WO2007045784A1 - Device for maintaining a motor vehicle in place on a slope, method for operating such a device and motor vehicle equipped with same - Google Patents

Device for maintaining a motor vehicle in place on a slope, method for operating such a device and motor vehicle equipped with same Download PDF

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Publication number
WO2007045784A1
WO2007045784A1 PCT/FR2006/051001 FR2006051001W WO2007045784A1 WO 2007045784 A1 WO2007045784 A1 WO 2007045784A1 FR 2006051001 W FR2006051001 W FR 2006051001W WO 2007045784 A1 WO2007045784 A1 WO 2007045784A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
speed
motor vehicle
torque
controlled
Prior art date
Application number
PCT/FR2006/051001
Other languages
French (fr)
Inventor
Patrick Valaix
Original Assignee
Peugeot Citroen Automobile Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peugeot Citroen Automobile Sa filed Critical Peugeot Citroen Automobile Sa
Publication of WO2007045784A1 publication Critical patent/WO2007045784A1/en

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Classifications

    • 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
    • B60W30/18109—Braking
    • B60W30/18118—Hill holding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B60W10/11—Stepped gearings

Definitions

  • the invention relates to a device for maintaining a motor vehicle in place in a slope, a method of operating such a device for holding a motor vehicle in place in a slope, and a motor vehicle comprising such a device.
  • the vehicle may move forward or backward, depending on the direction of the slope, between the moment when the driver has removed his foot of the brake and the moment when he puts his foot on the accelerator pedal and the traction chain responds to the required instruction.
  • the vehicle can make a displacement which can reach distances of the order of 50 cm and which is perceived negatively by the driver because this movement is not controlled by the driver nor as regards the speed of movement or in relation to the travel distance.
  • This phenomenon is more particularly noticeable with motor vehicles equipped with a controlled or robotized gearbox or equipped with a controlled torque transmission means that is usually found in automatic gearboxes, since the driver more clutch pedal as action lever and since it no longer uses, or rarely, the handbrake relying on the benefits associated with its gearbox.
  • US-A-20050075775 proposes a device acting on the idling speed of the internal combustion engine and the hydraulic fluid pressure of the torque converter.
  • this device makes it possible to vary the drag torque when a forward gear is engaged and thereby maintain the immobilized vehicle.
  • the document US-A-2004 0266 585 proposes a device comprising at least two clutches, a main clutch and at least one auxiliary clutch intended to serve to maintain the vehicle. sloping during gear changes. These two or more clutches cooperate to provide both torque and parking brake during shifting.
  • the object of the invention is to propose a solution which at least makes it possible to avoid the recoil of a vehicle in the upward direction with a gear ratio (forward gear) engaged and to prevent the advance of a vehicle into the vehicle. downward direction with a gear ratio (reverse gear) engaged and which has the advantage of a simple structure achievable at a low cost.
  • the object of the invention is achieved with a device for maintaining a motor vehicle in place in a slope, the motor vehicle comprising an internal combustion engine, a gearbox and a controlled torque transmission means.
  • the device comprises means for generating a signal corresponding to a speed of movement of the motor vehicle, engine control means for regulating the speed and / or torque thereof, control means of the controlled torque transmission means, control means of the motor assembly and controlled torque transmission means, shaped to grant the vehicle a speed of compensation with respect to the speed of movement, and means for activating the control means of the motor assembly and torque transmission controlled means.
  • the idea underlying the invention is to use information on the vehicle, which is either already available on the vehicle because of the presence of other control systems, or is easily made available with simple means, especially with speed sensors.
  • the solution of the invention makes it possible to maintain a vehicle in a slope during the parking maneuvers or the start of this parking, by acting solely on the wheel / engine coupling member. In other words, the solution of the invention does not use braking means or additional clutches or auxiliary.
  • the device of the invention is intended in the first line for vehicles equipped with a controlled mechanical gearbox.
  • the device of the invention can also be applied to an automatic gearbox, the latter already benefiting from part of the control of the controlled torque transmission means.
  • the device of the invention may also have one or the other of the following characteristics considered in isolation or in any technically possible combination:
  • the means for generating a signal corresponding to a moving speed of the motor vehicle are shaped to generate tops corresponding to a rotation of at least one wheel of the vehicle;
  • the means intended to generate a signal corresponding to a speed of movement of the motor vehicle are shaped to generate tops corresponding to a rotation of all the wheels of the vehicle; the means for generating a signal corresponding to a speed of movement of the motor vehicle are supplemented by a sensor of the steering wheel angle.
  • the means for generating a signal corresponding to a speed of movement of the motor vehicle are formed by sensors of an anti-lock system of the wheels; the device comprises a control system of a controlled gearbox and a clutch, the system making it possible to control the torque transmitted by the clutch, to take into account requests from a driver of the vehicle and to control the ratio transmission of the gearbox from the gears thereof.
  • the object of the invention is also achieved with a method of operating a device described above.
  • a method of operating a device described above comprises steps of verifying an initial stoppage of the motor vehicle, checking the engagement of a gearbox front or rear gear ratio, checking the presence of a gearing speed. moving the vehicle after the initial stopping, and issuing control signals to the control means of the motor assembly and the controlled torque transmission means, to grant the vehicle a speed of compensation with respect to the traveling speed .
  • Such an operating method may comprise, in addition, at least one or other of the following steps:
  • the verification of the initial stopping of the vehicle is implemented by checking the simultaneous presence of a support on the brake pedal of the vehicle and a speed of zero movement of the vehicle;
  • the object of the invention is finally achieved with a motor vehicle comprising a device for holding the motor vehicle in place in a slope, the device being that described above.
  • FIG. 1 schematically shows a device of the invention
  • FIG. 2 shows the diagram of a method of the invention.
  • a device of the invention can be designed from a system delivering a vehicle speed or tops corresponding to the rotation of at least one wheel.
  • the speed In the case of tops, the speed must be reconstructed by measuring the time intervals between two tops.
  • the system can take into account several wheels to have several information to minimize the detection interval of the tops and to deal with wheeled situations.
  • the same system or an additional system may deliver a signal corresponding to a steering angle of the steering wheel, representative of the steering angle of the wheels of the vehicle, in order to take this into account when calculating the speed of the vehicle and / or the detection of the tops of the wheels.
  • the device of the invention may also be based on an anti-lock wheel system (ABS) which delivers in part or in full the information multiplex networks of vehicles equipped with such a system.
  • ABS anti-lock wheel system
  • the device of the invention can also be designed from a motor control system that allows regulation in regime and torque thereof.
  • the device of the invention can be designed from a robotized transmission control system, to control the torque transmitted by the clutch when the controlled torque transmission means is a dry clutch, and allowing also interpret driver demands and control the gear ratio from the gears.
  • FIG. 1 represents a device of the invention in a basic configuration with indication of the direction of transmission of the different signals.
  • the device of the invention comprises means 1 for generating a signal corresponding to a speed of movement of the motor vehicle.
  • the means 1 are shaped to generate tops corresponding to a rotation of one or more wheels of the vehicle.
  • the means 1 thus generating signals indicating a movement of the vehicle may be supplemented by a sensor 2 for generating a signal corresponding to the steering angle of the steering wheel.
  • the means 1 and the sensor 2 are connected to a control system 3 for controlling the torque transmitted by the clutch and the transmission ratio of the gearbox.
  • the device also comprises control means 4 of the engine for regulating the speed and / or torque thereof, control means 5 of the torque transmission controlled means, control means 6 of the gearbox. and control means 7 of the motor assembly and torque transmission controlled means, shaped to grant the vehicle a speed of compensation with respect to the traveling speed.
  • control system 3 is integrated in the control means 7 which, themselves, may be integral part of a vehicle on-board computer for controlling and managing a set of functions performed in the vehicle.
  • the device finally comprises means 8 for activating the control means 7 of the motor assembly and the torque transmission controlled means, and for starting and stopping the operation of the device operating method, that is, to maintain a vehicle.
  • the means 8 comprise at least one detector for releasing the brake pedal.
  • the transmission torque is measured by a sensor 9 and the engaged transmission ratio is detected by a sensor 10.
  • the device of the invention is equipped with a single sensor 1 generating a signal as soon as the vehicle starts to move, the signal then being proportional to the speed of movement of the vehicle.
  • the wheels of the motor vehicle do not necessarily all have the same speed and, moreover, it is impossible to know in advance what will be the wheel that rotates faster and therefore allows more easily to detect the difference from a zero movement or a zero rotation speed. Consequently, it is more judicious to measure the speed of rotation of each of the wheels of the motor vehicle and, where appropriate, to supplement these measurements by a signal corresponding to the angle of the steering wheel, in particular when the sensors 1 do not measure the speed of rotation. speed of vehicle movement or wheel speed, but generate tops from which the vehicle will be restored. Taking into account the angle of the steering wheel during parking maneuvers makes it possible more particularly to minimize the detection interval of the tops.
  • the operation of the device of the invention corresponding to the operating method of this device according to the invention is as follows:
  • the device checks whether the motor vehicle is stopped entirely; for this it checks whether the driver presses on the brake pedal and if the speed of movement of the vehicle is zero; the device verifies whether a forward gear ratio or a gearbox reverse gear ratio is engaged and then verifies whether there is a non-zero moving speed of the vehicle after the initial stop; when the system has detected lifting the foot of the brake pedal, it passes a little torque through the controlled torque transmission means for example by the clutch, sending a setpoint to the control means of the motor assembly and controlled torque transmission means so that it is prepared to provide the torque that will be taken by the traction chain.
  • the device acquires the speed of the vehicle, whatever the acquisition means or the sensors by which such a corresponding signal is generated, and observes whether the low torque passing through the controlled torque transmission means causes an increase. in absolute value of the vehicle speed or a decrease.
  • the device of the invention controls the controlled torque transmission means and the engine to immobilize the vehicle by ensuring that this vehicle speed decreases.
  • Such a situation also corresponds, for example, to a restart after stopping in hill ahead or a niche maneuver when parking in a downhill. In both cases, the movement of the vehicle, contrary to the direction of the expected movement, is perceived negatively by the driver of the vehicle.
  • the implementation of the method of the invention is advantageously subject to the condition that there is an initial stopping of the vehicle caused by the simultaneous presence of the driver support on the brake pedal of the vehicle and a speed of zero displacement of the vehicle.
  • the transmission of control signals to the control means 7 of the motor assembly and the controlled torque transmission means in order to grant the vehicle a speed of compensation in relation to the speed of travel, does not start until the driver of the vehicle has fully released the brake pedal.
  • the device of the invention and the method of operation of this device have the main function of stabilizing the vehicles for the time necessary for the driver between the release of the brake pedal and the request for a command through the accelerator pedal, it may be useful to implement additional safety in the sense that this period necessary for the driver should not be too long.
  • the method can then be completed by a step of checking the duration between the relaxation of the brake pedal and the support on the accelerator in order to generate a set point for moving the vehicle when a predetermined limit time is exceeded.
  • Such an additional step by which, for example in the form of a blow generated from the clutch, the driver is reminded that a setpoint is expected from him, contributes to not unnecessarily use the torque transmission means.
  • the unfolding of the operating method of the invention can be interrupted at any time by the driver by the fact that he presses again on the brake.
  • This measurement is particularly advantageous in the case where the controlled torque transmission means is formed by a dry clutch which would then be used unnecessarily by sliding if the duration of this period between the release of the brake pedal and the support on the accelerator would be too long.
  • the progress of the operating method can also be interrupted by pressing the accelerator so as to request the transmission of a sufficiently strong torque to take off the vehicle and then cause the clutch sticking or continuous normal operation a controlled torque transmission means in the case of an automatic gearbox.
  • FIG. 2 The progress of the process of the invention is shown in FIG. 2, in which the diamonds and rectangles correspond to the following interrogations and operating conditions:
  • the process uses a means of measuring the speed of the vehicle.
  • the main measuring devices are ABS sensors and sensors on the secondary shaft or bridge. These sensors can be of the type detection of tops related to displacement or the analog signal type. The direction of rotation may be available depending on the realization of the sensors.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention concerns a device for maintaining a vehicle in place on a slope. The device comprises means (1) for generating a signal corresponding to a travelling speed of the motor vehicle, means for controlling (4) the engine enabling the speed and/or torque thereof to be regulated, means for controlling (6) the engine unit and torque transmission-controlled means, and means (7) for activating the means controlling (6) the engine unit and torque transmission-controlled means. The invention also concerns a method for operating such a device and a motor vehicle equipped with same.

Description

Dispositif permettant de maintenir un véhicule automobile en place dans une pente, procédé d'exploitation d'un tel dispositif et véhicule automobile équipé d'un tel dispositif Device for holding a motor vehicle in place on a slope, method of operating such a device and a motor vehicle equipped with such a device
L'invention concerne un dispositif permettant de maintenir un véhicule automobile en place dans une pente, un procédé d'exploitation d'un tel dispositif pour maintenir un véhicule automobile en place dans une pente, ainsi qu'un véhicule automobile comprenant un tel dispositif.The invention relates to a device for maintaining a motor vehicle in place in a slope, a method of operating such a device for holding a motor vehicle in place in a slope, and a motor vehicle comprising such a device.
Lors de manœuvres ou de décollages d'un véhicule automobile, et plus particulièrement lors de telles manœuvres sur une surface de circulation en pente, le véhicule peut avancer ou reculer, suivant la sens de la pente, entre le moment où le conducteur a enlevé son pied du frein et le moment où il pose son pied sur la pédale d'accélérateur et la chaîne de traction réagisse à la consigne demandée.During maneuvers or take-offs of a motor vehicle, and more particularly during such maneuvers on a sloping traffic surface, the vehicle may move forward or backward, depending on the direction of the slope, between the moment when the driver has removed his foot of the brake and the moment when he puts his foot on the accelerator pedal and the traction chain responds to the required instruction.
Dans cet intervalle de temps, le véhicule peut effectuer un déplacement qui peut atteindre des distances de l'ordre de 50 cm et qui est perçu négativement par le conducteur car ce déplacement n'est pas contrôlé par le conducteur ni en ce qui concerne la vitesse de déplacement ni en ce qui concerne la distance de déplacement. Ce phénomène est plus particulièrement sensible avec des véhicules automobiles équipés d'une boîte de vitesses pilotée ou robotisée ou équipés d'un moyen commandé de transmission de couple que l'on trouve habituellement dans des boîte de vitesses automatiques, puisque le conducteur n'a plus de pédale d'embrayage comme levier d'action et puisqu'il ne se sert plus, ou rarement, du frein à main comptant sur les prestations associées à sa boîte de vitesses.In this period of time, the vehicle can make a displacement which can reach distances of the order of 50 cm and which is perceived negatively by the driver because this movement is not controlled by the driver nor as regards the speed of movement or in relation to the travel distance. This phenomenon is more particularly noticeable with motor vehicles equipped with a controlled or robotized gearbox or equipped with a controlled torque transmission means that is usually found in automatic gearboxes, since the driver more clutch pedal as action lever and since it no longer uses, or rarely, the handbrake relying on the benefits associated with its gearbox.
Pour le cas où le moyen commandé de transmission de couple est un convertisseur de couple, le document US-A- 2005 0075 775 propose un dispositif agissant sur le régime de ralenti du moteur à combustion interne et sur la pression du liquide hydraulique du convertisseur de couple. Ainsi, ce dispositif permet de faire varier le couple de traînée lorsqu'un rapport de marche avant est engagé et de maintenir de cette manière le véhicule immobilisé.In the case where the controlled torque transmission means is a torque converter, US-A-20050075775 proposes a device acting on the idling speed of the internal combustion engine and the hydraulic fluid pressure of the torque converter. Thus, this device makes it possible to vary the drag torque when a forward gear is engaged and thereby maintain the immobilized vehicle.
Pour le cas où le moyen commandé de transmission de couple est un embrayage sec, le document US-A- 2004 0266 585 propose un dispositif comportant au moins deux embrayages, un embrayage principal et au moins un embrayage auxiliaire destinés à servir au maintien du véhicule en pente pendant les changements de rapport. Ces deux ou plusieurs embrayages coopèrent pour fournir à la fois du couple et un frein de parking pendant les changements de rapports.For the case where the controlled torque transmission means is a dry clutch, the document US-A-2004 0266 585 proposes a device comprising at least two clutches, a main clutch and at least one auxiliary clutch intended to serve to maintain the vehicle. sloping during gear changes. These two or more clutches cooperate to provide both torque and parking brake during shifting.
Le but de l'invention est de proposer une solution qui permette pour le moins d'éviter le recul d'un véhicule dans le sens montant avec un rapport de vitesse (marche avant) enclenchée et éviter l'avancement d'un véhicule dans le sens descendant avec un rapport de vitesse (marche arrière) enclenchée et qui présente un avantage d'une structure simple réalisable à un faible coût.The object of the invention is to propose a solution which at least makes it possible to avoid the recoil of a vehicle in the upward direction with a gear ratio (forward gear) engaged and to prevent the advance of a vehicle into the vehicle. downward direction with a gear ratio (reverse gear) engaged and which has the advantage of a simple structure achievable at a low cost.
Le but de l'invention est atteint avec un dispositif permettant de maintenir un véhicule automobile en place dans une pente, le véhicule automobile comportant un moteur à combustion interne, une boîte de vitesses et un moyen commandé de transmission de couple.The object of the invention is achieved with a device for maintaining a motor vehicle in place in a slope, the motor vehicle comprising an internal combustion engine, a gearbox and a controlled torque transmission means.
Selon l'invention, le dispositif comprend des moyens destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile, des moyens de contrôle du moteur permettant une régulation en régime et/ou couple de celui-ci, des moyens de contrôle du moyen commandé de transmission de couple, des moyens de contrôle de l'ensemble moteur et moyen commandé de transmission de couple, conformés pour octroyer au véhicule une vitesse de compensation par rapport à la vitesse de déplacement, et des moyens permettant d'activer les moyens de contrôle de l'ensemble moteur et moyen commandé de transmission de couple.According to the invention, the device comprises means for generating a signal corresponding to a speed of movement of the motor vehicle, engine control means for regulating the speed and / or torque thereof, control means of the controlled torque transmission means, control means of the motor assembly and controlled torque transmission means, shaped to grant the vehicle a speed of compensation with respect to the speed of movement, and means for activating the control means of the motor assembly and torque transmission controlled means.
L'idée qui est à la base de l'invention est d'utiliser une information sur le véhicule, qui est soit déjà disponible sur le véhicule en raison de la présence d'autres systèmes de contrôle, soit qui est facilement à rendre disponible avec des moyens simples, notamment avec des capteurs de vitesse.The idea underlying the invention is to use information on the vehicle, which is either already available on the vehicle because of the presence of other control systems, or is easily made available with simple means, especially with speed sensors.
La solution de l'invention permet de maintenir un véhicule dans une pente durant les manœuvres de stationnement ou du départ de ce stationnement, en agissant uniquement sur l'organe de couplage roues/moteur. Autrement dit, la solution de l'invention ne recourt ni à des moyens de freinage ni encore à des embrayages supplémentaires ou auxiliaires.The solution of the invention makes it possible to maintain a vehicle in a slope during the parking maneuvers or the start of this parking, by acting solely on the wheel / engine coupling member. In other words, the solution of the invention does not use braking means or additional clutches or auxiliary.
Le dispositif de l'invention est destiné en première ligne à des véhicules équipés d'une boîte de vitesses mécanique pilotée. Toutefois, le dispositif de l'invention peut également s'appliquer à une boîte de vitesses automatique, celle-ci bénéficiant déjà d'une partie de la commande du moyen commandé de transmission de couple.The device of the invention is intended in the first line for vehicles equipped with a controlled mechanical gearbox. However, the device of the invention can also be applied to an automatic gearbox, the latter already benefiting from part of the control of the controlled torque transmission means.
Selon le mode de réalisation ou une variante choisie, le dispositif de l'invention peut également avoir l'une ou l'autre des caractéristiques ci-après considérées isolément ou selon toute combinaison techniquement possible :According to the embodiment or a variant chosen, the device of the invention may also have one or the other of the following characteristics considered in isolation or in any technically possible combination:
- les moyens destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile, sont conformés pour engendrer des tops correspondant à une rotation d'au moins une roue du véhicule ;- The means for generating a signal corresponding to a moving speed of the motor vehicle, are shaped to generate tops corresponding to a rotation of at least one wheel of the vehicle;
- les moyens destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile, sont conformés pour engendrer des tops correspondant à une rotation de toutes les roues du véhicule ; les moyens destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile sont complétés par un capteur de l'angle du volant . les moyens destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile sont formés par des capteurs d'un système antiblocage des roues ; le dispositif comprend un système de contrôle d'une boîte de vitesse pilotée et d'un embrayage, le système permettant de contrôler le couple transmis par l'embrayage, de prendre en compte des demandes d'un conducteur du véhicule et de contrôler le rapport de transmission de la boîte de vitesses à partir des pignons de celle-ci.the means intended to generate a signal corresponding to a speed of movement of the motor vehicle, are shaped to generate tops corresponding to a rotation of all the wheels of the vehicle; the means for generating a signal corresponding to a speed of movement of the motor vehicle are supplemented by a sensor of the steering wheel angle. the means for generating a signal corresponding to a speed of movement of the motor vehicle are formed by sensors of an anti-lock system of the wheels; the device comprises a control system of a controlled gearbox and a clutch, the system making it possible to control the torque transmitted by the clutch, to take into account requests from a driver of the vehicle and to control the ratio transmission of the gearbox from the gears thereof.
Le but de l'invention est également atteint avec un procédé d'exploitation d'un dispositif décrit ci-avant. Selon l'invention un tel procédé comprend des étapes de vérification d'un arrêt initial du véhicule automobile, de vérification de l'engagement d'un rapport avant ou arrière de la boîte de vitesses, de vérification de la présence d'une vitesse de déplacement du véhicule après l'arrêt initial, et de l'émission de signaux de contrôle aux moyens de contrôle de l'ensemble moteur et moyen commandé de transmission de couple, pour octroyer au véhicule une vitesse de compensation par rapport à la vitesse de déplacement.The object of the invention is also achieved with a method of operating a device described above. According to the invention, such a method comprises steps of verifying an initial stoppage of the motor vehicle, checking the engagement of a gearbox front or rear gear ratio, checking the presence of a gearing speed. moving the vehicle after the initial stopping, and issuing control signals to the control means of the motor assembly and the controlled torque transmission means, to grant the vehicle a speed of compensation with respect to the traveling speed .
Un tel procédé d'exploitation peut comprendre, en plus, au moins l'une ou l'autre des étapes suivantes :Such an operating method may comprise, in addition, at least one or other of the following steps:
- la vérification de l'arrêt initial du véhicule est mise en œuvre par la vérification de la présence simultanée d'un appui sur la pédale de frein du véhicule et d'une vitesse de déplacement zéro du véhicule ;- The verification of the initial stopping of the vehicle is implemented by checking the simultaneous presence of a support on the brake pedal of the vehicle and a speed of zero movement of the vehicle;
- l'émission de signaux de contrôle aux moyens de contrôle de l'ensemble moteur et moyen commandé de transmission de couple pour octroyer au véhicule une vitesse de compensation par rapport à la vitesse de déplacement ne commence qu'à partir du relâchement de la pédale de frein.the emission of control signals to the control means of the motor assembly and the controlled means of transmission of torque to grant the vehicle a speed of compensation with respect to the speed of movement begins only after the release of the brake pedal.
Le but de l'invention est enfin atteint avec un véhicule automobile comprenant un dispositif permettant de maintenir le véhicule automobile en place dans une pente, le dispositif étant celui décrit plus haut.The object of the invention is finally achieved with a motor vehicle comprising a device for holding the motor vehicle in place in a slope, the device being that described above.
D'autres caractéristiques et avantages de la présente ressortiront de la description ci-après d'un mode de réalisation du dispositif de l'invention et de la description du procédé d'exploitation d'un tel dispositif. La description est faite en référence aux dessins dans lesquels : la figure 1 montre schématiquement un dispositif de l ' invention et la figure 2 montre le schéma d'un procédé de 1 ' invention.Other features and advantages of the present will become apparent from the following description of an embodiment of the device of the invention and the description of the method of operating such a device. The description is made with reference to the drawings in which: FIG. 1 schematically shows a device of the invention and FIG. 2 shows the diagram of a method of the invention.
Selon la présentation de la figure 1, un dispositif de l'invention peut être conçu à partir d'un système délivrant une vitesse de véhicule ou bien des tops correspondants à la rotation d'au moins une roue. Dans le cas des tops, la vitesse doit être reconstruite par mesure des intervalles de temps entre deux tops.According to the presentation of Figure 1, a device of the invention can be designed from a system delivering a vehicle speed or tops corresponding to the rotation of at least one wheel. In the case of tops, the speed must be reconstructed by measuring the time intervals between two tops.
Le système peut prendre en compte plusieurs roues pour avoir plusieurs informations permettant de minimiser l'intervalle de détection des tops et de traiter des situations de roues braquées.The system can take into account several wheels to have several information to minimize the detection interval of the tops and to deal with wheeled situations.
Le même système ou un système supplémentaire peut délivrer un signal correspondant à un angle de braquage du volant, représentatif de l'angle de braquage des roues du véhicule, afin d'en tenir compte pour le calcul de la vitesse du véhicule et/ou de la détection des tops des roues .The same system or an additional system may deliver a signal corresponding to a steering angle of the steering wheel, representative of the steering angle of the wheels of the vehicle, in order to take this into account when calculating the speed of the vehicle and / or the detection of the tops of the wheels.
Le dispositif de l'invention peut également être basé sur un système anti-blocage des roues (ABS) qui délivre en partie ou en totalité les informations nécessaires sur les réseaux multiplexes des véhicules équipés d'un tel système.The device of the invention may also be based on an anti-lock wheel system (ABS) which delivers in part or in full the information multiplex networks of vehicles equipped with such a system.
Le dispositif de l'invention peut aussi être conçu à partir d'un système de contrôle de moteur qui permet une régulation en régime et en couple de celui-ci.The device of the invention can also be designed from a motor control system that allows regulation in regime and torque thereof.
Enfin, le dispositif de l'invention peut être conçu à partir d'un système de contrôle de boîte de vitesses robotisée, permettant de contrôler le couple transmis par l'embrayage lorsque le moyen commandé de transmission de couple est un embrayage sec, et permettant également d'interpréter des demandes du conducteur et de contrôler le rapport de transmission à partir des pignons.Finally, the device of the invention can be designed from a robotized transmission control system, to control the torque transmitted by the clutch when the controlled torque transmission means is a dry clutch, and allowing also interpret driver demands and control the gear ratio from the gears.
La figure 1 représente un dispositif de l'invention selon une configuration de base avec indication de la direction de transmission des différents signaux.FIG. 1 represents a device of the invention in a basic configuration with indication of the direction of transmission of the different signals.
Ainsi, le dispositif de l'invention comprend des moyens 1 destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile. En alternative, les moyens 1 sont conformés pour engendrer des tops correspondants à une rotation d'une ou de plusieurs roues du véhicule. Les moyens 1 engendrant donc des signaux indicateurs d'un déplacement du véhicule, peuvent être complétés par un capteur 2 destiné à engendrer un signal correspondant à l'angle de braquage du volant. Les moyens 1 et le capteur 2 sont reliés à un système de contrôle 3 permettant de contrôler le couple transmis par l'embrayage et le rapport de transmission de la boîte de vitesses.Thus, the device of the invention comprises means 1 for generating a signal corresponding to a speed of movement of the motor vehicle. Alternatively, the means 1 are shaped to generate tops corresponding to a rotation of one or more wheels of the vehicle. The means 1 thus generating signals indicating a movement of the vehicle may be supplemented by a sensor 2 for generating a signal corresponding to the steering angle of the steering wheel. The means 1 and the sensor 2 are connected to a control system 3 for controlling the torque transmitted by the clutch and the transmission ratio of the gearbox.
Le dispositif comprend par ailleurs des moyens de contrôle 4 du moteur permettant une régulation en régime et/ou en couple de celui-ci, des moyens de contrôle 5 du moyen commandé de transmission de couple, des moyens de commande 6 de la boîte de transmission et des moyens de contrôle 7 de l'ensemble moteur et moyen commandé de transmission de couple, conformés pour octroyer au véhicule une vitesse de compensation par rapport à la vitesse de déplacement. Avantageusement, mais non nécessairement, le système de contrôle 3 est intégré dans les moyens de contrôle 7 qui, eux-mêmes, peuvent faire partie intégrante un ordinateur de bord du véhicule destiné à contrôler et à gérer un ensemble de fonctions réalisées dans le véhicule.The device also comprises control means 4 of the engine for regulating the speed and / or torque thereof, control means 5 of the torque transmission controlled means, control means 6 of the gearbox. and control means 7 of the motor assembly and torque transmission controlled means, shaped to grant the vehicle a speed of compensation with respect to the traveling speed. Advantageously, but not necessarily, the control system 3 is integrated in the control means 7 which, themselves, may be integral part of a vehicle on-board computer for controlling and managing a set of functions performed in the vehicle.
Le dispositif comprend enfin des moyens 8 permettant d'activer les moyens de contrôle 7 de l'ensemble moteur et moyen commandé de transmission de couple, et de démarrer et d'interrompre le déroulement du procédé d'exploitation du dispositif, c'est-à-dire du maintien en place d'un véhicule. Les moyens 8 comprennent au moins un détecteur de relâchement de la pédale de frein. Le couple de transmission est mesuré par un capteur 9 et le rapport de transmission engagé est détecté par un capteur 10.The device finally comprises means 8 for activating the control means 7 of the motor assembly and the torque transmission controlled means, and for starting and stopping the operation of the device operating method, that is, to maintain a vehicle. The means 8 comprise at least one detector for releasing the brake pedal. The transmission torque is measured by a sensor 9 and the engaged transmission ratio is detected by a sensor 10.
Dans sa forme la plus simple, le dispositif de l'invention est équipé d'un capteur unique 1 engendrant un signal dès que le véhicule commence à se déplacer, le signal étant alors proportionnel à la vitesse de déplacement du véhicule.In its simplest form, the device of the invention is equipped with a single sensor 1 generating a signal as soon as the vehicle starts to move, the signal then being proportional to the speed of movement of the vehicle.
Toutefois, lors de manœuvres de stationnement, les roues du véhicule automobile n'ont pas forcément toutes la même vitesse et, de plus, il est impossible de savoir d'avance quelle sera la roue qui tourne le plus rapidement et qui permet donc plus facilement de détecter la différence par rapport à un mouvement zéro ou une vitesse de rotation zéro. En conséquence, il est plus judicieux de mesurer la vitesse de rotation de chacune des roues du véhicule automobile et, le cas échéant, de compléter ces mesures par un signal correspondant à l'angle du volant, notamment lorsque les capteurs 1 ne mesurent pas la vitesse de déplacement du véhicule ou la vitesse de rotation des roues, mais engendrent des tops à partir desquels le véhicule sera reconstitué. La prise en compte de l'angle du volant pendant des manœuvres de stationnement permet plus particulièrement de minimiser l'intervalle de détection des tops. Le fonctionnement du dispositif de l'invention qui correspondant au procédé d'exploitation de ce dispositif selon l'invention est le suivant :However, during parking maneuvers, the wheels of the motor vehicle do not necessarily all have the same speed and, moreover, it is impossible to know in advance what will be the wheel that rotates faster and therefore allows more easily to detect the difference from a zero movement or a zero rotation speed. Consequently, it is more judicious to measure the speed of rotation of each of the wheels of the motor vehicle and, where appropriate, to supplement these measurements by a signal corresponding to the angle of the steering wheel, in particular when the sensors 1 do not measure the speed of rotation. speed of vehicle movement or wheel speed, but generate tops from which the vehicle will be restored. Taking into account the angle of the steering wheel during parking maneuvers makes it possible more particularly to minimize the detection interval of the tops. The operation of the device of the invention corresponding to the operating method of this device according to the invention is as follows:
- le dispositif vérifie si le véhicule automobile est arrêté entièrement ; pour cela il vérifie si le conducteur appuie sur la pédale de frein et si la vitesse de déplacement du véhicule est zéro ; le dispositif vérifie si un rapport de vitesse avant ou un rapport de vitesse arrière de la boîte de vitesses est engagé et vérifie ensuite s'il y a présence d'une vitesse de déplacement différente de zéro du véhicule après l'arrêt initial ; lorsque le système a détecté la levée de pied de la pédale de frein, il fait passer un peu de couple par le moyen commandé de transmission de couple par exemple par l'embrayage, en envoyant une consigne aux moyens de contrôle de l'ensemble moteur et moyen commandé de transmission de couple afin que celui-ci se prépare à fournir le couple qui va être prélevé par la chaîne de traction.the device checks whether the motor vehicle is stopped entirely; for this it checks whether the driver presses on the brake pedal and if the speed of movement of the vehicle is zero; the device verifies whether a forward gear ratio or a gearbox reverse gear ratio is engaged and then verifies whether there is a non-zero moving speed of the vehicle after the initial stop; when the system has detected lifting the foot of the brake pedal, it passes a little torque through the controlled torque transmission means for example by the clutch, sending a setpoint to the control means of the motor assembly and controlled torque transmission means so that it is prepared to provide the torque that will be taken by the traction chain.
Par la suite, le dispositif acquiert la vitesse du véhicule, quelques soient les moyens d'acquisition ou les capteurs par lesquels un tel signal correspondant soit engendré, et observe si le faible couple passant à travers le moyens commandé de transmission de couple provoque une augmentation en valeur absolue de la vitesse du véhicule ou une diminution.Subsequently, the device acquires the speed of the vehicle, whatever the acquisition means or the sensors by which such a corresponding signal is generated, and observes whether the low torque passing through the controlled torque transmission means causes an increase. in absolute value of the vehicle speed or a decrease.
En cas d'augmentation de la valeur absolue de la vitesse, c'est-à-dire lorsque le véhicule se déplace en sens descendant avec une vitesse "marche avant" ou lorsque, en sens montant, le véhicule se déplace avec une vitesse "marche arrière" engagée, le moyen commandé de transmission du couple est entièrement ouvert. Cette situation correspond alors à celle à laquelle tout conducteur de véhicule devrait être habitué, à savoir : lorsqu'il relâche le pied du frein et le véhicule est en marche avant et sur une descente, le véhicule avance, et lorsqu'il relâche le pied du frein et le véhicule est en marche arrière et en côte, le véhicule recule.In the case of an increase in the absolute value of the speed, that is to say when the vehicle is moving downwards with a speed "forward" or when, upstream, the vehicle moves with a speed " reversing "engaged, the controlled torque transmission means is fully open. This situation then corresponds to that to which every driver of a vehicle should be accustomed, namely: when he releases the foot of the brake and the vehicle is in forward motion and on a descent, the vehicle moves forward, and when he releases the brake foot and the vehicle is in reverse and uphill, the vehicle moves backwards.
Dans le cas où la valeur absolue de la vitesse diminue, le dispositif de l'invention commande le moyen commandé de transmission de couple et le moteur pour immobiliser le véhicule en faisant en sorte que cette vitesse du véhicule diminue. Une telle situation correspond d'ailleurs, par exemple, à un redémarrage après immobilisation en côte en marche avant ou à une manœuvre de créneau lors d'un stationnement dans une descente. Dans ces deux cas, le mouvement du véhicule, contraire au sens du mouvement attendu, est perçu négativement par le conducteur du véhicule.In the case where the absolute value of the speed decreases, the device of the invention controls the controlled torque transmission means and the engine to immobilize the vehicle by ensuring that this vehicle speed decreases. Such a situation also corresponds, for example, to a restart after stopping in hill ahead or a niche maneuver when parking in a downhill. In both cases, the movement of the vehicle, contrary to the direction of the expected movement, is perceived negatively by the driver of the vehicle.
La mise en œuvre du procédé de l'invention est avantageusement soumise à la condition qu'il y a préalablement un arrêt initial du véhicule occasionné par la présence simultanée de l'appui du conducteur sur la pédale de frein du véhicule et par une vitesse de déplacement zéro du véhicule. Selon un critère supplémentaire que l'on peut mettre en œuvre avec le procédé de l'invention, l'émission de signaux de contrôle aux moyens de contrôle 7 de l'ensemble moteur et moyen commandé de transmission de couple, pour octroyer au véhicule une vitesse de compensation par rapport à la vitesse de déplacement, ne commence qu'à partir du moment où le conducteur du véhicule a entièrement relâché la pédale de frein.The implementation of the method of the invention is advantageously subject to the condition that there is an initial stopping of the vehicle caused by the simultaneous presence of the driver support on the brake pedal of the vehicle and a speed of zero displacement of the vehicle. According to a further criterion which can be implemented with the method of the invention, the transmission of control signals to the control means 7 of the motor assembly and the controlled torque transmission means, in order to grant the vehicle a speed of compensation in relation to the speed of travel, does not start until the driver of the vehicle has fully released the brake pedal.
Etant donné que le dispositif de l'invention et le procédé d'exploitation de ce dispositif ont pour fonction principale de stabiliser les véhicules pendant la durée nécessaire au conducteur entre le relâchement de la pédale de frein et la demande d'une consigne à travers la pédale d'accélérateur, il peut s'avérer utile de mettre en œuvre une sécurité supplémentaire dans le sens que cette période nécessaire au conducteur ne doit pas être trop longue. Le procédé peut alors être complété par une étape de vérification de la durée entre le relâchement de la pédale de frein et l'appui sur l'accélérateur afin de générer une consigne de mise en mouvement du véhicule lorsqu'une durée limite prédéterminée est dépassée. Une telle étape supplémentaire par laquelle, par exemple sous forme d'un coup généré à partir de l'embrayage, le conducteur est rappelé qu'une consigne est attendue de sa part, contribue à ne pas user inutilement le moyen de transmission de couple.Since the device of the invention and the method of operation of this device have the main function of stabilizing the vehicles for the time necessary for the driver between the release of the brake pedal and the request for a command through the accelerator pedal, it may be useful to implement additional safety in the sense that this period necessary for the driver should not be too long. The method can then be completed by a step of checking the duration between the relaxation of the brake pedal and the support on the accelerator in order to generate a set point for moving the vehicle when a predetermined limit time is exceeded. Such an additional step by which, for example in the form of a blow generated from the clutch, the driver is reminded that a setpoint is expected from him, contributes to not unnecessarily use the torque transmission means.
Il va sans dire que le déroulement du procédé d'exploitation de l'invention peut être interrompu à tout moment par le conducteur par le fait qu'il appuie à nouveau sur le frein. Cette mesure est particulièrement intéressante dans le cas où le moyen commandé de transmission de couple est formé par un embrayage sec qui serait alors usé inutilement par glissement si la durée de cette période entre le relâchement de la pédale de frein et l'appui sur l'accélérateur serait trop longue.It goes without saying that the unfolding of the operating method of the invention can be interrupted at any time by the driver by the fact that he presses again on the brake. This measurement is particularly advantageous in the case where the controlled torque transmission means is formed by a dry clutch which would then be used unnecessarily by sliding if the duration of this period between the release of the brake pedal and the support on the accelerator would be too long.
Le déroulement du procédé d'exploitation peut par ailleurs être interrompu par un appui sur l'accélérateur de manière à demander la transmission d'un couple suffisamment fort pour décoller le véhicule et de provoquer ensuite le collage de l'embrayage ou le fonctionnement normal continu d'un moyen commandé de transmission de couple en cas d'une boîte de vitesses automatique.The progress of the operating method can also be interrupted by pressing the accelerator so as to request the transmission of a sufficiently strong torque to take off the vehicle and then cause the clutch sticking or continuous normal operation a controlled torque transmission means in the case of an automatic gearbox.
Le déroulement du procédé de l'invention est représenté sur la figure 2 où les losanges et rectangles correspondent aux interrogations et conditions de fonctionnement suivants :The progress of the process of the invention is shown in FIG. 2, in which the diamonds and rectangles correspond to the following interrogations and operating conditions:
"La pédale de frein est-elle appuyée et la vitesse véhicule à zéro ? ""Is the brake pedal pressed and the vehicle speed at zero?"
II faut partir de la pédale de frein appuyé et le véhicule arrêté.It is necessary to leave the brake pedal pressed and the vehicle stopped.
"La pédale de frein a-t-elle été relâchée ? ""Has the brake pedal been released?"
Le processus commence à partir du relâchement de la pédale de frein afin de compenser un éventuel mouvement si le véhicule est en pente. "Un rapport « marche avant » (MAV) ou « marche arrière » (MAR) est-il engagé ? "The process starts from the release of the brake pedal to compensate for any movement if the vehicle is sloping. "Is a" forward "(MAV) or" reverse "(MAR) report engaged?"
La compensation ne peut se faire qu'avec un rapport engagé puisqu'on utilise l'embrayage et le moteur pour transmettre du couple aux roues.Compensation can only be done with a gear engaged since the clutch and the motor are used to transmit torque to the wheels.
"Le véhicule est-il en train de se déplacer ? " Le processus utilise un moyen de mesure de la vitesse du véhicule. Les principaux moyens de mesure sont les capteurs du système ABS et des capteurs sur l'arbre secondaire ou le pont. Ces capteurs peuvent être du type détection de tops liés au déplacement ou du type signal analogique. Le sens de rotation peut être disponible en fonction de la réalisation des capteurs."Is the vehicle moving?" The process uses a means of measuring the speed of the vehicle. The main measuring devices are ABS sensors and sensors on the secondary shaft or bridge. These sensors can be of the type detection of tops related to displacement or the analog signal type. The direction of rotation may be available depending on the realization of the sensors.
"Augmenter les couples embrayage et moteur jusqu'à une valeur maximale. ""Increase clutch and motor torque to a maximum value."
On envoie du couple aux roues et on teste le sens de variation de la vitesse. Suivant les 4 cas de figures, MAV en côte, MAV en descente, MAR en côte de MAR en descente, le couple envoyé aux roues provoque soit une accélération (2 cas sur 4) soit un frein dans les 2 autres cas (MAV en côte, MAR en descente) . Les tests suivants déterminent l'effet du couple :We send torque to the wheels and test the direction of variation of the speed. According to the 4 cases of figures, MAV in slope, MAV in descent, MAR in coast of MAR in descent, the torque sent to the wheels provokes either an acceleration (2 cases on 4) or a brake in the 2 other cases (MAV in hill , MAR downhill). The following tests determine the effect of the couple:
"La vitesse du véhicule diminue-t-elle ? ""Does the speed of the vehicle decrease?"
"La vitesse du véhicule augmente-t-elle ? ""Does the speed of the vehicle increase?"
"Le véhicule est-il arrêté ? ""Is the vehicle stopped?"
"Ouvrir l'embrayage (montée avec MAR engagée ou descente avec MAV engagée) . ""Open the clutch (climb with MAR engaged or descent with MAV engaged)."
"Maintenir l'embrayage dans la position obtenue (durée éventuellement programmable) . ""Keep the clutch in the position obtained (possibly programmable duration)."
"La régulation consiste à déterminer le couple juste nécessaire pour immobiliser le véhicule pour les 2 cas qui nous intéressent. ""The regulation consists in determining the couple just needed to immobilize the vehicle for the two cases that interest us."
On teste si le sens de variation est celui attendu. Dans le cas négatif on ouvre l'embrayage pour ne pas accélérer le véhicule. Dans le cas positif on immobilise le véhicule puis on maintient l'embrayage dans la position déterminée. Le couple transmis est borné pour des questions de sûreté de fonctionnement. We test if the direction of variation is that expected. In the negative case we open the clutch so as not to accelerate the vehicle. In the positive case, the vehicle is immobilized and the clutch is kept in the determined position. The transmitted torque is limited for issues of dependability.

Claims

REVENDICATIONS
1. Dispositif permettant de maintenir un véhicule automobile en place dans une pente, le véhicule automobile comportant un moteur à combustion interne, une boîte de vitesses et un moyen commandé de transmission de couple, caractérisé en ce qu'il comprend des moyens (1) destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile, des moyens de contrôle (4) du moteur permettant une régulation en régime et/ou couple de celui-ci, des moyens de contrôle (5) du moyen commandé de transmission de couple, des moyens de contrôle (7) de l'ensemble moteur et moyen commandé de transmission de couple, conformés pour amener le moyen commandé de transmission de couple à fournir un faible couple provoquant une diminution en valeur absolue de la vitesse de déplacement du véhicule dans le sens d'une immobilisation du véhicule, des moyens (8) permettant d'activer les moyens de contrôle (7) de l'ensemble moteur et moyen commandé de transmission de couple.1. Device for holding a motor vehicle in place on a slope, the motor vehicle comprising an internal combustion engine, a gearbox and a controlled torque transmission means, characterized in that it comprises means (1). intended to generate a signal corresponding to a speed of movement of the motor vehicle, control means (4) of the engine for regulating speed and / or torque thereof, control means (5) of the controlled transmission means torque control means (7) of the motor assembly and torque transmission controlled means, shaped to cause the torque transmission controlled means to provide a low torque causing a decrease in absolute value of the speed of movement of the vehicle in the direction of immobilization of the vehicle, means (8) for activating the control means (7) of the motor assembly and controlled means of transmissio n of couples.
2. Dispositif selon la revendication 1, caractérisé en ce que les moyens (1) destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile, sont conformés pour engendrer des tops correspondant à une rotation d'au moins une roue du véhicule .2. Device according to claim 1, characterized in that the means (1) for generating a signal corresponding to a moving speed of the motor vehicle, are shaped to generate tops corresponding to a rotation of at least one wheel of the vehicle .
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les moyens (1) destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile, sont conformés pour engendrer des tops correspondant à une rotation de toutes les roues du véhicule . 3. Device according to claim 1 or 2, characterized in that the means (1) for generating a signal corresponding to a moving speed of the motor vehicle, are shaped to generate tops corresponding to a rotation of all the wheels of the vehicle .
4. Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les moyens (1) destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile sont complétés par un capteur (2) de l'angle du volant.4. Device according to any one of claims 1 to 3, characterized in that the means (1) for generating a signal corresponding to a moving speed of the motor vehicle are supplemented by a sensor (2) of the angle of the wheel.
5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les moyens (1) destinés à engendrer un signal correspondant à une vitesse de déplacement du véhicule automobile sont formés par des capteurs d'un système antiblocage des roues.5. Device according to any one of claims 1 to 4, characterized in that the means (1) for generating a signal corresponding to a moving speed of the motor vehicle are formed by sensors of an anti-lock system wheels.
6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il comprend un système de contrôle (3) d'une boîte de vitesse pilotée et d'un embrayage, le système (3) permettant de contrôler le couple transmis par l'embrayage, de prendre en compte des demandes d'un conducteur du véhicule et de contrôler le rapport de transmission de la boîte de vitesses à partir des pignons de celle-ci.6. Device according to any one of claims 1 to 5, characterized in that it comprises a control system (3) of a controlled gearbox and a clutch, the system (3) for controlling the torque transmitted by the clutch, to take into account requests from a driver of the vehicle and to control the transmission ratio of the gearbox from the gears thereof.
7. Procédé d'exploitation d'un dispositif selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend des étapes de vérification d'un arrêt initial du véhicule automobile, vérification de l'engagement d'un rapport avant ou arrière de la boîte de vitesses, vérification de la présence d'une vitesse de déplacement du véhicule après l'arrêt initial, émission de signaux de contrôle aux moyens de contrôle de l'ensemble moteur et moyen commandé de transmission de couple pour amener le moyen commandé de transmission de couple à fournir un faible couple provoquant une diminution en valeur absolue de la vitesse de déplacement du véhicule dans le sens d'une immobilisation du véhicule.7. A method of operating a device according to any one of claims 1 to 6, characterized in that it comprises steps of verification of an initial stop of the motor vehicle, verification of the commitment of a report. front or rear of the gearbox, checking for the presence of a speed of movement of the vehicle after the initial stoppage, issuing control signals to the control means of the motor assembly and controlled means of transmission of torque to bring the torque transmission controlled means to provide a low torque causing a decrease in absolute value of the speed of movement of the vehicle in the direction of immobilization of the vehicle.
8. Procédé selon la revendication 7, caractérisé en ce que la vérification de l'arrêt initial du véhicule est mise en œuvre par la vérification de la présence simultanée d'un appui sur la pédale de frein du véhicule et d'une vitesse de déplacement zéro du véhicule.8. Method according to claim 7, characterized in that the verification of the initial stop of the vehicle is implemented by checking the presence simultaneous pressing of the vehicle's brake pedal and a zero speed of movement of the vehicle.
9. Procédé selon la revendication 7 ou 8, caractérisé en ce que l'émission de signaux de contrôle aux moyens de contrôle (7) de l'ensemble moteur et moyen commandé de transmission de couple pour octroyer au véhicule une vitesse de compensation par rapport à la vitesse de déplacement ne commence qu'à partir du relâchement de la pédale de frein.Method according to claim 7 or 8, characterized in that the transmission of control signals to the control means (7) of the motor unit and the torque transmission controlled means for granting the vehicle a compensation speed with respect to at the speed of travel starts only after the release of the brake pedal.
10. Véhicule automobile, caractérisé en ce qu'il comprend un dispositif selon l'une quelconque des revendications 1 à 6. 10. Motor vehicle, characterized in that it comprises a device according to any one of claims 1 to 6.
PCT/FR2006/051001 2005-10-18 2006-10-06 Device for maintaining a motor vehicle in place on a slope, method for operating such a device and motor vehicle equipped with same WO2007045784A1 (en)

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FR0510603A FR2892081B1 (en) 2005-10-18 2005-10-18 DEVICE FOR MAINTAINING A MOTOR VEHICLE IN PLACE IN A SLOPE, METHOD FOR OPERATING SUCH A DEVICE AND MOTOR VEHICLE EQUIPPED WITH SUCH A DEVICE

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US20040266585A1 (en) 2001-11-08 2004-12-30 Tatsuya Ochi Gear type speed change unit control device, control method, and automobile
US20050075775A1 (en) 2003-10-02 2005-04-07 Carlson Richard W. Adaptive hill hold for automobile applications by redundant clutch apply

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19733465A1 (en) * 1996-08-20 1998-02-26 Volkswagen Ag Automatic clutch control arrangement for motor vehicle
DE19949203A1 (en) * 1998-10-14 2000-04-20 Luk Getriebe Systeme Gmbh Electronically controlled clutch device used to control/regulate clutch actuation and/or gearbox has automated change mechanism
DE19942715A1 (en) * 1999-09-08 2001-03-15 Mannesmann Sachs Ag Drive method for coupling device involves driving coupling to set coupling braking torque at least depending on detected inclination parameter if it corresponds to state causing rolling away
US20040266585A1 (en) 2001-11-08 2004-12-30 Tatsuya Ochi Gear type speed change unit control device, control method, and automobile
US20050075775A1 (en) 2003-10-02 2005-04-07 Carlson Richard W. Adaptive hill hold for automobile applications by redundant clutch apply

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FR2892081A1 (en) 2007-04-20

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