WO1999032808A1 - Unite de changement de vitesses - Google Patents

Unite de changement de vitesses Download PDF

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Publication number
WO1999032808A1
WO1999032808A1 PCT/EP1998/008198 EP9808198W WO9932808A1 WO 1999032808 A1 WO1999032808 A1 WO 1999032808A1 EP 9808198 W EP9808198 W EP 9808198W WO 9932808 A1 WO9932808 A1 WO 9932808A1
Authority
WO
WIPO (PCT)
Prior art keywords
switching
piston
cylinder
shift
valves
Prior art date
Application number
PCT/EP1998/008198
Other languages
German (de)
English (en)
Inventor
Rainer Petzold
Original Assignee
Zf Friedrichshafen Ag
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 Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO1999032808A1 publication Critical patent/WO1999032808A1/fr

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
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/3023—Constructional features of the final output mechanisms the final output mechanisms comprising elements moved by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means
    • 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
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20561—Type of pump reversible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/765—Control of position or angle of the output member
    • F15B2211/7653—Control of position or angle of the output member at distinct positions, e.g. at the end position
    • 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
    • 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

Definitions

  • the invention relates to a switching device with a hydraulic or pneumatic auxiliary for manual transmissions in vehicles according to the kind defined in the preamble of claim 1.
  • the switching piston is braked shortly before it reaches its end stop position by being displaced against a chamber with an enclosed air volume.
  • the switching piston often springs back when it is guided against the air cushion.
  • the hydraulic end position damping known from practice is based on the principle that the switching piston must displace a hydraulic aid shortly before it reaches its end position, the displacement resistance braking the movement of the switching piston when it reaches its end stop.
  • damping elements are generally elastomers or other resilient stops, which have the considerable disadvantage that the switching piston springs back again when it hits this buffered stop surface.
  • DE 37 40 669 C2 discloses end position damping for a pneumatic shock absorber with a cylinder and a piston, which has a check valve which forms an inlet and via which a pressure space in the cylinder which is delimited by the piston is connected to an external pressure source, and an outlet has outlet duct.
  • the external pressure source is connected to a pressure chamber via a pressure regulator, and a sensor and an electronic pressure control circuit acting on the pressure regulator as a function of the sensor signal are provided for detecting the movement and / or the position of the piston at least in the region of the minimum pressure chamber volume.
  • the present invention is therefore based on the object of providing a switching device in which the end stop of the switching piston in the switching cylinder is significantly damped and, at the same time, shorter switching times are achieved.
  • the end stop of the switching piston is considerably damped, and the switching elements involved in a switching process are due to the reduced dynamic on - Reduced impact forces.
  • the end position damping of the switching piston in the switching cylinder is particularly effective through the use of pulsed 2/2-way valves, which are controlled depending on the position of the switching piston in the switching cylinder, as this achieves a variable piston speed, and the switching piston before reaching its end stop without any design Effort can be slowed down.
  • Another significant advantage of the switching device according to the invention is that the switching times are significantly reduced by largely minimizing the dead times in the switching sequence. Switching times can be reduced by up to 30%.
  • the use of a displacement measuring device together with the spontaneously reacting, pulsable valves also has the advantage that two contradicting requirements, namely shorter switching times and longer synchronous life, can be combined with one another and solved in such a way that the pulsating valves are known react spontaneously to the current gear position and pressurize the shift piston quickly and gently in accordance with the current practical requirements and thus set it in motion.
  • Figure 1 shows the arrangement of the switching devices in the transmission.
  • Fig. 2 shows the summary of several switching devices and Fig. 3 is a schematic diagram of a switching device.
  • the gearbox 102 has a clutch bell 104, a main gearbox 106 and an auxiliary gearbox 108, furthermore an input shaft 110 and an output shaft 112 with an output flange 114.
  • a component 116 is provided on the main gearbox 106.
  • the component 116 shows three individual switching devices 118, 120 and 122 in the arrangement shown here.
  • the switching device 118 shown by way of example engages with a shift fork 124 in a sliding sleeve 126 which is axially displaceable along a shaft 128 and is connected to the shaft 128 in a rotationally fixed manner.
  • the switching devices 118, 120 and 122 are connected via electrical lines 134 to a control device 136, for example an electronic transmission computer or vehicle control computer.
  • the switching devices 118, 120 and 122 are also connected to a pressure source 138 for an actuating fluid via lines 140.
  • Fig. 2 shows a section of the housing of gear 102, in which the switching devices 118, 120 and 122 are combined in a component 116.
  • the component 116 is fastened to the transmission 102 with the aid of connecting elements 144.
  • Lines 140 for supplying the actuating fluid and electrical lines 134 for connection to the control device 136 lead to the switching devices 118, 120 and 122.
  • 3 shows a basic illustration of a switching device 118 for automated manual transmissions in vehicles with position measuring device and pulsable directional valves in longitudinal section, which has a switching cylinder 1, which is formed from two cylinder parts 1A and 1B, and a switching piston 2.
  • the switching cylinder 1 By designing the switching cylinder 1 from two separate cylinder parts 1A and 1B, the moving masses can be considerably reduced, as a result of which the end stop damping is made considerably easier.
  • the switching piston 2 designed as a switching element moves between the fixed cylinder parts 1A and IB.
  • the shift piston 2 is designed with a shift fork 2A as a one-piece component, so that connecting elements between the shift piston 2 and another shift element, such as the shift fork 2A or a possible shift rocker, are not required.
  • the connection between the shift piston 2 and shift fork 2A is thus robust and designed in the shortest possible way.
  • the cylinder derwel 1A and IB serve as switching elements, whereby a more variable gear design is possible.
  • a displacement measuring device 3 is attached parallel to the displacement axis of the switching piston 2, for example inductive displacement sensors, which are connected to a control device 136, which is dependent on the inductive displacement sensors determined position of the switching piston 2 passes on electronic control signals to pulsable valves 4, 5, 6 and 7.
  • the switching piston 2 has a guide shoulder 2B, over which it is guided in a recess 8, which is formed on each of the cylinder parts 1A and IB. Both the cylinder parts 1A and IB and the switching piston 2 are arranged around a rail 9 which runs centrally through the cylinder parts 1A and IB and the switching piston 2 in the direction of movement of the switching piston 2.
  • the arrangement of the cylinder parts 1A and IB of the shift cylinder 1 and the shift piston 1 on the rail 9 is particularly advantageous in that a series of shift cylinders can be easily arranged in a small installation space, the reduced number of parts and the simple assembly bringing decisive cost advantages .
  • the actuations for all switching devices of a transmission can be attached to this rail 9.
  • the cylinder parts 1A and IB are pre-assembled on the rail 9, they can of course also be fixed in the installed state depending on the gearbox tolerances.
  • a pneumatic or hydraulic pressure medium is supplied to the switching device from a pressure source 138 via the pressure lines 10 or 11.
  • two electromagnetic 2/2-way valves 4 and 5 or 6 and 7 are interposed, which control the flow of the pressure medium through the pressure lines 10 and 11 such that the switching piston 2 moves at a speed which corresponds to an optimal speed determined empirically or via a simulation in this path position.
  • the type of valve actuation can be adjusted depending on the gearbox and the masses to be switched.
  • the pulsable valves 4, 5, 6 and 7 are designed for continuous operation at 4 volts, but they are operated here with 24 volt pulses. By activating the pulse valves 4, 5, 6 and 7 with strong current pulses, they react very quickly.
  • the pulse valves 4, 5, 6 and 7 are controlled via the control device 136 as a function of the position of the switching piston 2 in the switching cylinder 1, which is detected by the displacement measuring device 3. Depending on the position of the switching piston 2, different electrical pulses are emitted to the pulse valves 4, 5, 6 and 7, the pulse valves being opened with a predefined, high pulse frequency and being closed with a predefined, lower pulse frequency.
  • the switching piston speed is varied by two pulsable 2/2-way valves in such a way that the switching piston is moved as far as possible with full pressure force during the switching path up to the start of synchronization of the transmission and at a low speed after the end of the synchronization phase its end position is brought.
  • the pulse valve 5 which has the function of an inflow valve, is opened, while the pulse valve 4, which is designed as an outflow valve, is closed.
  • Pressure medium thus passes via the line 10 through the cylinder part 1A into the working space 12 of the switching piston 2 and moves the switching piston 2 from a stop surface 13 on the cylinder part 1A in the direction of a stop surface 14 on the cylinder part IB opposite the stop surface 13.
  • the part of the working chamber 12 of the switching piston lying in the direction of movement of the switching piston 2 is relaxed during the entire switching process via the pressure line 11 and the opened pulse valve 6, which is designed as a drain valve.
  • the pulse valve 7 serving the pressure medium supply is closed.
  • the switching piston 2 is unlocked, which sets it in motion again in the direction of its end position on the stop face 14, at high speed due to the high pressure applied during the synchronization process.
  • the respective position of the switching piston 2 is detected by the displacement measuring device 3, which controls the pulse valves 6 and 7 via electrical pulses in such a way that the venting pulse valve 6 is closed, which leads to a so-called cushion of pressure medium causing the movement of the switching piston 2 drastically reduced on the last short path to the stop surface 14.
  • the pressure supply via the pulse valve 5 on the pressure line 10 is already set during or towards the end of the brief stoppage of the switching piston 2 during the synchronization phase of the transmission by closing the supply valve 5.
  • the pulse valve 6 is switched into an open position by the displacement measuring device 3 directly before the stop of the switching piston 2 on the stop surface 14, so that the switching piston 2 and Stop surface 14 located Druckmit- tel can escape via the pressure line 11 and the switching piston 2 does not spring back when it stops on the stop surface 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

L'invention concerne une unité de changement de vitesses (118) présentant un système d'asservissement hydraulique ou pneumatique, pour une boîte de vitesses de véhicule. Cette unité comprend un vérin de commande des vitesses (1) et un piston de commande (2) placé à l'intérieur de ce dernier, qui forment des éléments de changement de vitesses. Un dispositif de mesure de déplacement (3) détermine la position du piston (2) dans le vérin (1). Le piston (2) est raccordé à une source de pression externe (138) par l'intermédiaire de vannes électromagnétiques (4, 5, 6, 7). L'un des éléments de changement de vitesses (1, 2) peut être raccordé directement avec une fourchette de commande des vitesses (2A) et peut se déplacer par rapport à l'autre. Il est possible de faire varier la vitesse de déplacement des éléments de changement de vitesses (1, 2) l'un par rapport à l'autre pendant un changement de vitesse, par l'intermédiaire des vannes électromagnétiques (4, 5, 6, 7) se présentant sous la forme de distributeurs 2/2 pouvant être pulsés, en fonction de la position, déterminée par le dispositif de mesure de déplacement (3), de l'élément de changement de vitesses se présentant sous la forme du piston de commande (2).
PCT/EP1998/008198 1997-12-19 1998-12-14 Unite de changement de vitesses WO1999032808A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19756638.3 1997-12-19
DE1997156638 DE19756638A1 (de) 1997-12-19 1997-12-19 Schalteinrichtung

Publications (1)

Publication Number Publication Date
WO1999032808A1 true WO1999032808A1 (fr) 1999-07-01

Family

ID=7852587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/008198 WO1999032808A1 (fr) 1997-12-19 1998-12-14 Unite de changement de vitesses

Country Status (2)

Country Link
DE (1) DE19756638A1 (fr)
WO (1) WO1999032808A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6935204B2 (en) 2003-10-31 2005-08-30 Caterpillar Inc Automated manual transmission and shift method
US11242926B2 (en) * 2016-12-22 2022-02-08 Eaton Cummins Automated Transmission Tech., Llc System, method, and apparatus for operating a high efficiency, high output transmission
CN115585260A (zh) * 2022-09-19 2023-01-10 陕西法士特齿轮有限责任公司 一种集成式电控气动换挡执行机构

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005010409A1 (fr) * 2003-07-25 2005-02-03 Continental Teves Ag & Co. Ohg Circuit hydraulique
DE102004006683A1 (de) * 2004-02-11 2005-09-01 Zf Friedrichshafen Ag Schalteinheit
DE102005011273A1 (de) 2005-03-11 2006-09-21 Zf Friedrichshafen Ag Verfahren zur Steuerung von Schaltabläufen in einem automatisierten Schaltgetriebe in Vorgelegebauweise
US7845247B2 (en) 2007-05-30 2010-12-07 Gm Global Technology Operations, Inc. Shift fork actuation system for control of synchronizer position
DE102008001688A1 (de) * 2008-05-09 2009-11-12 Zf Friedrichshafen Ag Anordnung zum Unterstützen von manuellen Schaltungen
DE102022108361A1 (de) 2022-04-07 2023-10-12 Zf Cv Systems Europe Bv Schaltvorrichtung für ein Schaltgetriebe eines Fahrzeugs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508564A (en) * 1947-07-30 1950-05-23 Cardwell Mfg Company Inc Air controlled shifting mechanism
US4416187A (en) * 1981-02-10 1983-11-22 Nystroem Per H G On-off valve fluid governed servosystem
GB2163224A (en) * 1984-07-30 1986-02-19 Diesel Kiki Co Shift lever unit for motor vehicle transmission
FR2598526A1 (fr) * 1986-05-06 1987-11-13 Renault Vehicules Ind Dispositif de gestion electronique d'un actionneur de crabots de boite de vitesses.
EP0293800A2 (fr) * 1987-05-30 1988-12-07 Diesel Kiki Co., Ltd. Dispositif de commande pour une transmission automatique
EP0723097A2 (fr) * 1995-01-21 1996-07-24 New Holland U.K. Limited Système de commande hydraulique pour sychronisateur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3417473A1 (de) * 1984-05-11 1985-11-14 J.M. Voith Gmbh, 7920 Heidenheim Servogeschaltetes stufenschaltgetriebe, insbesondere fuer kraftfahrzeuge
DE3740669A1 (de) * 1987-12-01 1989-06-15 Festo Kg Pneumatischer stossdaempfer
DE4038170A1 (de) * 1990-11-30 1992-06-04 Claas Ohg Dreistellungszylindersystem
DE4234063C1 (de) * 1992-10-09 1994-03-10 Vickers Systems Gmbh Vorrichtung zur elektronischen Endlagendämpfung
DE19507704A1 (de) * 1995-03-04 1996-09-05 Hydraulik Ring Gmbh Stellantrieb für Schaltgetriebe von Kraftfahrzeugen
GB9512838D0 (en) * 1995-06-23 1995-08-23 Massey Ferguson Sa Synchromesh control apparatus and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508564A (en) * 1947-07-30 1950-05-23 Cardwell Mfg Company Inc Air controlled shifting mechanism
US4416187A (en) * 1981-02-10 1983-11-22 Nystroem Per H G On-off valve fluid governed servosystem
GB2163224A (en) * 1984-07-30 1986-02-19 Diesel Kiki Co Shift lever unit for motor vehicle transmission
FR2598526A1 (fr) * 1986-05-06 1987-11-13 Renault Vehicules Ind Dispositif de gestion electronique d'un actionneur de crabots de boite de vitesses.
EP0293800A2 (fr) * 1987-05-30 1988-12-07 Diesel Kiki Co., Ltd. Dispositif de commande pour une transmission automatique
EP0723097A2 (fr) * 1995-01-21 1996-07-24 New Holland U.K. Limited Système de commande hydraulique pour sychronisateur

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6935204B2 (en) 2003-10-31 2005-08-30 Caterpillar Inc Automated manual transmission and shift method
US11242926B2 (en) * 2016-12-22 2022-02-08 Eaton Cummins Automated Transmission Tech., Llc System, method, and apparatus for operating a high efficiency, high output transmission
US11378179B2 (en) * 2016-12-22 2022-07-05 Eaton Cummins Automated Transmission Tech., Llc System, method, and apparatus for operating a high efficiency, high output transmission
US11402013B2 (en) * 2016-12-22 2022-08-02 Eaton Cummins Automated Transmission Tech., Llc System, method, and apparatus for operating a high efficiency, high output transmission
CN115585260A (zh) * 2022-09-19 2023-01-10 陕西法士特齿轮有限责任公司 一种集成式电控气动换挡执行机构

Also Published As

Publication number Publication date
DE19756638A1 (de) 1999-06-24

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