicle.
[ooo3] Pour des raisons d'économie d'énergie et de satisfaction aux normes antipollution de plus en plus exigeantes, les véhicules automobiles munis d'un moteur thermique sont de plus en plus souvent équipés d'un système d'arrêt et de redémarrage automatique du moteur, ci-après désigné "système automatique", par exemple le système commercialisé sous l'appellation Stop & Start ou plus simplement S&S. Ces systèmes commandent l'arrêt du moteur lorsque le véhicule s'arrête (par exemple à un feu de signalisation rouge) et le redémarrage du moteur lorsque le conducteur manifeste son intention de redémarrer. La commande d'arrêt du moteur n'est activée que si certaines conditions sont réunies et, notamment pour les véhicules munis d'une boite de vitesses mécanique, si la boite de vitesses est en position neutre (au point mort) et si la pédale d'embrayage est relâchée. Un capteur, généralement à effet Hall, permet de détecter la position du levier de changement de vitesse et notamment la position neutre correspondant au fait qu'une vitesse n'est pas engagée. Bien que ce type de capteur soit relativement robuste, un mauvais fonctionnement peut se produire et le système automatique peut remettre en marche le moteur croyant que la boite de vitesses est en position neutre. Le véhicule peut alors malencontreusement avancer ou reculer et provoquer une collision. Il est donc très important de s'assurer que les conditions requises pour la remise en marche du moteur thermique sont effectivement réunies. [ooo3] For the sake of saving energy and satisfying more and more demanding anti-pollution standards, motor vehicles equipped with a combustion engine are increasingly equipped with a system for stopping and restarting automatic engine, hereinafter referred to as "automatic system", for example the system marketed under the name Stop & Start or more simply S & S. These systems control the stopping of the engine when the vehicle stops (for example at a red traffic light) and restarting the engine when the driver indicates his intention to restart. The engine stop command is only activated if certain conditions are met and, in particular for vehicles equipped with a mechanical gearbox, if the gearbox is in neutral position (in neutral) and if the pedal clutch is released. A sensor, generally Hall effect, to detect the position of the shift lever and in particular the neutral position corresponding to the fact that a speed is not engaged. Although this type of sensor is relatively robust, a malfunction can occur and the automatic system can restart the engine believing that the gearbox is in the neutral position. The vehicle can then inadvertently move forward or backward and cause a collision. It is therefore very important to ensure that the conditions required for restarting the heat engine are actually met.
[ooo4] Des solutions ont déjà été proposées pour améliorer la fiabilité du système. Ainsi, la demande de brevet FR 2 934 881 décrit un procédé de vérification du fonctionnement du détecteur de point mort de la boite de vitesses. Bien que très utile, ce procédé n'est pas utilisé avant chaque remise en marche du moteur mais plutôt en sortie de ligne de montage du système. [ooo4] Solutions have already been proposed to improve the reliability of the system. Thus, patent application FR 2 934 881 describes a method for verifying the operation of the gearbox neutral detector. Although very useful, this method is not used before each restart of the engine but rather at the output of the assembly line of the system.
[ooo5] La demande de brevet UK 2466479 A décrit une méthode de contrôle d'un système automatique selon laquelle l'information fournit par le capteur est vérifiée à l'aide de deux positions différentes du sélecteur de vitesse. [Ooo5] UK patent application 2466479 A describes a method of controlling an automatic system in which the information provided by the sensor is verified using two different positions of the speed selector.
[ooo6] La demande de brevet WO 2010/031618 A1 décrit une méthode permettant de contrôler le fonctionnement d'un capteur de point mort en vérifiant certaines informations telles que la vitesse du véhicule, le régime moteur et la position de l'embrayage. [0oo6] Patent application WO 2010/031618 A1 describes a method for controlling the operation of a neutral position sensor by verifying certain information such as the vehicle speed, the engine speed and the position of the clutch.
[ooo7] Les diagnostiques fonctionnels du capteur de point mort proposés par l'art antérieur ont un taux de couverture incomplet puisqu'ils ne peuvent être réalisés que pendant certaines phases de vie du véhicule (par exemple, véhicule roulant, rapport de boite engagé pour le diagnostique de point mort vrai erroné). De plus, des filtrages importants sont nécessaires de manière à ne pas déclarer le système en défaut de manière intempestive. [ooo7] The functional diagnostics of the neutral position sensor proposed by the prior art have an incomplete coverage rate since they can only be achieved during certain phases of vehicle life (for example, a rolling vehicle, gear ratio engaged for the diagnosis of true neutral point wrong). In addition, important filtering is necessary so as not to declare the faulty system inadvertently.
[ooo8] La présente invention propose un procédé de contrôle du fonctionnement d'un système automatique qui améliore la fiabilité globale du système automatique et qui est relativement simple à mettre en œuvre par rapport aux solutions proposées par l'art antérieur. [Ooo8] The present invention provides a method of controlling the operation of an automatic system that improves the overall reliability of the automatic system and is relatively simple to implement compared to the solutions proposed by the prior art.
[ooo9] De façon plus précise, l'invention concerne un procédé de contrôle du fonctionnement d'un système d'arrêt et de remise en marche automatique du moteur thermique d'un véhicule automobile muni d'une boite de vitesses manuelle, selon lequel l'arrêt du moteur est commandé si des conditions prédéterminées sont réunies et notamment si un capteur délivre une information selon laquelle la boite de vitesse est au point mort. Selon le procédé, avant d'autoriser l'arrêt du moteur, on vérifie que l'information délivrée par le capteur selon laquelle la boite de vitesses est au point mort est cohérente en déterminant si un débrayage a été détecté avant de passer au point mort. [Ooo9] More specifically, the invention relates to a method for controlling the operation of a stop and automatic restart system. the engine of a motor vehicle equipped with a manual gearbox, according to which the stopping of the engine is controlled if predetermined conditions are met and in particular if a sensor delivers information that the gearbox is in neutral . According to the method, before authorizing the stopping of the engine, it is verified that the information delivered by the sensor that the gearbox is in neutral is consistent in determining whether a disengagement was detected before moving into neutral .
[ooi o] Selon un mode de mise en œuvre, lorsqu'un rapport de boite de vitesses est engagé et lorsque le conducteur actionne la pédale d'embrayage pour passer au point mort, on vérifie que la pédale d'embrayage est enfoncée au-delà d'un seuil d'enfoncement prédéterminé et, si c'est le cas, l'information du capteur selon laquelle la boite de vitesses est au point mort est validée et, si ce n'est pas le cas, ladite information est invalidée. [001 1 ] [ooi o] According to an implementation mode, when a gearbox ratio is engaged and when the driver actuates the clutch pedal to go into neutral, it is verified that the clutch pedal is depressed at- beyond a predetermined threshold of penetration and, if it is the case, the information of the sensor according to which the gearbox is in neutral is validated and, if it is not the case, said information is invalidated . [001 1]
[0012] Selon un autre mode de mise en œuvre, lorsque ledit capteur délivre une information selon laquelle la boite de vitesse est au point mort, on détermine si un débrayage a eu lieu dans un intervalle de temps prédéterminé précédent la délivrance de ladite information du capteur et, si c'est le cas, ladite information est validée et, si ce n'est pas le cas, ladite information est invalidée.  According to another embodiment, when said sensor delivers an information according to which the gearbox is in neutral, it is determined whether a disengagement has taken place in a predetermined time interval preceding the delivery of said information of the sensor and, if this is the case, said information is validated and, if it is not the case, said information is invalidated.
[0013] Ledit intervalle de temps prédéterminé est de préférence inférieur à quatre secondes et avantageusement d'environ deux secondes. Said predetermined time interval is preferably less than four seconds and advantageously about two seconds.
[ooi 4] Certaines desdites conditions prédéterminées dépendent du conducteur: elles peuvent correspondre aux faits que le conducteur a positionné la boite de vitesses au point mort et qu'il n'appuie pas sur la pédale d'embrayage, laquelle est alors relâchée. [0015] D'autres avantages et caractéristiques de l'invention apparaîtront au cours de la description qui suit de plusieurs modes de mises en œuvre de l'invention, donnés à titre d'exemples non limitatifs, en référence au dessin annexé et sur lequel la figure 1 illustre un logigramme du procédé. [0016] Le dessin annexé pourra non seulement servir à compléter l'invention, mais aussi contribuer à sa définition, le cas échéant. [ooi 4] Some of said predetermined conditions depend on the driver: they may correspond to the facts that the driver has positioned the gearbox in neutral and that he does not press the clutch pedal, which is then released. Other advantages and features of the invention will become apparent from the following description of several embodiments of the invention, given by way of non-limiting examples, with reference to the accompanying drawing and in which: Figure 1 illustrates a process flow diagram. The appended drawing may not only serve to complete the invention, but also contribute to its definition, if necessary.
[0017] Afin de supprimer ou de diminuer le risque de redémarrage automatique du moteur thermique à l'aide d'un système automatique d'un véhicule muni d'une boite de vitesse manuelle, la présente invention propose de vérifier que l'information point mort délivré par un capteur de point mort est fiable. Les stratégies habituelles d'arrêt et de redémarrage automatique du moteur thermique imposent pour l'arrêt du moteur que la boite de vitesses soit au point mort et que la pédale d'embrayage soit relâchée. L'information point mort est également utilisée pour autoriser le redémarrage automatique. Pour des raisons de sécurité, il est primordial de s'assurer qu'un rapport de boite de vitesses n'est pas engagé. Le capteur de point mort, par exemple un capteur à effet Hall tel que décrit et représenté dans la demande de brevet FR 2 934 881 , peut en effet délivrer une information erronée, par exemple s'il est en panne. Il faut donc s'assurer lorsque le système automatique passe en mode d'arrêt du moteur, que l'information de point mort est cohérente avec d'autres informations. Selon la présente invention, l'information point mort est validée pour passer en mode d'arrêt du moteur que si un débrayage a été détecté avant de passer au point mort. In order to eliminate or reduce the risk of automatic restart of the engine with the aid of an automatic system of a vehicle equipped with a manual gearbox, the present invention proposes to verify that the information point dead delivered by a neutral point sensor is reliable. The usual strategies for stopping and automatically restarting the engine require that the gearbox be in neutral and the clutch pedal released when the engine is stopped. Neutral information is also used to allow automatic restart. For safety reasons, it is important to ensure that a gearbox report is not engaged. The neutral point sensor, for example a Hall effect sensor as described and shown in the patent application FR 2 934 881, can indeed deliver erroneous information, for example if it is down. It must therefore be ensured when the automatic system goes into engine shutdown mode, that the neutral information is consistent with other information. According to the present invention, the neutral information is validated to enter the engine stop mode if a disengagement has been detected before going into neutral.
[0018] Sur la figure 1 , qui montre un logigramme du procédé de l'invention, le capteur de point mort a délivré un signal indiquant que la boite de vitesses est au point mort PM ("info PM à vrai") (référence 1 1 ). In Figure 1, which shows a logic diagram of the method of the invention, the neutral position sensor has issued a signal indicating that the gearbox is in the dead center PM ("info PM to true") (reference 1 1).
[0019] Selon un premier mode de mise en œuvre du procédé (référence 12), on vérifie que la pédale d'embrayage a été enfoncée au-delà d'une position prédéterminée ("Pédale embrayage enfoncée au-delà d'un seuil"). Cette vérification peut être faite aisément à l'aide d'un capteur de position. Si la pédale n'a pas été enfoncée au-delà du seuil, on ne valide pas (Non) l'information de point mort (référence 13: "Info PM non validée à vrai"). Le système d'arrêt et de redémarrage automatique du moteur n'est alors pas autorisé à fonctionner. Par contre, si la pédale d'embrayage a été enfoncée au-delà du seuil prédéterminé ("Oui"), l'information point mort est validée à vrai (référence 14: "Info PM validée à vrai") et le système automatique est autorisé à fonctionner. La séquence des événements est la suivante: rapport de boite engagé; débrayage et détermination du degré d'enfoncement de la pédale d'embrayage; position PM de la boite de vitesses et relâchement de la pédale d'embrayage. According to a first mode of implementation of the method (reference 12), it is verified that the clutch pedal has been depressed beyond a predetermined position ("Clutch pedal pressed beyond a threshold" ). This verification can be done easily using a position sensor. If the pedal has not been depressed beyond the threshold, we do not validate (No) the neutral information (reference 13: "Info PM not validated to true"). The system for stopping and restarting the engine automatically is not allowed to operate. On the other hand, if the clutch pedal has been depressed beyond the predetermined threshold ("Yes"), the neutral information is validated to true (reference 14: "Info PM validated to true") and the automatic system is authorized to operate. The sequence of events is as follows: box report engaged; disengaging and determining the degree of depression of the clutch pedal; PM position of the gearbox and release of the clutch pedal.
[0020] Selon un deuxième mode de mise en œuvre (référence 15), on s'assure qu'un débrayage a eu lieu pendant un intervalle de temps prédéterminé, ledit intervalle commençant avec l'émission du signal de point mort par le capteur de point mort ("Tempo, depuis enfoncement pédale embrayage non écoulée"). Ledit intervalle de temps peut être choisi inférieur à quatre secondes et préférentiellement d'environ deux secondes. Si un débrayage a bien eu lieu pendant ledit intervalle de temps ("oui"), l'information PM est validée (référence 14); dans le cas contraire ("Non"), elle n'est pas validée (référence 13). La validation de l'information PM permet d'autoriser le fonctionnement du système automatique. La séquence des événements, pour ce deuxième mode de fonctionnement, peut être résumée de la façon suivante: débrayage pour dégager un rapport de boite et donc passer au point mort; le capteur de point mort indique une information "PM faux" ou "PM vrai"; mesure du temps écoulé entre l'indication du capteur et le débrayage; comparaison de ce temps mesuré avec un intervalle de temps prédéterminé; si ce temps mesuré est inférieur à l'intervalle de temps prédéterminé, l'information PM est validée et elle est invalidée dans le cas contraire. ό According to a second implementation mode (reference 15), it is ensured that a disengagement has taken place during a predetermined time interval, said interval starting with the emission of the neutral point signal by the sensor of Neutral ("Tempo, since pedal depression clutch not elapsed"). Said time interval may be chosen less than four seconds and preferably about two seconds. If a disengagement occurred during said time interval ("yes"), the PM information is validated (reference 14); otherwise ("No"), it is not validated (reference 13). The validation of the PM information makes it possible to authorize the operation of the automatic system. The sequence of events, for this second mode of operation, can be summarized as follows: disengaging to release a gear ratio and thus move to neutral; the neutral point sensor indicates "false PM" or "true PM"information; measuring the time elapsed between the indication of the sensor and the disengagement; comparing this measured time with a predetermined time interval; if this measured time is less than the predetermined time interval, the PM information is validated and is invalidated otherwise. ό
[0021 ] On remarquera que l'information de point mort délivrée par le capteur peut être erronée parce que l'on se trouve dans un état transitoire et le capteur peut être alors dans une zone d'instabilité. It will be noted that the dead point information delivered by the sensor may be erroneous because it is in a transient state and the sensor can then be in a zone of instability.
[0022] La présente invention permet de réaliser une cohérence rapide de l'information point mort (sans forcément déclarer le système en défaut) au moment où on en a besoin (c'est-à-dire juste avant de passer en mode d'arrêt du moteur). La mise en œuvre de l'invention ne nécessite aucun capteur supplémentaire par rapport à ceux qui équipe habituellement les véhicules munis d'un système d'arrêt et de redémarrage automatique du moteur. The present invention makes it possible to achieve rapid coherence of the neutral information (without necessarily declaring the system at fault) when it is needed (that is to say just before switching to stopping the engine). The implementation of the invention requires no additional sensor compared to those usually equipped vehicles with a system for stopping and automatic restart of the engine.
[0023] D'autres modes de mise en œuvre que ceux décrits et représentés peuvent être conçus par l'homme du métier sans sortir du cadre de la présente invention. Other modes of implementation than those described and shown may be designed by those skilled in the art without departing from the scope of the present invention.

Claims

REVENDICATIONS
1. Procédé de contrôle du fonctionnement d'un système d'arrêt et de remise en marche automatique du moteur thermique d'un véhicule automobile muni d'une boite de vitesses manuelle, selon lequel l'arrêt du moteur est commandé si des conditions prédéterminées sont réunies et notamment si un capteur délivre une information selon laquelle la boite de vitesse est au point mort, le procédé étant caractérisé en ce que, avant d'autoriser l'arrêt du moteur, on vérifie que l'information délivrée par ledit capteur selon laquelle la boite de vitesses est au point mort est cohérente en déterminant si un débrayage a été détecté avant de passer au point mort. 1. A method for controlling the operation of a system for stopping and automatic restarting of the engine of a motor vehicle equipped with a manual gearbox, according to which the stopping of the engine is controlled if predetermined conditions are met and in particular if a sensor delivers an information according to which the gearbox is in neutral, the method being characterized in that, before authorizing the stopping of the engine, it is verified that the information delivered by said sensor according to which the gearbox is in neutral is consistent in determining whether a disengagement was detected before moving into neutral.
2. Procédé selon la revendication 1 caractérisé en ce que, lorsqu'un rapport de boite de vitesses est engagé et lorsque le conducteur actionne la pédale d'embrayage pour passer au point mort, on vérifie que la pédale d'embrayage est enfoncée au-delà d'un seuil d'enfoncement prédéterminé et, si c'est le cas, l'information du capteur selon laquelle la boite de vitesses est au point mort est validée. 2. Method according to claim 1 characterized in that, when a gearbox ratio is engaged and when the driver actuates the clutch pedal to go into neutral, it is verified that the clutch pedal is depressed at- beyond a predetermined threshold of penetration and, if it is the case, the information of the sensor according to which the gearbox is in neutral is validated.
3. Procédé selon la revendication 1 caractérisé en ce que, lorsque ledit capteur délivre une information selon laquelle la boite de vitesse est au point mort, on détermine si un débrayage a eu lieu dans un intervalle de temps prédéterminé précédent la délivrance de ladite information du capteur et, si c'est le cas, ladite information est validée et, si ce n'est pas le cas, ladite information est invalidée.  3. Method according to claim 1 characterized in that, when said sensor delivers an information according to which the gearbox is in neutral, it is determined whether a disengagement has taken place in a predetermined time interval preceding the delivery of said information of the sensor and, if this is the case, said information is validated and, if it is not the case, said information is invalidated.
4. Procédé selon la revendication 3 caractérisé en ce que ledit intervalle de temps prédéterminé est inférieur à quatre secondes.  4. Method according to claim 3 characterized in that said predetermined time interval is less than four seconds.
5. Procédé selon la revendication 4 caractérisé en ce que ledit intervalle de temps prédéterminé est d'environ deux secondes. 5. Method according to claim 4 characterized in that said predetermined time interval is about two seconds.
6. Procédé selon l'une des revendications précédentes caractérisé en ce que lesdites conditions prédéterminées qui dépendent du conducteur sont: la boite de vitesses est au point mort et la pédale d'embrayage est relâchée. 6. Method according to one of the preceding claims characterized in that said predetermined conditions which depend on the driver are: the gearbox is in neutral and the clutch pedal is released.
PCT/FR2011/051708 2010-09-14 2011-07-18 Method for validating that a gearbox is in neutral in an automatic system for stopping and restarting a vehicle combustion engine WO2012035222A1 (en)

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FR1057302A FR2964634B1 (en) 2010-09-14 2010-09-14 METHOD FOR VALIDATION OF THE NEUTRAL POSITION OF A GEARBOX IN A SYSTEM FOR AUTOMATICALLY STOPPING AND RESTARTING THE THERMAL MOTOR OF A VEHICLE
FR1057302 2010-09-14

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FR1057302A (en) 1952-05-23 1954-03-08 Gallia Sa Device forming a bag for undiluted waves
DE10251765A1 (en) * 2002-11-07 2004-05-27 Daimlerchrysler Ag Manual-drive motor vehicle automatic switching on and off method, using sensors to detect both neutral and clutch pedal position so that the engine can be turned off when stationary with the clutch fully depressed
DE102004024212A1 (en) * 2004-05-10 2005-12-08 Volkswagen Ag Automatic combustion engine start/stop control for hybrid vehicle involves enabling stop condition when clutch is engaged or brake pedal is activated
DE102005055450A1 (en) * 2004-11-22 2006-05-24 Toyota Jidosha K.K., Toyota Engine control device for motor vehicle has automatic switch-off control device continuously fulfilling preset condition for duration of waiting time
DE102006028338A1 (en) * 2005-06-20 2006-12-21 Ford Global Technologies, LLC, Dearborn Method for parking and starting an engine
FR2934881A1 (en) 2008-08-06 2010-02-12 Peugeot Citroen Automobiles Sa METHOD FOR VERIFYING THE OPERATION OF A DETECTOR DETECTOR OF A GEARBOX OF A MOTOR VEHICLE
WO2010031618A1 (en) 2008-09-22 2010-03-25 Robert Bosch Gmbh Method, arrangement, computer program and computer program product for diagnosing a functional capability of a neutral gear sensor
GB2466479A (en) 2008-12-09 2010-06-30 Ford Global Tech Llc A method of inhibiting stop-start control using gear selector position

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1057302A (en) 1952-05-23 1954-03-08 Gallia Sa Device forming a bag for undiluted waves
DE10251765A1 (en) * 2002-11-07 2004-05-27 Daimlerchrysler Ag Manual-drive motor vehicle automatic switching on and off method, using sensors to detect both neutral and clutch pedal position so that the engine can be turned off when stationary with the clutch fully depressed
DE102004024212A1 (en) * 2004-05-10 2005-12-08 Volkswagen Ag Automatic combustion engine start/stop control for hybrid vehicle involves enabling stop condition when clutch is engaged or brake pedal is activated
DE102005055450A1 (en) * 2004-11-22 2006-05-24 Toyota Jidosha K.K., Toyota Engine control device for motor vehicle has automatic switch-off control device continuously fulfilling preset condition for duration of waiting time
DE102006028338A1 (en) * 2005-06-20 2006-12-21 Ford Global Technologies, LLC, Dearborn Method for parking and starting an engine
FR2934881A1 (en) 2008-08-06 2010-02-12 Peugeot Citroen Automobiles Sa METHOD FOR VERIFYING THE OPERATION OF A DETECTOR DETECTOR OF A GEARBOX OF A MOTOR VEHICLE
WO2010031618A1 (en) 2008-09-22 2010-03-25 Robert Bosch Gmbh Method, arrangement, computer program and computer program product for diagnosing a functional capability of a neutral gear sensor
GB2466479A (en) 2008-12-09 2010-06-30 Ford Global Tech Llc A method of inhibiting stop-start control using gear selector position

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FR2964634B1 (en) 2012-09-28

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