FR2703007A1 - Hydraulic control assembly, especially for a friction clutch of a motor vehicle - Google Patents

Hydraulic control assembly, especially for a friction clutch of a motor vehicle Download PDF

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Publication number
FR2703007A1
FR2703007A1 FR9403410A FR9403410A FR2703007A1 FR 2703007 A1 FR2703007 A1 FR 2703007A1 FR 9403410 A FR9403410 A FR 9403410A FR 9403410 A FR9403410 A FR 9403410A FR 2703007 A1 FR2703007 A1 FR 2703007A1
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FR
France
Prior art keywords
control
valve
hydraulic
cylinder
receiving cylinder
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.)
Granted
Application number
FR9403410A
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French (fr)
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FR2703007B1 (en
Inventor
Frey Peter
Nagler Frenz
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ZF Sachs AG
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Fichtel and Sachs AG
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Publication of FR2703007A1 publication Critical patent/FR2703007A1/en
Application granted granted Critical
Publication of FR2703007B1 publication Critical patent/FR2703007B1/en
Anticipated expiration legal-status Critical
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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
    • F16H63/46—Signals to a clutch outside the gearbox
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
    • B60K23/02—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for main transmission clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D29/00—Clutches and systems of clutches involving both fluid and magnetic actuation
    • F16D29/005—Clutches and systems of clutches involving both fluid and magnetic actuation with a fluid pressure piston driven by an electric 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • 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
    • F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
    • 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
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0203—Control by fluid pressure with an accumulator; Details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0212—Details of pistons for master or slave cylinders especially adapted for fluid control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0227—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
    • F16D2048/0233—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation
    • F16D2048/0245—Electrically driven rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0278—Two valves in series arrangement for controlling supply to actuation cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0281—Complex circuits with more than two valves in series or special arrangements thereof not provided for in previous groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/302—Signal inputs from the actuator
    • F16D2500/3026—Stroke
    • 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
    • F16H2061/2823—Controlling actuator force way characteristic, i.e. controlling force or movement depending on the actuator position, e.g. for adapting force to synchronisation and engagement of gear clutch
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • 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
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • F16H2061/305—Accumulators for fluid supply to the servo motors, or control thereof
    • 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
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • F16H2061/308—Modular hydraulic shift units, i.e. preassembled actuator units for select and shift movements adapted for being mounted on transmission casing
    • 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
    • F16H61/0021—Generation or control of line pressure
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

Hydraulic control assembly, especially for a friction clutch for a motor vehicle, in which the electric motor, the hydraulic pump, the hydraulic pressure accumulator, the control valve and the control cylinder are grouped together into a control module. Moreover, inside the control module 9 is provided at least one other control valve 11a or 11b which is connected to the hydraulic pressure accumulator 6 and feeds at least one receiver cylinder 12a or 12b intended to control a gearbox. That makes it possible to produce a compact hydraulic control assembly which can be used for automatic control not only of a clutch but also of a gearbox.

Description

L'invention se rapporte à un ensemble de commande hydraulique, notamment pour un embrayage à friction d'un véhicule automobile, composé d'un moteur électrique, d'une pompe hydraulique entraînée par le moteur électrique, d'un accumulateur de pression hydraulique alimenté par la pompe hydraulique, et d'un vérin de commande relié à l'accumulateur de pression hydraulique; par l'intermédiaire d'une vanne de commande, notamment une vanne proportionnelle ou une vanne de commutation séquentielle. The invention relates to a hydraulic control assembly, in particular for a friction clutch of a motor vehicle, composed of an electric motor, a hydraulic pump driven by the electric motor, a hydraulic pressure accumulator supplied by the hydraulic pump, and a control cylinder connected to the hydraulic pressure accumulator; via a control valve, in particular a proportional valve or a sequential switching valve.

Selon la demande de brevet allemande n P 42 37 853, le moteur électrique, la pompe hydraulique, l'accumulateur de pression hydraulique, la vanne de commande et le vérin de commande sont regroupés en un module de commande qui renferme des canaux pour relier l'accumulateur de pression hydraulique à la pompe hydraulique et à la vanne de commande, ainsi que pour relier la vanne de commande au vérin de commande. According to German patent application No. P 42 37 853, the electric motor, the hydraulic pump, the hydraulic pressure accumulator, the control valve and the control cylinder are grouped together in a control module which contains channels for connecting the hydraulic pressure accumulator to the hydraulic pump and to the control valve, as well as to connect the control valve to the control cylinder.

Un tel module de commande forme une unité pouvant déjà fonctionner en soi, de sorte que le module de commande peut être contrôlé quant à son fonctionnement, déjà avant d'être monté dans le véhicule automobile. Le module forme un ensemble de construction compacte, qui peut être monté sans problème, même dans le cas d'un emplacement restreint, en un endroit plus ou moins quelconque du véhicule automobile. Such a control module forms a unit which can already operate in itself, so that the control module can be checked as to its operation, already before being mounted in the motor vehicle. The module forms a compact construction, which can be mounted without problem, even in the case of a limited location, in a more or less arbitrary location of the motor vehicle.

Le but de l'invention consiste à fournir un ensemble de commande hydraulique d'un montage simple, pour un embrayage à friction, qui permet en outre de réaliser la commande d'une boite de vitesses.  The object of the invention is to provide a hydraulic control assembly of a simple assembly, for a friction clutch, which also makes it possible to control a gearbox.

Conformément à l'invention, ce but est atteint grâce au fait que dans le module de commande est prévue au moins une autre vanne de commande qui est reliée à l'accumulateur de pression hydraulique, et alimente au moins un vérin récepteur destiné à commander une boite de vitesses d'un véhicule automobile. According to the invention, this object is achieved thanks to the fact that in the control module is provided at least one other control valve which is connected to the hydraulic pressure accumulator, and feeds at least one receiving cylinder intended to control a gearbox of a motor vehicle.

L'avantage de ceci réside dans le fait qu'il est possible de réaliser à l'aide de moyens simples, un actionnement d'un embrayage et d'une boite de vitesses, en permettant ainsi de commander de manière automatisée un embrayage sec usuel et une boite de vitesses à changement de rapport, classique. Un tel ensemble de commande peut être conçu de manière à pouvoir être mis en oeuvre dans des véhicules de types les plus divers, l'adaptation à différentes versions d'embrayage et différentes versions de boite de vitesses, s'effectuant par l'intermédiaire des vérins récepteurs de l'embrayage et de la boite de vitesses. The advantage of this lies in the fact that it is possible, using simple means, to actuate a clutch and a gearbox, thereby making it possible to automatically control a conventional dry clutch. and a conventional gearbox. Such a control assembly can be designed so that it can be implemented in vehicles of the most diverse types, the adaptation to different versions of clutch and different versions of gearbox, being effected by means of clutch and gearbox receiving cylinders.

Selon une autre caractéristique essentielle, on prévoit en guise de vanne de commande, au moins une vanne proportionnelle, ou bien au moins une vanne de commutation séquentielle, ou au moins une vanne de régulation de pression. According to another essential characteristic, there is provided as a control valve, at least one proportional valve, or at least one sequential switching valve, or at least one pressure regulation valve.

Selon une autre configuration de l'invention, la vanne de commande est reliée, par l'intermédiaire d'une liaison hydraulique, à un vérin récepteur destiné à la commande de la sélection d'indexage d'un rapport et/ou de l'enclenchement d'un rapport dans une boite de vitesses. According to another configuration of the invention, the control valve is connected, via a hydraulic connection, to a receiving cylinder intended for controlling the indexing selection of a report and / or the engagement of a gear in a gearbox.

Selon un autre mode de réalisation, pour la commande de la sélection d'indexage d'un rapport, et/ou pour la commande de l'enclenchement d'un rapport, sont prévus pour chacune de ces fonctions, une vanne de commande et un vérin récepteur. L'avantage de cela réside dans le fait que, par l'intermédiaire de ces vannes de commande, les vérins récepteurs sur la boite de vitesses sont commandés et sollicités hydrauliquement pour la sélection de l'indexage d'un rapport et l'enclenchement des rapports. According to another embodiment, for each of these functions, for controlling the indexing selection of a report, and / or for controlling the engagement of a report, a control valve and a receiving cylinder. The advantage of this lies in the fact that, via these control valves, the receiving cylinders on the gearbox are controlled and hydraulically stressed for the selection of the indexing of a report and the engagement of the reports.

Pour le positionnement des vérins récepteurs, sont prévus des capteurs; ainsi, des capteurs de déplacement linéaire permettent de réaliser une détection de la position du piston du vérin récepteur, et sa régulation de position. L'alimentation hydraulique et les vannes de commande constituent ainsi une unité susceptible d'être contrôlée. Sensors are provided for positioning the receiving cylinders; linear displacement sensors thus make it possible to detect the position of the piston of the receiving cylinder, and its position regulation. The hydraulic supply and the control valves thus constitute a unit capable of being controlled.

Selon une configuration de l'invention, dans le cas de l'utilisation d'une vanne de régulation de pression en guise de vanne de commande, le vérin récepteur peut être sollicité par une pression de fonctionnement variable en fonction de la situation de marche ou de l'état de fonctionnement. Grâce à ce mode de réalisation, il est possible, dans le cas de l'utilisation de la vanne de régulation de pression pour l'enclenchement d'un rapport, de définir à l'avance une pression de consigne appropriée et ainsi une force de commande correspondante, en étant susceptible d'être modifiée en fonction de la situation de marche ou de l'étant de fonctionnement. According to a configuration of the invention, in the case of the use of a pressure regulating valve as a control valve, the receiving cylinder can be requested by a variable operating pressure depending on the operating situation or operating status. Thanks to this embodiment, it is possible, in the case of using the pressure regulating valve to engage a gear, to define in advance an appropriate set pressure and thus a force of corresponding command, being capable of being modified according to the operating situation or the operating condition.

Selon un mode de réalisation avantageux, dans le cas de l'utilisation d'une vanne de régulation de pression et d'un capteur de déplacement, le vérin récepteur est-sollicité, en fonction de la situation, par une commande de pression ou une régulation de position.  According to an advantageous embodiment, in the case of the use of a pressure regulating valve and a displacement sensor, the receiving cylinder is biased, depending on the situation, by a pressure control or a position regulation.

Dans la suite, l'invention va être décrite plus en détail, au regard d'exemples de réalisation préférés, représentés sur les dessins annexés, qui montrent:
Fig. 1 une représentation schématique d'un système
d'actionnement hydraulique d'embrayage pour un
embrayage à friction de véhicule automobile,
comprenant un ensemble de commande hydraulique
et d'autres vannes de commande pour la
commande automatique d'une boite de vitesses,
des distributeurs proportionnels étant
utilisés dans ce cas;
Fig. 2 une autre représentation schématique d'un
ensemble de commande, représenté dans son
principe, de manière identique à la figure 1,
comportant toutefois des vannes de commutation
séquentielles;
Fig. 3 un autre ensemble de commande représenté de
manière schématique, et comportant une vanne
de régulation de pression pour le vérin
récepteur de l'enclenchement d'un rapport.In the following, the invention will be described in more detail, with reference to preferred embodiments, represented in the appended drawings, which show:
Fig. 1 a schematic representation of a system
hydraulic clutch actuation for a
motor vehicle friction clutch,
including a hydraulic control assembly
and other control valves for the
automatic transmission control,
proportional distributors being
used in this case;
Fig. 2 another schematic representation of a
control assembly, shown in its
principle, identically to figure 1,
comprising however switching valves
sequential;
Fig. 3 another control assembly shown from
schematically, and comprising a valve
pressure regulator for the cylinder
gear engagement receiver.

La figure 1 montre de manière schématique, un embrayage à friction 1 disposé entre le moteur et la transmission d'un véhicule automobile, et dont le mécanisme de débrayage 3 est actionné par un vérin récepteur hydraulique 5, dans la direction de l'ouverture de l'embrayage. Le vérin récepteur 5 est relié, par l'intermédiaire d'une conduite hydraulique 7, à une chambre primaire 15 d'un vérin hydraulique de commande 8, dont la chambre de vérin 16 est divisée par un piston 17, en une chambre travail 18 et la chambre primaire 15. La pression dans la chambre primaire 15 et ainsi dans le vérin récepteur 5, est déterminée par la pression dans la chambre de travail 18.En faisant varier la pression dans la chambre de travail 18, il est possible de faire varier la position du mécanisme de débrayage 3 de l'embrayage 1, entre une position ouvrant complètement l'embrayage 1, et une position fermant complètement celui-ci. FIG. 1 schematically shows a friction clutch 1 arranged between the engine and the transmission of a motor vehicle, and the declutching mechanism 3 of which is actuated by a hydraulic receiving cylinder 5, in the direction of the opening of the clutch. The receiving cylinder 5 is connected, by means of a hydraulic line 7, to a primary chamber 15 of a hydraulic control cylinder 8, the cylinder chamber 16 of which is divided by a piston 17, into a working chamber 18 and the primary chamber 15. The pressure in the primary chamber 15 and thus in the receiving cylinder 5 is determined by the pressure in the working chamber 18. By varying the pressure in the working chamber 18, it is possible to make vary the position of the clutch release mechanism 3 of the clutch 1, between a position fully opening the clutch 1, and a position completely closing the latter.

L'embrayage 1 est ouvert et fermé de manière automatique et connue en soi, par l'intermédiaire d'une commande électronique 19, conformément à la situation de marche du véhicule automobile, aussi bien lors du démarrage que lors du changement des rapports d'une boite de vitesses non représentée, du véhicule automobile. La commande 19 réagit dans ce cas, à un signal d'un capteur de déplacement 21, représentant la position instantanée d'une tige de piston 20 du piston 17, et donc la position instantanée du mécanisme de débrayage 3 de l'embrayage 1, et commande, par l'intermédiaire d'une vanne proportionnelle 26, de manière proportionnelle au volume pour la position souhaitée du mécanisme d'embrayage 3, la pression dans la chambre de travail 18 du vérin de commande 8. La soupape de commande 26 est sollicitée par un organe d'actionnement électromagnétique 22, et établit, soit un retour vers le réservoir 23 ou une alimentation du vérin de commande 8 à partir de la pompe hydraulique 4, voire de l'accumulateur de pression hydraulique 6. La pompe hydraulique 4 est ici entraînée par un moteur électrique 2. The clutch 1 is opened and closed automatically and known per se, by means of an electronic control 19, in accordance with the operating situation of the motor vehicle, both during starting and when changing the gear ratios. a gearbox, not shown, of the motor vehicle. The control 19 reacts in this case, to a signal from a displacement sensor 21, representing the instantaneous position of a piston rod 20 of the piston 17, and therefore the instantaneous position of the declutching mechanism 3 of the clutch 1, and control, via a proportional valve 26, proportional to the volume for the desired position of the clutch mechanism 3, the pressure in the working chamber 18 of the control cylinder 8. The control valve 26 is solicited by an electromagnetic actuator 22, and establishes either a return to the reservoir 23 or a supply to the control cylinder 8 from the hydraulic pump 4, or even from the hydraulic pressure accumulator 6. The hydraulic pump 4 is here driven by an electric motor 2.

La conduite d'alimentation 24 alimente simultanément -les -vérins récepteurs 12a et 12b, par l'intermédiaire des vannes de commande lla et llb. Les vannes de commande lla et llb font ici partie intégrante du module de commande 9, tandis que les vérins récepteurs 12a et 12b sont disposés sur la boite de vitesses d'un véhicule automobile, le vérin récepteur 12a déterminant la sélection d'indexage d'un rapport de la boite de vitesses, par l'intermédiaire de son piston mobile axialement, tandis que le vérin récepteur 12b est également monté sur la boite de vitesses d'un véhicule automobile et effectue l'enclenchement du rapport, par l'intermédiaire de son piston mobile axialement. A chaque vérin récepteur 12a et 12b est associé un capteur 14, qui détecte la position instantanée du piston des vérins récepteurs 12 (12a, 12b).Les vannes de commande lla et llb sont commandées chacune par un organe d'actionnement électromagnétique 10, de sorte que la liaison hydraulique 13 à la pompe hydraulique, voire à l'accumulateur de pression hydraulique 6, est ouverte ou fermée. Le piston du vérin récepteur 12 peut, à cette occasion, être déplacé dans l'une ou l'autre direction, en fonction de la position de la vanne de commande 11 (lla, llb). The supply line 24 simultaneously supplies the receiver cylinders 12a and 12b, via the control valves 11a and 11b. The control valves 11a and 11b here form an integral part of the control module 9, while the receiving cylinders 12a and 12b are arranged on the gearbox of a motor vehicle, the receiving cylinder 12a determining the indexing selection of a gearbox ratio, via its axially movable piston, while the receiving cylinder 12b is also mounted on the gearbox of a motor vehicle and engages the gear, via its piston movable axially. Each receiver cylinder 12a and 12b is associated with a sensor 14 which detects the instantaneous position of the piston of the receiver cylinders 12 (12a, 12b). The control valves 11a and 11b are each controlled by an electromagnetic actuator 10, so that the hydraulic connection 13 to the hydraulic pump, or even to the hydraulic pressure accumulator 6, is open or closed. The piston of the receiving cylinder 12 can, on this occasion, be moved in one or the other direction, depending on the position of the control valve 11 (11a, 11b).

Sur la figure 2 est représenté un autre mode de réalisation d'un module de commande 9, qui, quant au principe, correspond au mode de réalisation selon la figure 1, avec toutefois comme différence, le fait que les vannes de commande 11 se présentent sous la forme de vannes de commutation séquentielles. Les vérins récepteurs 12 sont ici encore alimentés par la liaison hydraulique 13, une liaison hydraulique 13 s'effectuant, pour chaque vérin récepteur 12, à la chambre de travail inférieure et une autre à la chambre de travail supérieure du vérin récepteur 12. Chaque liaison hydraulique individuelle 13 est dans ce cas alimentée par une vanne de commande 11, de sorte que le piston dans le vérin récepteur 12, peut être déplacé axialement, par l'une des liaisons hydrauliques 13, dans l'une des directions, et par l'autre liaison hydraulique 13, dans l'autre direction.La position instantanée de la tige de piston du vérin récepteur 12, reliée au piston de celui-ci, est détectée en relevant son déplacement, par un capteur. FIG. 2 shows another embodiment of a control module 9, which, in principle, corresponds to the embodiment according to FIG. 1, with the difference, however, that the control valves 11 are presented in the form of sequential switching valves. The receiving cylinders 12 are again here supplied by the hydraulic connection 13, a hydraulic connection 13 being effected, for each receiving cylinder 12, at the lower working chamber and another at the upper working chamber of the receiving cylinder 12. Each connection individual hydraulics 13 is in this case supplied by a control valve 11, so that the piston in the receiving cylinder 12 can be moved axially, by one of the hydraulic connections 13, in one of the directions, and by l Another hydraulic connection 13, in the other direction. The instantaneous position of the piston rod of the receiving cylinder 12, connected to the piston of the latter, is detected by recording its displacement, by a sensor.

Sur la figure 3 est représenté un autre mode de réalisation d'un module de commande 9, selon lequel le vérin récepteur 12a est relié à l'alimentation par l'intermédiaire d'une seule liaison hydraulique 13 et d'une vanne de commande lla. La vanne de commande lia permet au fluide hydraulique de s'écouler dans la chambre de travail inférieure du vérin récepteur 12a, par l'intermédiaire de la liaison hydraulique 13, de sorte que le piston se déplace en direction de l'extraction de sa tige de piston, puis, lors de l'inversion de la vanne de commande lia, le piston est repoussé dans sa position initiale, par le ressort 25. In Figure 3 is shown another embodiment of a control module 9, according to which the receiving cylinder 12a is connected to the supply via a single hydraulic connection 13 and a control valve lla . The control valve 11a allows the hydraulic fluid to flow into the lower working chamber of the receiving cylinder 12a, via the hydraulic connection 13, so that the piston moves in the direction of the extraction of its rod piston, then, when the control valve 11a is inverted, the piston is pushed back into its initial position by the spring 25.

Le vérin récepteur 12b est alimenté par l'intermédiaire de vannes de commande llb, réalisées sous forme de vannes de régulation de pression, de sorte que le vérin récepteur 12b peut être régulé ou commandé en pression, sa position étant déterminée par des capteurs de déplacement.  The receiving cylinder 12b is supplied via control valves llb, produced in the form of pressure regulating valves, so that the receiving cylinder 12b can be regulated or controlled by pressure, its position being determined by displacement sensors. .

Claims (8)

REVENDICATIONS.CLAIMS. 1. Ensemble de commande hydraulique, notamment pour un embrayage à friction d'un véhicule automobile, composé d'un moteur électrique, d'une pompe hydraulique entraînée par le moteur électrique, d'un accumulateur de pression hydraulique alimenté par la pompe hydraulique, et d'un vérin de commande relié à l'accumulateur de pression hydraulique, par l'intermédiaire d'une vanne de commande, notamment une vanne proportionnelle ou une vanne de commutation séquentielle, le moteur électrique, la pompe hydraulique, l'accumulateur de pression hydraulique, la vanne de commande et le vérin de commande étant regroupés en un module de commande qui renferme des canaux pour relier l'accumulateur de pression hydraulique à la pompe hydraulique et à la vanne de commande, ainsi que pour relier la vanne de commande au vérin de commande, caractérisé en ce que dans le module de commande (9) est prévue au moins une autre vanne de commande (lla ou llb) qui est reliée à l'accumulateur de pression hydraulique (6), et alimente au moins un vérin récepteur (12a ou 12b) destiné à commander une boite de vitesses d'un véhicule automobile. 1. Hydraulic control assembly, in particular for a friction clutch of a motor vehicle, composed of an electric motor, a hydraulic pump driven by the electric motor, a hydraulic pressure accumulator supplied by the hydraulic pump, and a control cylinder connected to the hydraulic pressure accumulator, via a control valve, in particular a proportional valve or a sequential switching valve, the electric motor, the hydraulic pump, the accumulator of hydraulic pressure, the control valve and the control cylinder being combined in a control module which contains channels for connecting the hydraulic pressure accumulator to the hydraulic pump and the control valve, as well as for connecting the control valve to the control cylinder, characterized in that in the control module (9) is provided at least one other control valve (lla or llb) which is connected to the accumulator d e hydraulic pressure (6), and supplies at least one receiving cylinder (12a or 12b) intended to control a gearbox of a motor vehicle. 2. Ensemble de commande selon la revendication 1, caractérisé en ce que l'on prévoit en guise de vanne de commande (lla ou llb), au moins une vanne proportionnelle, ou bien au moins une vanne de commutation séquentielle, ou au moins une vanne de régulation de pression. 2. Control assembly according to claim 1, characterized in that there is provided as a control valve (lla or llb), at least one proportional valve, or at least one sequential switching valve, or at least one pressure regulating valve. 3. Ensemble de commande selon la revendication 1, caractérisé en ce que la vanne de commande (11) est reliée, par l'intermédiaire d'une liaison hydraulique (13), à un vérin récepteur (12a, 12b) destiné à la commande de la sélection d'indexage d'un rapport et/ou de l'enclenchement d'un rapport dans une boite de vitesses. 3. Control assembly according to claim 1, characterized in that the control valve (11) is connected, by means of a hydraulic connection (13), to a receiving cylinder (12a, 12b) intended for the control the selection of indexing of a report and / or the engagement of a report in a gearbox. 4. Ensemble de commande selon la revendication 1, caractérisé en ce que pour la commande de la sélection d'indexage d'un rapport, sont prévus une vanne de commande-(lla) et un vérin récepteur (12a). 4. Control assembly according to claim 1, characterized in that for controlling the indexing selection of a report, there are provided a control valve- (lla) and a receiving cylinder (12a). 5. Ensemble de commande selon la revendication 1, caractérisé en ce que pour la commande de l'enclenchement d'un rapport, sont prévus une vanne de commande (llb) et un vérin récepteur (12b). 5. Control assembly according to claim 1, characterized in that for controlling the engagement of a report, there are provided a control valve (llb) and a receiving cylinder (12b). 6. Ensemble de commande selon la revendication 1, caractérisé en ce que le vérin récepteur (12a ou 12b) est pourvu d'un capteur (14) de détection de la position. 6. Control assembly according to claim 1, characterized in that the receiving cylinder (12a or 12b) is provided with a sensor (14) for detecting the position. 7. Ensemble de commande selon la revendication 1, caractérisé en ce que dans le cas de l'utilisation d'une vanne de régulation de pression en guise de vanne de commande (11), le vérin récepteur (12) peut être sollicité par une pression de fonctionnement variable en fonction de la situation de marche ou de l'état de fonctionnement. 7. Control assembly according to claim 1, characterized in that in the case of the use of a pressure regulating valve as a control valve (11), the receiving cylinder (12) can be biased by a variable operating pressure depending on the operating situation or the operating state. 8. Ensemble de commande selon la revendication 1, caractérisé en ce que dans le cas de l'utilisation d'une vanne de régulation de pression et d'un capteur de déplacement, le vérin récepteur (12) est sollicité, en fonction de la situation, par une commande de pression ou une régulation de position.  8. Control assembly according to claim 1, characterized in that in the case of the use of a pressure regulating valve and a displacement sensor, the receiving cylinder (12) is biased, depending on the situation, by pressure control or position regulation.
FR9403410A 1993-03-26 1994-03-23 Hydraulic control assembly, in particular for a friction clutch of a motor vehicle. Expired - Fee Related FR2703007B1 (en)

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DE4309901A DE4309901B4 (en) 1992-11-10 1993-03-26 Hydraulic actuator - especially for a motor vehicle friction clutch

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FR2784948A1 (en) * 1998-10-27 2000-04-28 Mannesmann Sachs Ag Hydraulic actuation of clutch in automatic gearbox in motor vehicle has valve to decouple clutch in emergency conditions
EP1375951A1 (en) * 2002-06-27 2004-01-02 Renault s.a.s. Clutch control system
FR2841617A1 (en) * 2002-06-27 2004-01-02 Renault Sa CLUTCH CONTROL SYSTEM
WO2006082337A1 (en) * 2005-02-01 2006-08-10 Renault S.A.S. Partitioned gearbox
WO2011132073A1 (en) * 2010-04-21 2011-10-27 C.R.F. Società Consortile Per Azioni Electro-hydraulic actuation group for an automotive servo-assisted mechanical transmission
EP2381137A1 (en) * 2010-04-21 2011-10-26 C.R.F. Società Consortile per Azioni Electro-hydraulic group for an automotive servo-assisted mechanical transmission
EP2381138A1 (en) * 2010-04-21 2011-10-26 C.R.F. Società Consortile per Azioni Electro-hydraulic actuation group for an automotive servoassisted mechanical transmission
WO2011132072A3 (en) * 2010-04-21 2011-12-22 C.R.F. Società Consortile Per Azioni Electro-hydraulic actuation group for an automotive servo- assisted mechanical transmission
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US9200705B2 (en) 2010-04-21 2015-12-01 C.R.F. Società Consortile Per Azioni Electro-hydraulic actuation group for an automotive servo-assisted mechanical transmission
EP3279494A1 (en) * 2016-08-05 2018-02-07 Jtekt Hpi Hydraulic actuation system of a clutch, mainly for automobile
FR3054816A1 (en) * 2016-08-05 2018-02-09 Jtekt Hpi HYDRAULIC ACTUATION SYSTEM OF A CLUTCH DEVICE, IN PARTICULAR FOR A MOTOR VEHICLE
CN107605991A (en) * 2017-10-25 2018-01-19 南京越博动力***股份有限公司 A kind of automatic clutch fluid pressure type controlling organization in hybrid vehicle

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DE4309901B4 (en) 2010-07-01
FR2703007B1 (en) 1995-07-13
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BR9401211A (en) 1994-11-08

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