DE102006022149A1 - Fluid-pressure actuated power amplifier device for manual shift of car gearing, has actuating shaft coupled with actuating stick and with gear which is divided in circuit-lateral part and in gear lateral part - Google Patents
Fluid-pressure actuated power amplifier device for manual shift of car gearing, has actuating shaft coupled with actuating stick and with gear which is divided in circuit-lateral part and in gear lateral part Download PDFInfo
- Publication number
- DE102006022149A1 DE102006022149A1 DE102006022149A DE102006022149A DE102006022149A1 DE 102006022149 A1 DE102006022149 A1 DE 102006022149A1 DE 102006022149 A DE102006022149 A DE 102006022149A DE 102006022149 A DE102006022149 A DE 102006022149A DE 102006022149 A1 DE102006022149 A1 DE 102006022149A1
- Authority
- DE
- Germany
- Prior art keywords
- side part
- circuit
- transmission
- power amplifier
- pressure
- 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- Withdrawn
Links
Classifications
-
- 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
- F15B15/204—Control means for piston speed or actuating force without external control, e.g. control valve inside the piston
-
- 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
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
-
- 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
- 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
- F15B2211/20538—Type of pump constant capacity
-
- 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
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
-
- 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
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
-
- 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
- F15B2211/329—Directional control characterised by the type of actuation actuated 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
- 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
- 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
- F16H2061/301—Hydraulic or pneumatic motors or related fluid control means therefor for power assistance, i.e. servos with follow up action
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft einen druckmittelbetätigten Kraftverstärker für die Handschaltung eines Fahrzeuggetriebes.The The present invention relates to a fluid pressure operated power amplifier for the manual transmission a vehicle transmission.
Die
Die
Die
Aufgabe der Erfindung ist es, eine Vorrichtung zu schaffen, die druckmittelunterstützt die vom Fahrer aufgebrachte Schaltkraft verstärkt. Dabei sollen axiale, in Längsrichtung der Vorrichtung wirkende Kräfte und Drehmomente um die Längsachse der Vorrichtung übertragbar sein, und die Vorrichtung soll hinsichtlich der Gestaltung der Schaltkraftprofile, insbesondere der Rückkoppelung der zu überwindenden Schaltkraft auf den Fahrer, flexibel anwendbar sein.task The invention is to provide a device that supports the pressure medium Stronger force applied by the driver. In this case, axial, in longitudinal direction the forces acting on the device and torques about the longitudinal axis the device transferable be, and the device should be in terms of the design of the switching force profiles, in particular the feedback the one to be overcome Shifting force on the driver, be flexibly applicable.
Eine diesen Anforderungen entsprechende Kraftverstärkungsvorrichtung ist im Patentanspruch 1 angegeben.A this requirement corresponding power amplifying device is in the claim 1 indicated.
Der erfindungsgemäße Kraftverstärker ermöglicht die verstärkte Übertragung der Schaltkraft, wobei ein vom mechanisch geschalteten Getriebe herrührendes Schaltkraftprofil nachgebildet wird. Die Schaltung des Getriebes ist jedoch auch ohne Druckmittelunterstützung möglich, so dass im Fehlerfall, z. B. bei fehlendem Hydraulikdruck, eine Schaltung lediglich mit der vom Fahrer aufgebrachten Handkraft möglich bleibt.Of the Power amplifier according to the invention allows the increased transmission the switching force, wherein one of the mechanically switched transmission herrührendes Switching force profile is simulated. The circuit of the transmission However, it is also possible without pressure medium support, so that in case of error, z. B. in the absence of hydraulic pressure, a circuit only with the applied by the driver hand power remains possible.
Ein Vorteil des erfindungsgemäßen Kraftverstärkers ist der kompakte Aufbau zur Übertragung der Schaltkräfte, bei dem sowohl axiale Bewegungen als auch Drehbewegungen um die Längsachse übertragen werden können. Zugleich wird ein robuster Aufbau erreicht, der trotzdem hinsichtlich der Verstärkung und der daraus resultierenden Schaltkraftkennlinien flexibel anpassbar ist. Die Schaltkraft wird von einem schaltungsseitigen Teil einer Schaltwelle über einen diese umgebenden Hydraulikkolben auf einen getriebeseitigen Teil der Schaltwelle übertragen. Im Inneren des Hydraulikkolbens, zwischen den Teilen der Schaltwelle kann damit ein System mit einem Ventilschieber und einer diesen umgebenden Ventilhülse angeordnet werden. Die Übertragung der Schaltkraft in axialer Richtung erfolgt über den Hydraulikkolben, wobei eine daran angeordnete Kolbenfläche die Verstärkung der aufgebrachten Schaltkraft bei Beaufschlagung mit einem Druckmittel bewirkt. Die Übertragung des Dreh moments um die Achse des Schaltkraftverstärkers erfolgt ebenfalls über den Hydraulikkolben, welcher die Teile der Schaltwelle umgibt.An advantage of the power amplifier according to the invention is the compact design for transmitting the switching forces, in which both axial movements and rotational movements can be transmitted about the longitudinal axis. At the same time a robust construction is achieved, which is nevertheless flexibly adaptable with regard to the gain and the resulting switching force characteristics. The switching force is from a circuit-side part of a switching shaft over to transmit a surrounding hydraulic piston on a transmission-side part of the shift shaft. In the interior of the hydraulic piston, between the parts of the switching shaft so that a system with a valve spool and a surrounding valve sleeve can be arranged. The transmission of the switching force in the axial direction via the hydraulic piston, wherein a piston surface arranged thereon causes the gain of the applied switching force when exposed to a pressure medium. The transmission of the rotational moments about the axis of the switching power amplifier also takes place via the hydraulic piston, which surrounds the parts of the switching shaft.
Der erfindungsgemäße Kraftverstärker ermöglicht eine Verringerung der Schaltkraft und des Schaltwegs durch kleine Übersetzungen. Es sind daher bei einer erhöhten Schaltqualität sportlich kurze Schaltwege möglich. Die Unterstützung der Schaltkraft ist proportional zu der Last hydraulisch geregelt. Dabei kann als Hydraulikfluid das Getriebeöl verwendet werden. Ferner ergeben sich Packagevorteile für ein besseres Design im Innenraum des Fahrzeugs.Of the Power amplifier according to the invention allows a Reduction of the switching force and the switching path through small translations. It is therefore at an elevated level shift quality sporty short shift possible. Support the switching force is hydraulically regulated in proportion to the load. there can be used as hydraulic fluid, the transmission oil. Further Package advantages result for one better design in the interior of the vehicle.
Vorzugsweise ist der schaltungsseitige Teil der Schaltwelle drehfest mit dem Hydraulikkolben verbunden, wobei die Eingangswelle in der Schaltwelle axial verschiebbar ist. Der getriebeseitige Teil der Schaltwelle ist fest mit dem Hydraulikkolben verbunden. Dreh- sowie Längsbewegungen werden direkt zum getriebeseitigen Teil der Schaltwelle übertragen.Preferably is the circuit-side part of the shift shaft rotation with the Hydraulic piston connected, wherein the input shaft in the switching shaft is axially displaceable. The gearbox side of the selector shaft is firmly connected to the hydraulic piston. Rotary and longitudinal movements are transmitted directly to the gearbox side of the stem.
Die Ankoppelung an den schaltungsseitigen Teil der Schaltwelle erfolgt vorzugsweise elastisch über eine Feder, durch deren Gestaltung das Ansprechverhalten des Schaltkraftverstärkers beeinflusst werden kann.The Coupling takes place at the circuit-side part of the switching shaft preferably elastically over a spring whose design influences the response of the switching power amplifier can be.
Vorzugsweise sind die Druckmittelleitungen zu dem Hydraulikkolben mit den am Ventilschieber ausgebildeten Kolbenflächen über gedrosselte Zuleitungen verbunden. Am Ventilschieber erfolgt damit, verzögert zum Druckaufbau am Hydraulikkolben, ein Druckaufbau auf die Kolbenflächen des Ventilschiebers. Der Ventilschieber wird dadurch mit einer Kraft beaufschlagt, die diesen zurück in die geschlossene Mittelstellung bewegt. Die Rückstellung des Ventilschiebers ist somit nicht nur von den auf diesen einwirkenden und in seine Mittelstellung belastenden Federn abhängig, sondern erfolgt zusätzlich in Abhängigkeit vom Druckaufbau am Hydraulikkolben und damit abhängig von der vom Fahrer gegen die zu überwindende Schaltkraft bewirkten Verstellbewegung. Damit kann ein besonders flexibles, an den Schaltverlauf bei Hand schaltung ohne Verstärkung angepasstes Verhalten der Kraftübertragung des Kraftverstärkers erzielt werden.Preferably are the pressure medium lines to the hydraulic piston with the am Valve slide trained piston surfaces over throttled supply lines connected. At the valve spool takes place, delayed to build up pressure on the hydraulic piston, a build-up of pressure on the piston surfaces of the valve spool. The valve spool is thereby applied with a force, return this one moved to the closed center position. The return of the valve spool is thus not only of those acting on him and in his Mid-position loading springs dependent, but additionally takes place in dependence from the build-up of pressure on the hydraulic piston and thus dependent on the driver the one to be overcome Switching force caused adjustment. This can be a special flexible, adapted to the switching process with manual switching without amplification Behavior of the power transmission of the power amplifier be achieved.
In einer weiteren Ausbildung der Erfindung können die Teile der Schaltwelle und deren Führung in dem Hydraulikkolben vertauscht werden. Bei dieser Ausgestaltung ist der schaltungsseitige Teil der Schaltwelle direkt an den Hydraulikkolben gekoppelt, und der getriebeseitige Teil der Schaltwelle ist drehfest, jedoch axial verschiebbar mit dem Hydraulikkolben verbunden.In a further embodiment of the invention, the parts of the switching shaft and their leadership in be reversed the hydraulic piston. In this embodiment is the circuit side part of the stem directly to the hydraulic piston coupled, and the transmission-side part of the shift shaft is rotationally fixed, but axially displaceable connected to the hydraulic piston.
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird nachfolgend näher erläutert. Es zeigt:One preferred embodiment The invention is illustrated in the drawings and will become apparent below explained in more detail. It shows:
In
Der
Hydraulikzylinder
Auf
dem schaltungsseitigen Teil
Die
Feder C1 ist zwischen den Anschlagelementen
Im
Weiteren werden die Elemente zur Schaltkraftverstärkung beschrieben
(
In
den Hydraulikkolben
Bei
einer Bewegung des schaltungsseitigen Teils
Die
Ventilhülse
Wird
der Ventilschieber
Durch
entsprechende Auslegung der Kolbenfläche des Ventilschiebers im
Ringkanal G, F, der Federn C2, C1, der Düsen
Als Hydraulikfluid für den Kraftverstärker kann das Getriebeöl des zugehörigen Getriebes verwendet werden.When Hydraulic fluid for the power amplifier can the gear oil of the associated Getriebes be used.
Abweichend von der in den Zeichnungen dargestellten und vorstehend beschriebenen Ausführungsform können die beiden Teile der Schaltwelle und deren Führung in dem Hydraulikkolben getauscht werden. Bei dieser abgewandelten Ausführungsform ist der schaltungsseitige Teil der Schaltwelle direkt an den Hydraulikkolben gekoppelt, und der getriebeseitige Teil der Schaltwelle ist mit dem Hydraulikkolben axial verschiebbar, aber drehfest verbunden.deviant from that shown in the drawings and described above embodiment can the two parts of the shift shaft and their leadership in the hydraulic piston it will be exchanged. In this modified embodiment, the circuit side Part of the selector shaft coupled directly to the hydraulic piston, and the Transmission side part of the shift shaft is connected to the hydraulic piston axially displaceable, but rotatably connected.
- 11
- Getriebegehäusegearbox
- 22
- Hydraulikzylinderhydraulic cylinders
- 33
- Hydraulikkolbenhydraulic pistons
- 44
- Druckraumpressure chamber
- 55
- Druckraumpressure chamber
- 66
- Dichtelement (Kolbendichtung)sealing element (Piston seal)
- 77
- Dichtelemente (Stangendichtung)sealing elements (Rod seal)
- 88th
- Führungselementeguide elements
- 99
- schaltungsseitiger Teil der Schaltwellecircuit-side Part of the switching shaft
- 1010
- getriebeseitiger Teil der Schaltwelletransmission-side Part of the switching shaft
- 1111
- KugellaufbahnenBall races
- 1212
- Kugelnroll
- 1313
- Anschlagelementstop element
- 1414
- Anschlagelementstop element
- 1515
- Verschlussstückclosing piece
- 1616
- Lagerkäfigbearing cage
- 1717
- Sicherungselementfuse element
- 1818
- Dichtungpoetry
- 1919
- Betätigungsnadeloperating needle
- 2020
- Scheibedisc
- 2121
- Scheibedisc
- 2222
- Ventilhülsevalve sleeve
- 2323
- Ventilschiebervalve slide
- 2424
- Ringring
- 2525
- Ringring
- 2626
- Adapteradapter
- 2727
- Scheibedisc
- 2828
- Bohrung zum Tankdrilling to the tank
- 2929
- Bohrung zum Tankdrilling to the tank
- 3030
- Bohrungdrilling
- 3131
- Düsejet
- 3232
- Düse (verstellbar)Nozzle (adjustable)
- 3333
- Bohrungdrilling
- 3434
- Düsejet
- 3535
- Düse (verstellbar)Nozzle (adjustable)
- 3636
- Bohrungdrilling
- 3737
- Bohrungdrilling
- 3838
- Vorratsraumpantry
- 3939
- Öffnungopening
- 4040
- Druckbehälterpressure vessel
- 4141
- Rückschlagventilcheck valve
- 4242
- Filterfilter
- 4343
- Pumpepump
- 4444
- E-MotorE-Motor
- 4545
- Filterfilter
- 4646
- linke Kolbenringflächeleft Piston Ring
- 4747
- rechte Kolbenringflächeright Piston Ring
- C1C1
- Federfeather
- C2C2
- Federfeather
- C3C3
- Federfeather
- A, B, D, E1, E2, F, GA, B, D, E1, E2, F, G
- Ringkanäle annular channels
- TT
- Tanktank
- YH Y is H
- Spielgame
- YN Y N
- Spielgame
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006022149A DE102006022149A1 (en) | 2006-05-12 | 2006-05-12 | Fluid-pressure actuated power amplifier device for manual shift of car gearing, has actuating shaft coupled with actuating stick and with gear which is divided in circuit-lateral part and in gear lateral part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006022149A DE102006022149A1 (en) | 2006-05-12 | 2006-05-12 | Fluid-pressure actuated power amplifier device for manual shift of car gearing, has actuating shaft coupled with actuating stick and with gear which is divided in circuit-lateral part and in gear lateral part |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006022149A1 true DE102006022149A1 (en) | 2007-11-15 |
Family
ID=38580005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006022149A Withdrawn DE102006022149A1 (en) | 2006-05-12 | 2006-05-12 | Fluid-pressure actuated power amplifier device for manual shift of car gearing, has actuating shaft coupled with actuating stick and with gear which is divided in circuit-lateral part and in gear lateral part |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102006022149A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109296527A (en) * | 2018-12-01 | 2019-02-01 | 李军 | A kind of reciprocating pump control valve |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1961597A1 (en) * | 1969-12-09 | 1971-06-09 | Porsche Kg | Switching device for speed change transmissions, especially for motor vehicles |
DE2600483B1 (en) * | 1976-01-08 | 1976-12-30 | Zahnradfabrik Friedrichshafen | Power-assisted switching device for change gear |
EP0123051A2 (en) * | 1983-03-17 | 1984-10-31 | FAG KUGELFISCHER GEORG SCHÄFER Kommanditgesellschaft auf Aktien | Mechanical actuating device and amplification device applied thereto |
DE19539471A1 (en) * | 1995-10-24 | 1997-04-30 | Zahnradfabrik Friedrichshafen | Switching device for motor vehicle change gearbox - pneumatic shift servo - |
DE19839855A1 (en) * | 1998-09-02 | 2000-03-09 | Zahnradfabrik Friedrichshafen | Switching device for motor vehicle gearbox |
-
2006
- 2006-05-12 DE DE102006022149A patent/DE102006022149A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1961597A1 (en) * | 1969-12-09 | 1971-06-09 | Porsche Kg | Switching device for speed change transmissions, especially for motor vehicles |
DE2600483B1 (en) * | 1976-01-08 | 1976-12-30 | Zahnradfabrik Friedrichshafen | Power-assisted switching device for change gear |
EP0123051A2 (en) * | 1983-03-17 | 1984-10-31 | FAG KUGELFISCHER GEORG SCHÄFER Kommanditgesellschaft auf Aktien | Mechanical actuating device and amplification device applied thereto |
DE19539471A1 (en) * | 1995-10-24 | 1997-04-30 | Zahnradfabrik Friedrichshafen | Switching device for motor vehicle change gearbox - pneumatic shift servo - |
DE19839855A1 (en) * | 1998-09-02 | 2000-03-09 | Zahnradfabrik Friedrichshafen | Switching device for motor vehicle gearbox |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109296527A (en) * | 2018-12-01 | 2019-02-01 | 李军 | A kind of reciprocating pump control valve |
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