EP3426952A1 - Method for checking the configuration safety of a coupling device - Google Patents

Method for checking the configuration safety of a coupling device

Info

Publication number
EP3426952A1
EP3426952A1 EP17707368.1A EP17707368A EP3426952A1 EP 3426952 A1 EP3426952 A1 EP 3426952A1 EP 17707368 A EP17707368 A EP 17707368A EP 3426952 A1 EP3426952 A1 EP 3426952A1
Authority
EP
European Patent Office
Prior art keywords
neutral
coupling device
configuration
control method
position information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17707368.1A
Other languages
German (de)
French (fr)
Inventor
Adrien CHAMEROY
Cédric CHANTREL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Nissan Motor Co Ltd
Original Assignee
Renault SAS
Nissan Motor Co Ltd
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 Renault SAS, Nissan Motor Co Ltd filed Critical Renault SAS
Publication of EP3426952A1 publication Critical patent/EP3426952A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/50—Signals to an engine or motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/2807—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted using electric control signals for shift actuators, e.g. electro-hydraulic control therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/0403—Synchronisation before shifting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F16H2059/6807—Status of gear-change operation, e.g. clutch fully engaged
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F16H2059/6823—Sensing neutral state of the transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/0403—Synchronisation before shifting
    • F16H2061/0422—Synchronisation before shifting by an electric machine, e.g. by accelerating or braking the input shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
    • F16H2061/1208—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures with diagnostic check cycles; Monitoring of failures
    • F16H2061/1212—Plausibility checks; Counting means for repeated failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
    • F16H2061/122—Avoiding failures by using redundant parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2306/00—Shifting
    • F16H2306/40—Shifting activities
    • F16H2306/48—Synchronising of new gear
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • the present invention relates to the control of transmissions, with regard to the operational safety and the approval of shifts made by means of dog clocks, or cleats, without mechanical synchronizers, in transmissions where the synchronization of gears on their shaft is ensured by proper steering of the motor sources.
  • a gearbox coupling device secured to a rotation of a movement input shaft thereof, and movable axially on the shaft of on either side of an intermediate neutral position, between two opposite positions, engagement with a crazy gear.
  • This invention has a preferred application, but not limited to, hybrid GMPs (powertrains) having several driving sources, in particular a heat engine and one or more electrical machines.
  • GMPs powertrains
  • the transmission of energy from the powertrain to the wheel is through a multi-configuration gearbox. Moving from one configuration to another requires the synchronization of different elements of the box. Between two engaged gear positions, the sprocket coupling devices have a "neutral configuration", in which power transmission between the GMP and the wheel is cut off.
  • the present invention aims to ensure that the synchronization phase is performed in the absence of torque transmitted to the wheel.
  • redundant position information is used to secure the neutral configuration.
  • FIG. 1 is a simplified representation of a vehicle kinematic chain
  • FIG. 2 is a general diagram of the proposed method
  • FIGS. 3A to 3D show different relative positions of the dogs of the player and the pinion
  • Figures 4A and 4B are timing diagrams.
  • FIG. 1 schematically shows the simplified kinematic chain of a vehicle between its drive motor 1, its gearbox 2 and its wheels 3.
  • the movement enters the box via an input shaft 4, and comes out of it by an output shaft 5 connected to the wheels 6. It descends from the input shaft 4 on the output shaft 5, by one or the other of two gear slopes 6a, 6b; 7a, 7b, defining two different transmission ratios.
  • the coupling device 8 also called walkman, with claws, or jaw, is integral in rotation with the movement input shaft 4.
  • This coupling device is axially movable on this shaft, on both sides. other of an intermediate neutral position, between two opposite positions of engagement on one of the two speed gears, or idle gears 6a, 7a, which are stationary axially on the shaft 4.
  • the coupling device 8 has two configurations of engagement L and R, depending on the position of the player.
  • the method of the invention controls the position of such a coupling device. It uses purposefully two redundant information, to estimate the configuration of the device.
  • the main information F is a continuous variable between the Min and Max terminals, and centered on zero. It is representative of the position of the coupling device.
  • the second information, FR which is redundant, and summary, compared to the first, takes two possible states: [Neutral] Or [Not Neutral].
  • the preliminary analysis of the device highlights the following risk. If synchronization is performed while the coupling system is coupled, the GMP is controlled to achieve a fixed speed, regardless of the driver's desire. During the transient phases, this control can lead to an inadvertent acceleration, or to an untimely deceleration. When the speed is stabilized, the GMP no longer responds to deceleration requests.
  • FIG. 2 refers to four particular positions of the device, corresponding to values 0,, ⁇ and ⁇ of F, as a function of the relative position of clabots or claws 8c of the sliding gear, relative to the fixed toothing (jaws or clabots) 7c of the idler gear, which are illustrated by FIGS. 3A to 3D:
  • F ⁇ , applicative value of F, where the overlap dd is sufficient to ensure the commitment of a report.
  • the initial position "init" of fig 2 is by definition unknown.
  • the neutral configuration of the coupling device is defined according to the main position information F of the player, and its displacement setpoint C when the transmission of the torque to the wheel is effectively interrupted.
  • the device goes through an uncertain commitment state, when sending a commitment commitment R, L or when sending a neutral setpoint N with a non-neutral main information F.
  • From “uncertain R”, we go to "Committed R" with a set point C R, if F> ⁇ .
  • the neutral configuration is determined, when the setpoint C is in neutral, and the main position information F is in the zone [-a, +] to ensure that no torque is transmitted,
  • a passage of the coupling device is detected, from an uncertain state of engagement to a committed state (R, L), if the main position information takes an application value
  • the coupling device is authorized to start the synchronization of the player with one of the two gears 6a, 7a for the purpose of engaging a gear, when the coupling device is in the neutral configuration.
  • the method takes into account two particular durations ⁇ and ⁇ , the exit confirmation time of the secure neutral, and the confirmation time of the uncertain states: a coupling device failure is detected if the main position information
  • the neutral configuration is secured by redundant information FR on the neutral or non-neutral configuration of the device. Maintaining the redundant information FR on its non-neutral value during a confirmation time ⁇ , while the coupling device is in a neutral configuration, determines a failure of the neutral state.
  • We detect a Failure of the neutral position (“Safety neutral failure" in English) if F ⁇ - or F> during the confirmation period ⁇ , or if the redundant information FR goes to "non-neutral" during the confirmation period ⁇ .
  • This failure can also be detected by maintaining the main position information outside an area [-a, +] to ensure that no torque is transmitted. In any case, the failure state implies a stop of the synchronization.
  • FIG. 4A illustrates the sequencing of the method without confirmation of a fault.
  • the coupling device leaves the state "R engaged” to go to "Unspecified R". Synchronization actually begins at ti, when the neutral configuration is reached. The neutral command is aborted after ti. The transition from redundant information FR to neutral confirms the neutral configuration.
  • the fault is confirmed at the end of the time ⁇ , of the output confirmation of the neutral configuration, measured from the beginning of the synchronization ti.
  • a failure of the neutral configuration is detected, if the main position information F remains outside the range [-, +], after the confirmation time of the uncertain states ⁇ .
  • the configuration taken into account for the control of the GMP, and the triggering of the synchronization is obtained from the main information F and the desired position (the set point C).
  • the main information F indicates a neutral configuration
  • the synchronization can start.
  • the redundant information F is used to secure the neutral configuration.
  • the transition to the neutral failure state is used to trigger, after a confirmation time, the safety procedure ensuring the safe state of the vehicle, for example to stop the synchronization.
  • the invention has many advantages. In particular, it makes it possible to minimize, with a high level of safety, the impact of a synchronization on the road behavior of a vehicle, to avoid unwanted accelerations or decelerations, while optimizing driving pleasure.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

Method for checking the configuration safety of a coupling device (8) for a gear box sliding gear (8c) that is rotationally connected to a drive input shaft (4) of the gearbox and is axially movable on the shaft, on either side of an intermediate neutral position, between two opposite positions of engagement with an idler pinion (6a, 7a), characterised in that a neutral configuration of the coupling device (8) is defined on the basis of a main information (F) relating to the position of the slider gear and its movement setting (C), in which position the transmission of the torque to the wheel is effectively stopped, and in that the start of synchronisation of the slider gear with a pinion (6a, 6b) is only allowed when the device (8) is in this configuration.

Description

PROCEDE DE CONTROLE SECURITAIRE DE LA CONFIGURATION D ' UN  METHOD FOR SECURELY MONITORING THE CONFIGURATION OF A
DISPOSITF D ' ACCOUPLEMENT  COUPLING PROVIDER
La présente invention concerne le contrôle des transmissions, en ce qui concerne la sécurité de fonctionnement et l'agrément des changements de vitesses effectués par l'intermédiaire de baladeurs à crabots, ou à clabots, sans synchroniseurs mécaniques, dans des transmissions où la synchronisation des pignons sur leur arbre est assurée par un pilotage approprié des sources motrices . The present invention relates to the control of transmissions, with regard to the operational safety and the approval of shifts made by means of dog clocks, or cleats, without mechanical synchronizers, in transmissions where the synchronization of gears on their shaft is ensured by proper steering of the motor sources.
Plus précisément, elle a pour objet un procédé de contrôle sécuritaire de la configuration d'un dispositif d'accouplement de boîte de vitesses solidaire en rotation d'un arbre d'entrée de mouvement de celle-ci, et mobile axialement sur cet arbre de part et d'autre d'une position neutre intermédiaire, entre deux positions opposées, d'engagement avec un pignon fou.  More specifically, it relates to a method of securely controlling the configuration of a gearbox coupling device secured to a rotation of a movement input shaft thereof, and movable axially on the shaft of on either side of an intermediate neutral position, between two opposite positions, engagement with a crazy gear.
Cette invention trouve une application privilégiée, mais non limitative, sur des GMP (groupes motopropulseurs) hybrides, disposant de plusieurs sources motrices, en particulier un moteur thermique et une, ou plusieurs, machines électriques.  This invention has a preferred application, but not limited to, hybrid GMPs (powertrains) having several driving sources, in particular a heat engine and one or more electrical machines.
Dans la plupart des véhicules routiers, la transmission de l'énergie depuis le groupe motopropulseur vers la roue, se fait au travers d'une boîte de vitesses à configurations multiples. Le passage d'une configuration à l'autre, nécessite la synchronisation de différents éléments de la boîte. Entre deux positions de rapport engagé, les dispositifs d'accouplement des pignons disposent d'une « configuration neutre », dans laquelle la transmission d'énergie entre le GMP et la roue est coupée.  In most road vehicles, the transmission of energy from the powertrain to the wheel is through a multi-configuration gearbox. Moving from one configuration to another requires the synchronization of different elements of the box. Between two engaged gear positions, the sprocket coupling devices have a "neutral configuration", in which power transmission between the GMP and the wheel is cut off.
Lorsque les dispositifs d'accouplement sont munis de moyens de synchronisation mécaniques intégrés, ces moyens assurent eux- mêmes la synchronisation d'un baladeur avec un pignon, pendant son déplacement vers le pignon.  When the coupling devices are provided with integrated mechanical synchronization means, these means themselves ensure the synchronization of a player with a pinion, during its movement towards the pinion.
Lorsque la synchronisation des pignons n'est pas assurée par un système de synchronisation mécanique intégré, on peut l'assurer au travers d'un pilotage approprié des moteurs du GMP. Dans tous les cas, on cherche à minimiser l'impact de la synchronisation sur le comportement routier. When synchronization of the pinions is not ensured by an integrated mechanical synchronization system, it can be ensured through appropriate control of the GMP engines. In all cases, we try to minimize the impact of synchronization on road behavior.
Lorsque la synchronisation se fait sur la base d'une régulation en vitesse, il est nécessaire d'assurer de façon sécuritaire que l'énergie mobilisée pour cette synchronisation ne soit pas transmise à la roue.  When the synchronization is done on the basis of speed regulation, it is necessary to ensure in a safe way that the energy mobilized for this synchronization is not transmitted to the wheel.
La présente invention a pour but de s'assurer que la phase de synchronisation soit réalisée en l'absence de couple transmis à la roue.  The present invention aims to ensure that the synchronization phase is performed in the absence of torque transmitted to the wheel.
Dans ce but, elle propose de définir une configuration neutre du dispositif d'accouplement en fonction d'une information de position principale du dispositif de déplacement et de sa consigne de déplacement, position dans laquelle la transmission du couple à la roue est effectivement interrompue, et d'autoriser le démarrage de la synchronisation du baladeur avec un pignon, seulement lorsque le dispositif est dans cette configuration.  For this purpose, it proposes to define a neutral configuration of the coupling device according to a main position information of the displacement device and its displacement setpoint, in which position the transmission of torque to the wheel is effectively interrupted, and allow the start of synchronization of the player with a pinion, only when the device is in this configuration.
De préférence, une information redondante de position, est utilisée pour sécuriser la configuration neutre.  Preferably, redundant position information is used to secure the neutral configuration.
La présente invention sera mieux comprise à la lecture de la description suivante, d'un mode de réalisation non limitatif de celle-ci, en se reportant aux dessins annexés, sur lesquels :  The present invention will be better understood on reading the following description of a nonlimiting embodiment thereof, with reference to the appended drawings, in which:
la figure 1 est une représentation simplifiée de chaîne cinématique de véhicule,  FIG. 1 is a simplified representation of a vehicle kinematic chain,
la figure 2 est un diagramme général de la méthode proposée ,  Figure 2 is a general diagram of the proposed method,
les figures 3A à 3D montrent différentes positions relatives des crabots du baladeur et du pignon, et  FIGS. 3A to 3D show different relative positions of the dogs of the player and the pinion, and
les figures 4A et 4B sont des chronogrammes de séquencement .  Figures 4A and 4B are timing diagrams.
Sur la figure 1, on a représenté de façon schématique la chaîne cinématique simplifiée d'un véhicule, entre son moteur d'entraînement 1, sa boîte de vitesses 2 et ses roues 3. Le mouvement entre dans la boîte par un arbre d'entrée 4, et en ressort par un arbre de sortie 5 relié aux roues 6. Il descend de l'arbre d'entrés 4 sur l'arbre de sortie 5, par l'une ou l'autre de deux descentes d'engrenages 6a, 6b ; 7a, 7b, définissant deux rapports de transmission différents. Le dispositif d'accouplement 8, aussi nommé baladeur, à clabots, ou à crabots, est solidaire en rotation de l'arbre d'entrée de mouvement 4. Ce dispositif d'accouplement est mobile axialement sur cet arbre, de part et d'autre d'une position neutre intermédiaire, entre deux positions opposées d'engagement sur l'un des deux pignons de vitesse, ou pignons fous 6a, 7a, qui sont immobiles axialement sur l'arbre 4. Le dispositif d'accouplement 8 dispose de deux configurations d'engagement L et R, dépendant de la position du baladeur. FIG. 1 schematically shows the simplified kinematic chain of a vehicle between its drive motor 1, its gearbox 2 and its wheels 3. The movement enters the box via an input shaft 4, and comes out of it by an output shaft 5 connected to the wheels 6. It descends from the input shaft 4 on the output shaft 5, by one or the other of two gear slopes 6a, 6b; 7a, 7b, defining two different transmission ratios. The coupling device 8, also called walkman, with claws, or jaw, is integral in rotation with the movement input shaft 4. This coupling device is axially movable on this shaft, on both sides. other of an intermediate neutral position, between two opposite positions of engagement on one of the two speed gears, or idle gears 6a, 7a, which are stationary axially on the shaft 4. The coupling device 8 has two configurations of engagement L and R, depending on the position of the player.
Le procédé de l'invention contrôle la position d'un tel dispositif d'accouplement. Il exploite à dessein deux informations redondantes, permettant d'estimer la configuration du dispositif. L'information principale F est une variable continue entre les bornes Min et Max, et centrée sur zéro. Elle est représentative de la position du dispositif d'accouplement. La seconde information, FR qui est redondante, et sommaire, par rapport à la première, prend deux états possibles : [Neutre] Ou [Non Neutre] .  The method of the invention controls the position of such a coupling device. It uses purposefully two redundant information, to estimate the configuration of the device. The main information F is a continuous variable between the Min and Max terminals, and centered on zero. It is representative of the position of the coupling device. The second information, FR which is redundant, and summary, compared to the first, takes two possible states: [Neutral] Or [Not Neutral].
L'analyse préliminaire du dispositif met en évidence le risque suivant. Si la synchronisation est réalisée alors que le système d'accouplement est accouplé, le GMP est piloté pour atteindre une vitesse fixe, indépendamment de la volonté du conducteur. Pendant les phases transitoires, ce pilotage peut conduire à une accélération intempestive, ou à une décélération intempestive. Lorsque la vitesse est stabilisée, le GMP ne répond plus aux demandes de décélération.  The preliminary analysis of the device highlights the following risk. If synchronization is performed while the coupling system is coupled, the GMP is controlled to achieve a fixed speed, regardless of the driver's desire. During the transient phases, this control can lead to an inadvertent acceleration, or to an untimely deceleration. When the speed is stabilized, the GMP no longer responds to deceleration requests.
Sur le diagramme de la figure 2, on définit différents états du dispositif d'accouplement, accessibles à partir d'un état initial « init », selon les valeurs prises par :  In the diagram of FIG. 2, different states of the coupling device, accessible from an initial state "init", are defined according to the values taken by:
une information principale de position F du dispositif, centrée sur 0 au neutre,  a main position information F of the device, centered on 0 in the neutral,
une information volontairement redondante de position du dispositif FR, prenant les valeurs 0 au neutre et 1 en dehors du neutre, et  a voluntarily redundant position information of the device FR, taking the values 0 to neutral and 1 outside the neutral, and
la consigne de déplacement C du dispositif.  the displacement instruction C of the device.
Le diagramme de la figure 2 se réfère à quatre positions particulières du dispositif, correspondant à des valeurs 0, , γ et δ de F, en fonction de la position relative des clabots ou crabots 8c du baladeur, par rapport à la denture fixe (crabots ou clabots) 7c du pignon fou, qui sont illustrées par les figures 3A à 3D : The diagram of FIG. 2 refers to four particular positions of the device, corresponding to values 0,, γ and δ of F, as a function of the relative position of clabots or claws 8c of the sliding gear, relative to the fixed toothing (jaws or clabots) 7c of the idler gear, which are illustrated by FIGS. 3A to 3D:
la figure 3A correspond à la position neutre : F = 0 sur la figure 3B, F = a, valeur applicative de F définissant la distance cfe entre -a et + où aucun couple n'est transmis aux roues,  FIG. 3A corresponds to the neutral position: F = 0 in FIG. 3B, F = a, application value of F defining the distance cfe between -a and + where no torque is transmitted to the wheels,
- sur la figure 3C F = γ, valeur applicative de F détectant un problème d'engagement, dans laquelle le chevauchement dc des crabots est insuffisant pour assurer l'engagement du rapport,- Figure 3C F = γ, application F value detecting a problem of engagement, wherein the overlap d c of the jaw is sufficient to ensure engagement of the report,
- sur la figure 3D, F = δ, valeur applicative de F, où le chevauchement dd est suffisant pour assurer l'engagement d'un rapport . - In Figure 3D, F = δ, applicative value of F, where the overlap dd is sufficient to ensure the commitment of a report.
La position initiale « init » de la figue 2 est par définition inconnue. On définit la configuration neutre du dispositif d'accouplement en fonction de l'information principale de position F du baladeur, et de sa consigne de déplacement C lorsque la transmission du couple à la roue est effectivement interrompue. La consigne d'engagement du rapport de gauche est notée L (C = L) ; la consigne d'engagement du rapport droit est notée R (C = L) .  The initial position "init" of fig 2 is by definition unknown. The neutral configuration of the coupling device is defined according to the main position information F of the player, and its displacement setpoint C when the transmission of the torque to the wheel is effectively interrupted. The commitment instruction of the left-hand ratio is noted L (C = L); the commitment statement of the right ratio is noted R (C = L).
Le dispositif passe par un état d'engagement incertain, lors de l'envoi d'une consigne d'engagement R, L ou lors de l'envoi d'une consigne de neutre N avec une information principale F non neutre. La consigne d'engagement L, C = L, ou la consigne de neutre C = N, associée à une information de position négative F < 0, place le dispositif dans un état d'engagement incertain à gauche « Incertain L ». De même, C = R, ou [ C = N et F >= 0 ] , place le dispositif en état d'engagement incertain à droite « Incertain R ». D' « incertain R », on passe à « Engagé R » avec a consigne C = R, si F > δ. De même, on passe d' « incertain L » à « Engagé L » avec la consigne C = L, si F < -δ et C = L. D'« Engagé L » on repasse en « Incertain L » si C = N ou F > -γ ; d'« Engagé R » on repasse en « Incertain R » si C = N ou F < γ. Le passage d'« Incertain L » à « Incertain R » suit une consigne C = R ; le passage inverse suit une consigne C = L. La configuration neutre recherchée, ou « Neutre sécurisé » (pour « safety neutral » en anglais) est atteinte, soit à partir d' « Incertain L » avec les consigne C = N et a < F < a, soit à partir d' « Incertain R » avec la consigne C = N et -a < F < . A l'inverse, on repasse du neutre sécurisé dans les états incertains, avec les consignes C = L ou C = R. The device goes through an uncertain commitment state, when sending a commitment commitment R, L or when sending a neutral setpoint N with a non-neutral main information F. The commitment set point L, C = L, or the neutral setpoint C = N, associated with a negative position information F <0, places the device in an uncertain commitment state on the left "Uncertain L". Similarly, C = R, or [C = N and F> = 0], places the device in an uncertain commitment state on the right "Uncertain R". From "uncertain R", we go to "Committed R" with a set point C = R, if F> δ. Similarly, we go from "uncertain L" to "Engaged L" with the set point C = L, if F <-δ and C = L. From "Committed L" we go back to "Uncertain L" if C = N or F>-γ; from "Committed R" one returns to "Uncertain R" if C = N or F <γ. The passage from "Uncertain L" to "Uncertain R" follows a set point C = R; the reverse passage follows a set point C = L. The desired neutral configuration, or "safe neutral" (for "safety neutral" in English) is reached, either from "Uncertain L" with setpoints C = N and a <F <a, or from "Uncertain R" with the set point C = N and -a <F <. Conversely, we go back from the secure neutral in the uncertain states, with the instructions C = L or C = R.
Ainsi :  So :
la configuration neutre est déterminée, lorsque la consigne C est au neutre, et que l'information de position principale F est dans la zone [-a, + ] permettant d'assurer qu'aucun couple n'est transmis,  the neutral configuration is determined, when the setpoint C is in neutral, and the main position information F is in the zone [-a, +] to ensure that no torque is transmitted,
- on détecte un passage du dispositif d'accouplement, d'un état d'engagement incertain à un état engagé (R, L) , si l'information principale de position prend une valeur applicative a passage of the coupling device is detected, from an uncertain state of engagement to a committed state (R, L), if the main position information takes an application value
(δ) assurant l'engagement, et (δ) ensuring commitment, and
-à l'inverse, on détecte un passage du dispositif, d'un état engagé (R, L) à un état d'engagement incertain, si l'information principale de position prend une valeur applicative -Inversely, it detects a passage of the device, a committed state (R, L) to an uncertain commitment state, if the main position information takes an application value
(γ) assurant le non engagement. (γ) ensuring the non-commitment.
Conformément à l'invention, on autorise le démarrage de la synchronisation du baladeur avec l'un des deux pignons 6a, 7a en vue de l'engagement d'un rapport, lorsque le dispositif d'accouplement est dans la configuration neutre. La méthode prend en compte deux durées particulières τ et τ∑, respectivement temps de confirmation de sortie du neutre sécurisé, et temps de confirmation des états incertains : on détecte une défaillance du dispositif d'accouplement si l'information principale de position According to the invention, it is authorized to start the synchronization of the player with one of the two gears 6a, 7a for the purpose of engaging a gear, when the coupling device is in the neutral configuration. The method takes into account two particular durations τ and τΣ, the exit confirmation time of the secure neutral, and the confirmation time of the uncertain states: a coupling device failure is detected if the main position information
(F) reste en dehors de la [-a, + ] après un temps de confirmation \2, des états incertains. (F) remains outside the [-a, +] after a confirmation time \ 2, uncertain states.
La configuration neutre est sécurisée par une information redondante FR sur la configuration neutre, ou non neutre, du dispositif. Le maintien de l'information redondante FR sur sa valeur non neutre pendant un temps de confirmation τ, alors que le dispositif d'accouplement est en configuration neutre, détermine une défaillance de l'état neutre. On détecte une défaillance de la position neutre (« Safety neutral failure » en anglais) si F < - ou F > pendant la durée de confirmation τ, ou si l'information redondante FR passe en « non neutre » pendant la durée de confirmation τ . Cette défaillance peut aussi être détectée par un maintien de l'information de position principale en dehors d'une zone [-a, + ] permettant d'assurer qu'aucun couple n'est transmis. Dans tous les cas, l'état de défaillance implique un arrêt de la synchronisation. The neutral configuration is secured by redundant information FR on the neutral or non-neutral configuration of the device. Maintaining the redundant information FR on its non-neutral value during a confirmation time τ, while the coupling device is in a neutral configuration, determines a failure of the neutral state. We detect a Failure of the neutral position ("Safety neutral failure" in English) if F <- or F> during the confirmation period τ, or if the redundant information FR goes to "non-neutral" during the confirmation period τ. This failure can also be detected by maintaining the main position information outside an area [-a, +] to ensure that no torque is transmitted. In any case, the failure state implies a stop of the synchronization.
Par ailleurs, on détecte une défaillance gauche (« Undefined (L) Failure ») si F > a pendant 12, à partir d'« incertain L », ou une défaillance droite (« Undefined (R) Failure ») à partir d' « incertain R » si F < -a pendant τ2. In addition, a left failure ("Undefined (L) Failure") is detected if F> has for 12, from "uncertain L", or a right failure ("Undefined (R) Failure") from "uncertain R" if F <-a during τ 2.
La figure 4A illustre le séquencement du procédé, sans confirmation de défaut. A to, date de la commande de neutre, le dispositif d'accouplement quitte l'état « R engagé » pour passer en « Incertain R ». La synchronisation commence effectivement à ti, lorsque la configuration neutre est atteinte. La commande de neutre est abandonnée après ti. Le passage de l'information redondante FR au neutre, confirme la configuration neutre.  FIG. 4A illustrates the sequencing of the method without confirmation of a fault. At to, date of the neutral command, the coupling device leaves the state "R engaged" to go to "Unspecified R". Synchronization actually begins at ti, when the neutral configuration is reached. The neutral command is aborted after ti. The transition from redundant information FR to neutral confirms the neutral configuration.
Sur la figure 4B, le défaut est confirmé à l'issue du temps τ, de confirmation de sortie de la configuration neutre, mesuré à partir du début de la synchronisation ti. Comme indiqué plus haut, on détecte une défaillance de la configuration neutre, si l'information principale de position F reste en dehors de la plage [- , + ] , après le temps de confirmation des états incertains τ∑.  In FIG. 4B, the fault is confirmed at the end of the time τ, of the output confirmation of the neutral configuration, measured from the beginning of the synchronization ti. As indicated above, a failure of the neutral configuration is detected, if the main position information F remains outside the range [-, +], after the confirmation time of the uncertain states τΣ.
En résumé, la configuration prise en compte pour le contrôle du GMP, et le déclenchement de la synchronisation, est obtenue à partir de l'information principale F et de la position voulue (la consigne C) . Dès que l'information principale F indique une configuration neutre, la synchronisation peut démarrer. L'information redondante F est utilisée pour sécuriser la configuration neutre. Le passage dans l'état de défaillance neutre, permet de déclencher, après un temps de confirmation, la procédure de sécurité assurant la mise en état sûr du véhicule, par exemple pour arrêter la synchronisation. L'invention présente de nombreux avantages. Elle permet en particulier de minimiser, avec un niveau de sécurité élevé, l'impact d'une synchronisation sur le comportement routier d'un véhicule, pour éviter des accélérations ou des décélérations intempestives, tout en optimisant l'agrément de conduite. In summary, the configuration taken into account for the control of the GMP, and the triggering of the synchronization, is obtained from the main information F and the desired position (the set point C). As soon as the main information F indicates a neutral configuration, the synchronization can start. The redundant information F is used to secure the neutral configuration. The transition to the neutral failure state is used to trigger, after a confirmation time, the safety procedure ensuring the safe state of the vehicle, for example to stop the synchronization. The invention has many advantages. In particular, it makes it possible to minimize, with a high level of safety, the impact of a synchronization on the road behavior of a vehicle, to avoid unwanted accelerations or decelerations, while optimizing driving pleasure.
Les contraintes portant sur le système de contrôle de la boîte de vitesses sont limitées, car l'information redondante FR peut être moins précise et plus lente que l'information principale de position F. Grâce à l'invention, le respect des exigences sécuritaires dans une architecture de boîte de vitesses à synchronisations régulées par le pilotage des moteurs, est assuré sans système complexe.  The constraints on the control system of the gearbox are limited because the redundant information FR can be less precise and slower than the main information of position F. Thanks to the invention, the respect of the security requirements in a synchronized gearbox architecture controlled by the control of the engines, is assured without complex system.

Claims

REVENDICATIONS
1. Procédé de contrôle sécuritaire de la configuration d'un dispositif d'accouplement (8) de boîte de vitesses à baladeur (8c) solidaire en rotation d'un arbre d'entrée de mouvement (4) de celle-ci et mobile axialement sur cet arbre de part et d'autre d'une position neutre intermédiaire entre deux positions opposées d'engagement avec un pignon fou (6a, 7a), caractérisé en ce que : 1. A method for securely controlling the configuration of a coupling device (8) for a sliding gearbox (8c) integral in rotation with a movement input shaft (4) thereof and axially movable on this shaft on either side of a neutral position intermediate between two opposite positions of engagement with an idle gear (6a, 7a), characterized in that:
on définit une configuration neutre du dispositif d'accouplement (8) en fonction d'une information principale de position (F) du baladeur et de sa consigne de déplacement (C) , position dans laquelle la transmission du couple à la roue est effectivement interrompue,  a neutral configuration of the coupling device (8) is defined as a function of a main position information (F) of the player and of its displacement setpoint (C), in which position the transmission of the torque to the wheel is effectively interrupted ,
- la configuration neutre est sécurisée par une information redondante (FR) sur l'état neutre ou non neutre du dispositif d'accouplement (8),  the neutral configuration is secured by redundant information (FR) on the neutral or non-neutral state of the coupling device (8),
- et on autorise le démarrage de la synchronisation du baladeur avec un pignon (6a, 6b), seulement, lorsque le dispositif (8) est dans la configuration neutre.  - And it allows starting the synchronization of the player with a pinion (6a, 6b), only when the device (8) is in the neutral configuration.
2. Procédé de contrôle selon la revendication 1, caractérisé en ce que le dispositif d'accouplement passe par un état d'engagement incertain, lors de l'envoi d'une consigne d'engagement (R, L) , ou lors de l'envoi d'une consigne de neutre (N) , avec une information principale (F) non neutre.  2. Control method according to claim 1, characterized in that the coupling device passes through an uncertain state of engagement, when sending a commitment instruction (R, L), or when sending a neutral setpoint (N), with a non-neutral main information (F).
3. Procédé de contrôle selon la revendication 2, caractérisé en ce que la configuration neutre est déterminée lorsque la consigne (C) est au neutre, et que de l'information de position principale (F) est dans une zone [-a, + ] permettant d'assurer qu'aucun couple n'est transmis.  3. Control method according to claim 2, characterized in that the neutral configuration is determined when the set point (C) is in neutral, and that main position information (F) is in a zone [-a, + ] to ensure that no torque is transmitted.
4. Procédé de contrôle selon l'une des revendications précédentes, caractérisé en ce que le maintien de l'information redondante (FR) sur sa valeur non neutre pendant un temps de confirmation (τ) alors que le dispositif d'accouplement (8) est en configuration neutre, détermine une défaillance de la configuration neutre. 4. Control method according to one of the preceding claims, characterized in that the maintenance of the redundant information (FR) on its non-neutral value during a confirmation time (τ) while the coupling device (8) is in neutral configuration, determines a failure of the neutral configuration.
5. Procédé de contrôle selon la revendication 4 caractérisé en ce que la défaillance de la configuration neutre est aussi détectée par un maintien de l'information de position principale (F) en dehors d'une zone [-a, + ] permettant d'assurer qu'aucun couple n'est transmis. 5. Control method according to claim 4 characterized in that the failure of the neutral configuration is also detected by maintaining the main position information (F) outside a zone [-a, +] allowing ensure that no torque is transmitted.
6. Procédé de contrôle selon l'une des revendication 4 ou 5, caractérisé en ce que la défaillance de la configuration neutre, implique un arrêt de la synchronisation.  6. Control method according to one of claims 4 or 5, characterized in that the failure of the neutral configuration, involves a stop synchronization.
7. Procédé de contrôle selon l'une des revendications 2 à 6, caractérisé en ce qu'on détecte un passage du dispositif d'accouplement (8) d'un état d'engagement incertain à un état engagé (R, L) , si l'information principale de position (F) prend une valeur applicative (δ) assurant l'engagement.  7. Control method according to one of claims 2 to 6, characterized in that a passage of the coupling device (8) is detected from an uncertain state of engagement to a committed state (R, L), if the main position information (F) takes an application value (δ) ensuring the commitment.
8. Procédé de contrôle selon l'une des revendications 2 à 7, caractérisé en ce qu'on détecte un passage du dispositif d'accouplement (8), d'un état engagé (R, L) à un état d'engagement incertain, si l'information principale de position (F) prend une valeur applicative (γ) assurant le non engagement.  8. Control method according to one of claims 2 to 7, characterized in that detects a passage of the coupling device (8), a committed state (R, L) to an uncertain commitment state , if the main position information (F) takes an applicative value (γ) ensuring the non-commitment.
9. Procédé de contrôle selon l'une des revendications précédentes, caractérisé en ce qu'on détecte une défaillance du dispositif d'accouplement (8) si l'information principale de position (F) reste en dehors de la [-a, + ] après un temps de confirmation des états incertains (12) .  9. Control method according to one of the preceding claims, characterized in that detects a failure of the coupling device (8) if the main position information (F) remains outside the [-a, + ] after a time of confirmation of uncertain states (12).
EP17707368.1A 2016-03-10 2017-01-25 Method for checking the configuration safety of a coupling device Withdrawn EP3426952A1 (en)

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