EP3894727A1 - Method and device for the mechanical control of a vehicle in a parking brake release phase - Google Patents

Method and device for the mechanical control of a vehicle in a parking brake release phase

Info

Publication number
EP3894727A1
EP3894727A1 EP19816589.6A EP19816589A EP3894727A1 EP 3894727 A1 EP3894727 A1 EP 3894727A1 EP 19816589 A EP19816589 A EP 19816589A EP 3894727 A1 EP3894727 A1 EP 3894727A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
parking brake
gearbox
kinematic chain
mechanical control
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Withdrawn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
EP19816589.6A
Other languages
German (de)
French (fr)
Inventor
Julie NGUYEN
Patrick GEFFRAY
Christophe Develay
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 EP3894727A1 publication Critical patent/EP3894727A1/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Withdrawn legal-status Critical Current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
    • F16H63/48—Signals to a parking brake or parking lock; Control of parking locks or brakes being part of the transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/18—Propelling the vehicle
    • B60Y2300/20—Reducing vibrations in the driveline
    • B60Y2300/207—Reducing vibrations in the driveline related to drive shaft torsion, e.g. driveline oscillations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/90—Releasing parking brake at start
    • 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
    • F16H59/60—Inputs being a function of ambient conditions
    • F16H59/66—Road conditions, e.g. slope, slippery
    • F16H2059/663—Road slope
    • 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
    • F16H2306/32—Preparing the opening or release of the torque transmitting element

Definitions

  • TITLE METHOD AND DEVICE FOR MECHANICAL CONTROL OF A
  • the present invention relates to the control of vehicle parking brakes.
  • It also relates to a mechanical control device of a vehicle in the release phase of a parking brake comprising a parking wheel capable of immobilizing the vehicle by blocking a rotating element of the kinematic chain connecting the gearbox. vehicle wheel speeds, and a vehicle having such a device.
  • the parking brake systems have the function of locking the wheels of a vehicle when it is stationary. These systems are activated at the driver's request on the gear selector available in the passenger compartment of the vehicle.
  • Park wheel toothed, integral with a part of the gearbox (such as the differential, the secondary shaft ...), a Park finger , secured to the gearbox housing, which pivots in the direction of the parking wheel, to immobilize the latter, and to a system for guiding this finger.
  • the Parker's finger is brought, thanks to the guide system, into a position, which allows it to be inserted into a tooth of the Park wheel. Park's wheel is blocked.
  • the Park wheel being connected to the vehicle by the transmissions, the vehicle is thus immobilized.
  • the forces generated by the weight of the vehicle are transmitted to all of the mechanical elements connecting the vehicle to the Park system, which are then put under stress.
  • the elements of the vehicle entering stress when applying the parking brake include tires and suspensions, drive shafts, differential, secondary shaft, park wheel and park finger.
  • the use of the Automatic Parking Brake if present on the vehicle, can occasionally provide an answer to this problem, by automatically blocking the brake discs before the Park engages, so as to block the constraints generated by the weight of the vehicle on a slope.
  • systematic recourse to the FPA is not possible, first because of the high cost of this function, but also because the FPA cannot be used in certain cold countries, due to the risk of blocking the brake discs.
  • the present invention aims to solve this noise problem, by modifying the mechanical system which enters into resonance, in order to cause a vibratory response of the system under more favorable stress, in the sense that it reduces the noise in the passenger compartment.
  • the mechanical assembly coupled to the kinematic chain comprises a driving source of the vehicle.
  • the proposed mechanical control device comprises a mechanical assembly introducing into the kinematic chain when coupled to these, a mass of inertia making it possible to filter the oscillations of the gearbox which are transmitted to the wheels of the vehicle, during release of the parking brake.
  • the mechanical assembly coupled to the kinematic chain includes a driving source of the vehicle
  • the power source is an electric machine driving a primary shaft of the gearbox
  • the coupling of the electric machine to the kinematic chain is obtained by clutching on a secondary shaft of the gearbox, a pinion driven by the electric machine.
  • FIG. 1 is an architectural diagram illustrating a non-limiting application of the invention on a hybrid vehicle architecture.
  • FIG. 2 reproduces graphs of calculations in different configurations.
  • FIG. 1 there is shown schematically all of the components of the kinematic chain of a hybrid vehicle, put under stress when the parking brake is engaged, and released suddenly when it is released.
  • the GMP Powertrain
  • the gearbox 1 of the hybrid vehicle composed of the gearbox 1 of the hybrid vehicle and its driving sources (heat engine 2, main electric machine 3, secondary electric machine 4).
  • the mass of the vehicle (body and passenger compartment) 4 are connected to the tires 5 of the drive wheels, the first by the transmission shafts 6 connecting the differential 7 of the transmission to the wheels, the second by the wheel suspension arms.
  • the body and the passenger compartment are grouped together in the mass 9.
  • the parking wheel (not shown) is mounted for example on the secondary shaft 10, or on the differential 7.
  • the proposed mechanical control device includes this parking wheel , capable of immobilizing the vehicle by blocking a rotating element of the kinematic chain connecting the gearbox to the wheels.
  • the parking wheel is a notched wheel, which cooperates with a parking finger engaged between its notches to immobilize the vehicle.
  • the parking brake is released when of the parking pin ejection away from the parking wheel.
  • the heat engine 2 and the main electric machine 3 are both located on the primary line of the gearbox.
  • the heat engine is connected to a solid primary shaft 11 and the electric machine to a hollow primary shaft 12 concentric therewith.
  • the solid primary shaft 11 carries two idler gears 13, 14 which descend the movement of the heat engine on the secondary shaft, to establish one or the other two thermal relationships (the second T2 and the fourth T4).
  • the hollow primary shaft carries two fixed teeth or lowering gears 15, 16, descending the movement of the machine
  • the proposed solution consists in coupling with the secondary shaft lOde the box, a mechanical system under stress, before
  • the control device comprises this mechanical assembly, which introduces into the kinematic chain when it is coupled to them, a mass of inertia making it possible to filter the oscillations of the gearbox transmitted to the wheels when the parking brake is released. .
  • Fig. 1 the mechanical assembly which enters into resonance when the parking brake is released, consists of the hollow primary shaft 12, its two down gears 15, 16, and the main electric machine 3. It is different of the initial assembly, because it includes the main electric machine and benefits from its inertia.
  • the mechanical assembly coupled to the kinematic chain comprises a driving source of the vehicle
  • the power source is an electric machine driving a primary shaft of the gearbox
  • FIG. 2 illustrates the behavior of the vehicle through the oscillations of a vehicle wheel. This one was
  • the reproduced curves are obtained by simulation. They illustrate the behavior of the front wheel (left) when the parking brake is released. They highlight resonances of the lower resonance amplitudes, and different frequencies if a gear is engaged when the parking brake is released. Their comparison makes it possible to determine the most favorable situation for reducing vibrations.
  • the instant t 0 corresponds to the ejection of the parking finger, taking into account the response time of the command.
  • the effective release of the parking brake occurs only when the parking finger is ejected away from the parking wheel.
  • the front wheel then starts to move, with displacements (of the order of a few millimeters).
  • the inertia of the gearbox vibrates on the stiffness of the drive shafts.
  • the amplitude of the following is reduced, the train in turn vibrating on the transmissions.
  • the first curve reproduced (A) corresponds to the usual configuration of the gearbox, that is to say when no gear is clutched into it when the parking brake is released.
  • the second curve (B) corresponds to the preliminary engagement of the second electrical report (EV2). It shows
  • the third curve (C) corresponds to the preliminary engagement of the first electric (EV1). It highlights even smaller oscillations. It is therefore the most advantageous situation.
  • a fourth curve (D) corresponds to the addition of an inertia of 2500 grams.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Control Of Transmission Device (AREA)
  • Regulating Braking Force (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Method for the mechanical control of a vehicle in a phase of releasing a parking brake immobilizing the vehicle by blocking an element belonging to the kinematic chain of the vehicle, characterized by coupling the kinematic chain, constrained by the parking brake between the latter and the drive wheels of the vehicle, with a mechanical assembly which introduces into this kinematic chain, prior to the effective release of the parking brake, an inertial mass that serves to filter the oscillations of the gearbox (1) transmitted to the wheels of the vehicle.

Description

DESCRIPTION DESCRIPTION
TITRE : PROCEDE ET DISPOSITIF DE CONTROLE MECANIQUE D'UN TITLE: METHOD AND DEVICE FOR MECHANICAL CONTROL OF A
VEHICULE EN PHASE DE RELACHEMENT DE FREIN DE PARKING VEHICLE IN PARKING BRAKE RELEASE PHASE
La présente invention se rapporte à la commande des freins de parking de véhicule. The present invention relates to the control of vehicle parking brakes.
Plus précisément elle a pour objet un procédé de contrôle mécanique d'un véhicule en phase de relâchement d'un frein de parking immobilisant le véhicule par blocage d'un élément appartenant à la chaîne cinématique du véhicule. More specifically, it relates to a method of mechanical control of a vehicle in the release phase of a parking brake immobilizing the vehicle by blocking an element belonging to the kinematic chain of the vehicle.
Elle a également pour objet un dispositif de contrôle mécanique d'un véhicule en phase de relâchement d'un frein de parking comportant une roue de parking capable d' immobiliser le véhicule par blocage d'un élément tournant de la chaîne cinématique reliant la boîte de vitesses aux roues du véhicule, et un véhicule comportant un tel dispositif. It also relates to a mechanical control device of a vehicle in the release phase of a parking brake comprising a parking wheel capable of immobilizing the vehicle by blocking a rotating element of the kinematic chain connecting the gearbox. vehicle wheel speeds, and a vehicle having such a device.
Les systèmes de frein de parking, ont pour fonction de bloquer les roues d'un véhicule lorsque celui-ci est à l'arrêt. Ces systèmes s'activent à la demande du conducteur sur le sélecteur de vitesses, à sa disposition dans l'habitacle du véhicule. The parking brake systems have the function of locking the wheels of a vehicle when it is stationary. These systems are activated at the driver's request on the gear selector available in the passenger compartment of the vehicle.
Ils sont composés principalement d'une roue de parking, ou « roue de Park », dentée, solidaire d'une partie de la boîte de vitesse (comme le différentiel, l'arbre secondaire...), d'un doigt de Park, solidaire du carter de boîte, qui pivote en direction de la roue de parking, pour immobiliser celle-ci, et d'un système de guidage de ce doigt. Lors de l'enclenchement du Park par le conducteur, le doigt de Park est amené, grâce au système de guidage, dans une position, qui lui permet de venir s'insérer dans une dent de la roue de Park. La roue de Park est bloquée. They are mainly composed of a parking wheel, or "Park wheel", toothed, integral with a part of the gearbox (such as the differential, the secondary shaft ...), a Park finger , secured to the gearbox housing, which pivots in the direction of the parking wheel, to immobilize the latter, and to a system for guiding this finger. When the driver engages the Park, the Parker's finger is brought, thanks to the guide system, into a position, which allows it to be inserted into a tooth of the Park wheel. Park's wheel is blocked.
La roue de Park étant reliée au véhicule par les transmissions, le véhicule est ainsi immobilisé. Lorsque l'immobilisation du véhicule a lieu sur une pente, les efforts générés par le poids du véhicule sont transmis à l'ensemble des éléments mécaniques reliant le véhicule au système Park, qui se mettent alors sous contrainte . The Park wheel being connected to the vehicle by the transmissions, the vehicle is thus immobilized. When the vehicle is immobilized on a slope, the forces generated by the weight of the vehicle are transmitted to all of the mechanical elements connecting the vehicle to the Park system, which are then put under stress.
Lorsque le frein de parking est implanté sur le différentiel de la transmission, les éléments du véhicule entrant en contrainte lors du serrage du frein de parking, comprennent les pneus et les suspensions, les arbres de transmission, le différentiel, l'arbre secondaire, la roue de Park et le doigt de Park. When the parking brake is installed on the transmission differential, the elements of the vehicle entering stress when applying the parking brake, include tires and suspensions, drive shafts, differential, secondary shaft, park wheel and park finger.
Lorsque le conducteur sort du mode Park, avec son levier, ou sélecteur, de commande, par exemple pour passer en mode Drive, des efforts sont appliqués sur le doigt de Park afin de le faire sortir des dents de la roue de parking, pour l'écarter de celle- ci . When the driver leaves Park mode, with his control lever or selector, for example to switch to Drive mode, efforts are applied to Park's finger in order to get it out of the teeth of the parking wheel, for the 'deviate from it.
Lorsque le véhicule est en pente, l'ensemble des éléments mécaniques de la chaîne cinématique, sont sous contrainte, avant le retrait du Park, en raison du poids du véhicule, qui est « vu » par tous ces éléments. Lors du dégagement du frein de Park, les contraintes accumulées dans ces éléments mécaniques se relâchent brusquement et « répondent » mécaniquement. Ils entrent en résonance, à des fréquences variées et avec des amplitudes de mode plus ou moins importantes. Ces fréquences et ces amplitudes dépendent de caractéristiques, telles que la raideur, les inerties, du système mis sous contrainte. When the vehicle is on a slope, all the mechanical elements of the kinematic chain are under stress, before the Park is removed, due to the weight of the vehicle, which is "seen" by all of these elements. When the Park brake is released, the stresses accumulated in these mechanical elements suddenly relax and "respond" mechanically. They enter into resonance, at various frequencies and with more or less significant mode amplitudes. These frequencies and these amplitudes depend on characteristics, such as stiffness, inertias, of the system under stress.
Sur les graphes de vibrations, on distingue généralement une première phase de résonance de la chaîne cinématique sur la raideur des transmissions, et une deuxième phase de résonance du train avant sur la raideur des tampons de suspension. Ces résonances provoquent des vibrations, qui se transmettent à l'ensemble des pièces de la caisse, et à partir de celles-ci, dans l'habitacle. Ces vibrations provoquent un bruit important, au moment du relâchement du doigt de Park, qui est très gênant pour le conducteur et les passagers. Ce phénomène intervient pendant la phase transitoire durant laquelle le véhicule est bloqué par les freins, et le doigt de Park est retiré de la roue dentée On the vibration graphs, there is generally a first phase of resonance of the kinematic chain on the stiffness of the transmissions, and a second phase of resonance of the front axle on the stiffness of the suspension buffers. These resonances cause vibrations, which are transmitted to all parts of the body, and from these, in the passenger compartment. These vibrations cause a significant noise, when the finger of Park is released, which is very annoying for the driver and the passengers. This phenomenon occurs during the transient phase during which the vehicle is blocked by the brakes, and Park's finger is removed from the toothed wheel.
L'utilisation du Frein de Parking Automatique, s'il est présent sur le véhicule, peut apporter ponctuellement une réponse à ce problème, en bloquant automatiquement les disques de frein avant l'engagement du Park, de manière à bloquer les contraintes générées par le poids du véhicule en pente. Toutefois, le recours systématique au FPA, n'est pas envisageable, en premier lieu à cause du coût élevé de cette fonction, mais également car le FPA ne peut pas être utilisé dans certains pays froids, en raison du risque de blocage des disques de frein. The use of the Automatic Parking Brake, if present on the vehicle, can occasionally provide an answer to this problem, by automatically blocking the brake discs before the Park engages, so as to block the constraints generated by the weight of the vehicle on a slope. However, systematic recourse to the FPA is not possible, first because of the high cost of this function, but also because the FPA cannot be used in certain cold countries, due to the risk of blocking the brake discs.
L'implantation de la roue de parking sur l'arbre primaire de la transmission, permet de réduire le phénomène, car le système qui entre en résonnance a une réponse plus favorable. En effet, l'inertie mise en jeu du côté de la boite de vitesses est alors plus importante. Mais le plus souvent, cette implantation n'est pas possible sur les architectures de boîte de vitesses, par manque de place sur la ligne primaire. The installation of the parking wheel on the primary shaft of the transmission makes it possible to reduce the phenomenon, because the system which enters into resonance has a more favorable response. Indeed, the inertia involved on the side of the gearbox is then greater. But more often than not, this installation is not possible on gearbox architectures, due to the lack of space on the primary line.
Avec l'implantation de la roue de parking sur l'arbre secondaire de la transmission, ou encore sur le différentiel, le problème du relâchement brutal de la chaîne cinématique lors du With the installation of the parking wheel on the secondary shaft of the transmission, or even on the differential, the problem of sudden slackening of the kinematic chain during
dégagement du doigt de parking et du bruit généré, reste entier. La présente invention vise à résoudre ce problème de bruit, en modifiant le système mécanique qui entre en résonnance, afin de provoquer une réponse vibratoire du système en contrainte plus favorable, au sens où elle réduit le bruit dans l'habitacle.release of the parking pin and the noise generated, remains intact. The present invention aims to solve this noise problem, by modifying the mechanical system which enters into resonance, in order to cause a vibratory response of the system under more favorable stress, in the sense that it reduces the noise in the passenger compartment.
Dans ce but, elle propose de coupler à la chaîne cinématique mise en contrainte par le frein de parking, entre ce dernier et les roues motrices du véhicule, un ensemble mécanique qui introduit dans celle-ci, avant le relâchement effectif du frein de parking, une masse d'inertie permettant de filtrer les oscillations de la boîte de vitesses transmises aux roues du véhicule . To this end, it proposes to couple to the kinematic chain put under stress by the parking brake, between the latter and the driving wheels of the vehicle, a mechanical assembly which introduces therein, before the effective release of the parking brake, a mass of inertia making it possible to filter the oscillations of the gearbox transmitted to the wheels of the vehicle.
Dans un mode de réalisation particulier de l'invention, l'ensemble mécanique couplé à la chaîne cinématique, comprend une source motrice du véhicule. In a particular embodiment of the invention, the mechanical assembly coupled to the kinematic chain comprises a driving source of the vehicle.
Le dispositif de contrôle mécanique proposé, comporte un ensemble mécanique introduisant dans la chaîne cinématique lorsqu'il est couplé à celles-ci, une masse d'inertie permettant de filtrer les oscillations de la boîte de vitesses qui sont transmises aux roues du véhicule, lors du relâchement du frein de parking. The proposed mechanical control device comprises a mechanical assembly introducing into the kinematic chain when coupled to these, a mass of inertia making it possible to filter the oscillations of the gearbox which are transmitted to the wheels of the vehicle, during release of the parking brake.
Selon d'autres caractéristiques de l'invention : According to other characteristics of the invention:
- l'ensemble mécanique couplé à la chaîne cinématique comprend une source motrice du véhicule, - the mechanical assembly coupled to the kinematic chain includes a driving source of the vehicle,
- la source motrice est une machine électrique entraînant un arbre primaire de la boîte de vitesses - the power source is an electric machine driving a primary shaft of the gearbox
- le couplage de la machine électrique sur la chaîne cinématique est obtenu en crabotant sur un arbre secondaire de la boîte, un pignon entraîné par la machine électrique. - The coupling of the electric machine to the kinematic chain is obtained by clutching on a secondary shaft of the gearbox, a pinion driven by the electric machine.
L' 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 invention will be better understood on reading the following description of a non-limiting embodiment thereof, with reference to the appended drawings, in which:
[Fig. 1] est un schéma d'architecture illustrant une application non limitative de l'invention sur une architecture de véhicule hybride . [Fig. 1] is an architectural diagram illustrating a non-limiting application of the invention on a hybrid vehicle architecture.
[Fig. 2] reproduit des graphiques de calculs dans différentes configurations . [Fig. 2] reproduces graphs of calculations in different configurations.
Sur la [Fig. 1] on a représenté schématiquement l'ensemble des composants de la chaîne cinématique d'un véhicule hybride, mise en contrainte lors de l'engagement du frein de parking, et relâchée brusquement lors du dégagement de celui-ci . In [Fig. 1] there is shown schematically all of the components of the kinematic chain of a hybrid vehicle, put under stress when the parking brake is engaged, and released suddenly when it is released.
D'un côté, on a le GMP (Groupe Motopropulseur) , composé de la boîte de vitesses 1 du véhicule hybride et de ses ces sources motrices (moteur thermique 2, machine électrique principale 3, machine électrique secondaire 4) . De l'autre, la masse du véhicule (caisse et habitacle) 4. Ces deux sous-ensembles sont reliés aux pneus 5 des roues motrices, le premier par les arbres de transmission 6 reliant le différentiel 7 de la transmission aux roues, le second par les bras de suspension des roues. La caisse et l'habitacle sont regroupés dans la masse 9. La roue de parking (non représentée) est montée par exemple sur l'arbre secondaire 10, ou sur le différentiel 7. Le dispositif de contrôle mécanique proposé, comporte cette roue de parking, capable d'immobiliser le véhicule par blocage d'un élément tournant de la chaîne cinématique reliant la boîte de vitesses aux roues. La roue de parking est une roue crantée, qui coopère avec un doigt de parking engagé entre ses crans pour immobiliser le véhicule. Le relâchement du frein de parking intervient lors de l'éjection du doigt de parking à l'écart de la roue de parking . On the one hand, we have the GMP (Powertrain), composed of the gearbox 1 of the hybrid vehicle and its driving sources (heat engine 2, main electric machine 3, secondary electric machine 4). On the other, the mass of the vehicle (body and passenger compartment) 4. These two sub-assemblies are connected to the tires 5 of the drive wheels, the first by the transmission shafts 6 connecting the differential 7 of the transmission to the wheels, the second by the wheel suspension arms. The body and the passenger compartment are grouped together in the mass 9. The parking wheel (not shown) is mounted for example on the secondary shaft 10, or on the differential 7. The proposed mechanical control device includes this parking wheel , capable of immobilizing the vehicle by blocking a rotating element of the kinematic chain connecting the gearbox to the wheels. The parking wheel is a notched wheel, which cooperates with a parking finger engaged between its notches to immobilize the vehicle. The parking brake is released when of the parking pin ejection away from the parking wheel.
Dans ce GMP, le moteur thermique 2 et la machine électrique principale 3 sont implantés tous les deux sur la ligne primaire de la boîte. Le moteur thermique est relié à un arbre primaire plein 11 et la machine électrique à un arbre primaire creux 12 concentrique à celui-ci. L'arbre primaire plein 11 porte deux pignons fous 13, 14 qui descendent le mouvement du moteur thermique sur l'arbre secondaire, pour établir l'un ou l'autre deux rapports thermiques (le deuxième T2 et le quatrième T4) . L'arbre primaire creux porte deux dentures fixes ou pignons de descente 15, 16, descendant le mouvement de la machine In this GMP, the heat engine 2 and the main electric machine 3 are both located on the primary line of the gearbox. The heat engine is connected to a solid primary shaft 11 and the electric machine to a hollow primary shaft 12 concentric therewith. The solid primary shaft 11 carries two idler gears 13, 14 which descend the movement of the heat engine on the secondary shaft, to establish one or the other two thermal relationships (the second T2 and the fourth T4). The hollow primary shaft carries two fixed teeth or lowering gears 15, 16, descending the movement of the machine
électrique principale 3 sur deux pignons fous de l' arbre secondaire 17, 18, pour établir l'un ou l'autre de deux rapports électriques EV1, EV2, grâce au déplacement d'un coupleur 19. La solution proposée consiste à coupler à l'arbre secondaire lOde la boîte, un système mécanique en contrainte, avant le main electrical 3 on two idler gears of the secondary shaft 17, 18, to establish one or the other of two electrical ratios EV1, EV2, by moving a coupler 19. The proposed solution consists in coupling with the secondary shaft lOde the box, a mechanical system under stress, before
dégagement du doigt de parking. Le dispositif de contrôle comporte cet ensemble mécanique, qui introduit dans la chaîne cinématique lorsqu' il est couplé à celles-ci, une masse d' inertie permettant de filtrer les oscillations de la boîte de vitesses transmises aux roues lors du relâchement du frein de parking . parking finger release. The control device comprises this mechanical assembly, which introduces into the kinematic chain when it is coupled to them, a mass of inertia making it possible to filter the oscillations of the gearbox transmitted to the wheels when the parking brake is released. .
Dans l'exemple de réalisation non limitatif illustré par la In the nonlimiting exemplary embodiment illustrated by the
[Fig. 1], l'ensemble mécanique qui entre en résonnance lors du relâchement du frein de parking, est constitué de l'arbre primaire creux 12, de ses deux pignons de descente 15, 16, et de la machine électrique principale 3. Il est différent de l'ensemble initial, car il inclut la machine électrique principale et bénéficie de l'inertie de celle-ci. En résumé :[Fig. 1], the mechanical assembly which enters into resonance when the parking brake is released, consists of the hollow primary shaft 12, its two down gears 15, 16, and the main electric machine 3. It is different of the initial assembly, because it includes the main electric machine and benefits from its inertia. In summary :
- l'ensemble mécanique couplé à la chaîne cinématique comprend une source motrice du véhicule, the mechanical assembly coupled to the kinematic chain comprises a driving source of the vehicle,
- la source motrice est une machine électrique entraînant un arbre primaire de la boîte de vitesses, - the power source is an electric machine driving a primary shaft of the gearbox,
- le couplage de la machine électrique sur la chaîne cinématique est obtenu en crabotant sur un arbre secondaire de la boîte de vitesses, un pignon entraîné par la machine électrique. - the coupling of the electric machine to the kinematic chain is obtained by clutching a pinion driven by the electric machine on a secondary shaft of the gearbox.
[Fig. 2] illustre le comportement du véhicule au travers des oscillations d'une roue de véhicule. Celui-ci a été [Fig. 2] illustrates the behavior of the vehicle through the oscillations of a vehicle wheel. This one was
préalablement garé en pente vers l'avant, et immobilisé en serrant le frein de parking. Les courbes reproduites sont obtenues par simulation. Elles illustrent le comportement de la roue avant (gauche), lors d'un relâchement du frein de parking. Elles mettent en évidence des résonnances des amplitudes de résonnance moins importantes, et des fréquences différentes si un rapport est engagé lors du relâchement du frein de parking. Leur comparaison permet de déterminer la situation la plus favorable pour réduire les vibrations. previously parked on a slope forwards, and immobilized by applying the parking brake. The reproduced curves are obtained by simulation. They illustrate the behavior of the front wheel (left) when the parking brake is released. They highlight resonances of the lower resonance amplitudes, and different frequencies if a gear is engaged when the parking brake is released. Their comparison makes it possible to determine the most favorable situation for reducing vibrations.
Sur le schéma l'instant t0 correspond à l'éjection du doigt de parking, en tenant compte du temps de réponse de la commande. Le relâchement effectif du frein de parking intervient seulement lorsque le doigt de parking est éjecté à l'écart de la roue de parking. La roue avant entre ensuite en mouvement, avec des déplacements (de l'ordre de quelques millimètres) . Pendant les premières oscillations (environ un dixième de seconde) , qui sont les plus importantes, l'inertie de la boîte de vitesses vibre sur la raideur des arbres de transmission. L'amplitude des suivantes se réduit, le train venant à son tour vibrer sur les transmissions . In the diagram the instant t 0 corresponds to the ejection of the parking finger, taking into account the response time of the command. The effective release of the parking brake occurs only when the parking finger is ejected away from the parking wheel. The front wheel then starts to move, with displacements (of the order of a few millimeters). During the first oscillations (about one tenth of a second), which are the most important, the inertia of the gearbox vibrates on the stiffness of the drive shafts. The amplitude of the following is reduced, the train in turn vibrating on the transmissions.
La première courbe reproduite (A) correspond à la configuration habituelle de la boîte, c'est-à-dire lorsque aucun rapport n'est craboté dans celle-ci lors du relâchement du frein de parking. The first curve reproduced (A) corresponds to the usual configuration of the gearbox, that is to say when no gear is clutched into it when the parking brake is released.
La deuxième courbe (B), correspond à l'engagement préliminaire du deuxième rapport électrique (EV2) . Elle montre des The second curve (B) corresponds to the preliminary engagement of the second electrical report (EV2). It shows
oscillations réduites par rapport à la première. La troisième courbe (C) , correspond à l'engagement préliminaire du premier électrique (EV1) . Elle met en évidence des oscillations encore moindres. C'est donc la situation la plus avantageuse. A titre de comparaison, une quatrième courbe (D) correspond à l'ajout d'une inertie de 2500 grammes. L' avantage de la solution proposé est qu'elle n'introduit aucun coût supplémentaire dans la transmission, puisqu'il s'agit seulement d'une modification dans le logiciel de contrôle véhicule {soft) . Cette modification doit simplement permettre de venir craboter dans cet exemple le premier rapport électrique, avant le dégagement du Park. Le crabotage et le couplage de la machine électrique, n'a pas de fonction de blocage du véhicule (pas de fonction Park) . Il sert simplement à réduire les résonnances et les réponses mécaniques des éléments en reduced oscillations compared to the first. The third curve (C) corresponds to the preliminary engagement of the first electric (EV1). It highlights even smaller oscillations. It is therefore the most advantageous situation. For comparison, a fourth curve (D) corresponds to the addition of an inertia of 2500 grams. The advantage of the proposed solution is that it does not introduce any additional cost in the transmission, since it is only a modification in the vehicle control software (soft). This modification should simply allow the first electrical report to be clutched in this example, before the Park is released. The dog clutch and the coupling of the electric machine, has no vehicle blocking function (no Park function). It simply serves to reduce the resonances and mechanical responses of the elements in
contrainte, et peut intervenir peu de temps, voire immédiatement avant le désengagement du Park. constraint, and can intervene shortly, or even immediately before the Park disengagement.

Claims

REVENDICATIONS
1. Procédé de contrôle mécanique d'un véhicule en phase de relâchement d'un frein de parking immobilisant le véhicule par blocage d'un élément appartenant à chaîne cinématique du véhicule, caractérisé en ce qu'on couple à la chaîne cinématique mise en contrainte par le frein de parking entre ce dernier et les roues motrices du véhicule, un ensemble mécanique qui introduit dans celle-ci, une masse d'inertie permettant de filtrer les oscillations de la boîte de vitesses (1) transmises aux roues du véhicule, caractérisé en ce qu'on couple à l'arbre secondaire (10) de la boîte, avant le relâchement effectif du frein de parking, un système mécanique en contrainte, 1. Method for mechanically controlling a vehicle in the release phase of a parking brake immobilizing the vehicle by blocking an element belonging to the vehicle kinematic chain, characterized in that the kinematic chain is stressed by the parking brake between the latter and the driving wheels of the vehicle, a mechanical assembly which introduces into it a mass of inertia making it possible to filter the oscillations of the gearbox (1) transmitted to the wheels of the vehicle, characterized in that one couples to the secondary shaft (10) of the box, before the effective release of the parking brake, a mechanical system under stress,
introduisant dans la chaîne cinématique une masse d'inertie permettant de filtrer les oscillations de la boîte de vitesses transmises aux roues lors du relâchement du frein de parking.introducing a mass of inertia into the kinematic chain making it possible to filter the oscillations of the gearbox transmitted to the wheels when the parking brake is released.
2. Procédé de contrôle mécanique selon la revendication 1, caractérisé en ce que l'ensemble mécanique couplé à la chaîne cinématique comprend une source motrice (3) du véhicule. 2. Mechanical control method according to claim 1, characterized in that the mechanical assembly coupled to the kinematic chain comprises a driving source (3) of the vehicle.
3. Procédé de contrôle mécanique selon la revendication 2, caractérisé en ce que la source motrice (3) est une machine électrique entraînant un arbre primaire (12) de la boîte de vitesses (1) . 3. A mechanical control method according to claim 2, characterized in that the driving source (3) is an electric machine driving a primary shaft (12) of the gearbox (1).
4. Procédé de contrôle mécanique selon la revendication 3, caractérisé en ce que le couplage de la machine électrique (3) sur la chaîne cinématique est obtenu en crabotant sur un arbre secondaire (10) de la boîte de vitesses, un pignon (17, 18) entraîné par la machine électrique (3) . 4. Mechanical control method according to claim 3, characterized in that the coupling of the electric machine (3) on the kinematic chain is obtained by clutching on a secondary shaft (10) of the gearbox, a pinion (17, 18) driven by the electric machine (3).
5. Procédé de contrôle mécanique selon l'une des 5. Mechanical control method according to one of the
revendications précédentes, caractérisé en ce que le couplage de l'ensemble mécanique à la chaîne cinématique intervient previous claims, characterized in that the coupling of the mechanical assembly to the kinematic chain takes place
immédiatement avant le relâchement effectif du frein de parking.immediately before the effective release of the parking brake.
6. Dispositif de contrôle mécanique d'un véhicule en phase de relâchement d'un frein de parking comportant une roue de parking capable d'immobiliser le véhicule par blocage d'un élément tournant de la chaîne cinématique reliant la boîte de vitesses aux roues du véhicule, caractérisé en ce qu'il comporte un ensemble mécanique introduisant dans la chaîne cinématique, lorsqu'il est couplé à celles-ci, une masse d'inertie permettant de filtrer les oscillations de la boîte de vitesses (1) transmises aux roues du véhicule lors du relâchement du frein de parking . 6. Mechanical control device for a vehicle in the release phase of a parking brake comprising a parking wheel capable of immobilizing the vehicle by blocking a rotating element of the kinematic chain connecting the gearbox to the wheels of the vehicle, characterized in that it comprises a mechanical assembly introducing into the kinematic chain, when coupled to these, a mass of inertia making it possible to filter the oscillations of the gearbox (1) transmitted to the wheels of the vehicle when the parking brake is released.
7. Dispositif de contrôle mécanique selon la revendication 6, caractérisé en ce que l'ensemble mécanique est couplé à la chaîne cinématique avant le relâchement effectif du frein de parking . 7. Mechanical control device according to claim 6, characterized in that the mechanical assembly is coupled to the kinematic chain before the effective release of the parking brake.
8. Dispositif de contrôle mécanique selon la revendication 7, caractérisé en ce que le relâchement du frein de parking intervient lors de l'éjection d'un doigt de parking à l'écart de la roue de parking. 8. Mechanical control device according to claim 7, characterized in that the release of the parking brake occurs during the ejection of a parking finger away from the parking wheel.
9. Dispositif de contrôle mécanique selon la revendication 6, 9. Mechanical control device according to claim 6,
7 ou 8, caractérisé en ce que la roue de parking est montée sur le différentiel (7) de la boîte de vitesses (1) . 7 or 8, characterized in that the parking wheel is mounted on the differential (7) of the gearbox (1).
10. Véhicule hybride comportant un moteur thermique (2) et une machine électrique principale (3) implantés tous les deux sur la ligne primaire de la boîte de vitesses, reliés respectivement à un arbre primaire plein (11) et à un arbre primaire creux (21) concentriques, dont les mouvements descendent sur un arbre secondaire (10) de la boîte de vitesses vers un différentiel (7) relié aux roues motrices du véhicule par des arbres de 10. Hybrid vehicle comprising a heat engine (2) and a main electric machine (3) both located on the primary line of the gearbox, connected respectively to a solid primary shaft (11) and to a hollow primary shaft ( 21) concentric, the movements of which descend on a secondary shaft (10) of the gearbox towards a differential (7) connected to the drive wheels of the vehicle by shafts of
transmission (6), caractérisé en ce qu'il comporte un dispositif de contrôle mécanique conforme à l'une des revendications 6 à 9. transmission (6), characterized in that it comprises a mechanical control device according to one of claims 6 to 9.
EP19816589.6A 2018-12-14 2019-12-02 Method and device for the mechanical control of a vehicle in a parking brake release phase Withdrawn EP3894727A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1872954A FR3090062B1 (en) 2018-12-14 2018-12-14 METHOD AND DEVICE FOR MECHANICAL CONTROL OF A VEHICLE IN THE PARKING BRAKE RELEASE PHASE
PCT/EP2019/083327 WO2020120201A1 (en) 2018-12-14 2019-12-02 Method and device for the mechanical control of a vehicle in a parking brake release phase

Publications (1)

Publication Number Publication Date
EP3894727A1 true EP3894727A1 (en) 2021-10-20

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ID=66286489

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Application Number Title Priority Date Filing Date
EP19816589.6A Withdrawn EP3894727A1 (en) 2018-12-14 2019-12-02 Method and device for the mechanical control of a vehicle in a parking brake release phase

Country Status (7)

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EP (1) EP3894727A1 (en)
JP (1) JP2022512387A (en)
KR (1) KR20210094651A (en)
CN (1) CN113227615A (en)
BR (1) BR112021011199A2 (en)
FR (1) FR3090062B1 (en)
WO (1) WO2020120201A1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2888908B1 (en) * 2005-07-21 2008-08-08 Renault Sas DEVICE FOR LOCKING A VEHICLE TRANSMISSION
GB2494196B (en) * 2011-09-05 2013-12-11 Land Rover Uk Ltd Transmission having a park pawl which is engaged after a predetermined delay
FR2990737B1 (en) * 2012-05-16 2015-08-07 Peugeot Citroen Automobiles Sa METHOD AND DEVICE FOR MONITORING A SPEED PRESELECTION MECHANISM OF A VEHICLE GEARBOX, FOR LIMITING THE AMPLIFICATION OF UNDESIRABLE FREQUENCIES
DE102013206176A1 (en) * 2013-04-09 2014-10-09 Magna Powertrain Ag & Co. Kg vehicle drive
FR3014061B1 (en) * 2013-12-02 2015-12-11 Renault Sas METHOD FOR CONTROLLING THE STARTING OF THE THERMAL MOTOR OF A HYBRID MOTOR POWERTRAIN
JP6493517B2 (en) * 2015-04-14 2019-04-10 日産自動車株式会社 Electric vehicle start control device
JP6393718B2 (en) * 2016-09-13 2018-09-19 本田技研工業株式会社 Control device for hybrid vehicle
DE102017110594A1 (en) * 2017-05-16 2018-11-22 Schaeffler Technologies AG & Co. KG Method for actuating a parking brake

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CN113227615A (en) 2021-08-06
FR3090062B1 (en) 2022-09-02
BR112021011199A2 (en) 2021-08-31
WO2020120201A1 (en) 2020-06-18
JP2022512387A (en) 2022-02-03
KR20210094651A (en) 2021-07-29
FR3090062A1 (en) 2020-06-19

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