DE10151751A1 - Device for controlling hydraulically controllable shift elements for automatic gearbox has pressure restricting valve on release line of valve device setting low pressure to ensure pipes remain filled - Google Patents

Device for controlling hydraulically controllable shift elements for automatic gearbox has pressure restricting valve on release line of valve device setting low pressure to ensure pipes remain filled

Info

Publication number
DE10151751A1
DE10151751A1 DE2001151751 DE10151751A DE10151751A1 DE 10151751 A1 DE10151751 A1 DE 10151751A1 DE 2001151751 DE2001151751 DE 2001151751 DE 10151751 A DE10151751 A DE 10151751A DE 10151751 A1 DE10151751 A1 DE 10151751A1
Authority
DE
Germany
Prior art keywords
pressure
valve
line
switching elements
ensure
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.)
Ceased
Application number
DE2001151751
Other languages
German (de)
Inventor
Bernhard Sich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
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
Priority to DE2001151751 priority Critical patent/DE10151751A1/en
Publication of DE10151751A1 publication Critical patent/DE10151751A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0262—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 characterised by the signals used the signals being hydraulic
    • F16H61/0276—Elements specially adapted for hydraulic control units, e.g. valves
    • 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
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • 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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/005—Leakage; Spillage; Hose burst
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief 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
    • F15B2211/50—Pressure control
    • F15B2211/555—Pressure control for assuring a minimum pressure, e.g. by using a back pressure 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
    • F15B2211/50—Pressure control
    • F15B2211/56—Control of an upstream 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
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8609—Control during or prevention of abnormal conditions the abnormal condition being cavitation
    • 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
    • F16H2061/004—Venting trapped air from hydraulic systems

Abstract

A valve device (3) which is connected to a shift element (1,2) is connected to a system pressure line, control line (4) and release line (5). A pressure restricting valve (6) is provided on the release line of the at least one valve device and sets a predetermined low pressure so that the pipes always remain filled. The pressure restricting valve is attached to a pressure line so that pressurised medium can be fed into the release lines.

Description

Die vorliegende Erfindung betrifft eine Einrichtung zur Ansteuerung von hydraulisch ansteuerbaren Schaltelementen, insbesondere von Schaltelementen eines Automatgetriebes gemäß dem Oberbegriff des Patentanspruches 1. The present invention relates to a device for controlling hydraulically controllable Switching elements, in particular switching elements of a Automatic transmission according to the preamble of claim 1.

Heutzutage werden insbesondere bei Automatgetrieben die Schaltelemente über Ventileinrichtungen hydraulisch angesteuert. Zu diesem Zweck sind Stellzylinder und Zuführleitungen vorgesehen, um die Funktionalität der Schaltelemente zu gewährleisten. Die verwendeten Ventileinrichtungen sind mit einer Systemdruckleitung, einer Ansteuerleitung und mit einer Entlüftungsleitung verbunden, wobei ein Arbeitsanschluss für die Verbindung mit den Schaltelementen sorgt. Nowadays, especially in automatic transmissions the switching elements hydraulically via valve devices driven. For this purpose, actuators and Feed lines provided to the functionality of the To ensure switching elements. The valve devices used are with a system pressure line, a control line and connected to a vent line, wherein a Working connection for the connection with the switching elements provides.

Es kommt jedoch vor, dass Stellzylinder und Zuführleitungen aufgrund von Leckagen, beispielsweise an Dichtungen, kein oder zu wenig Druckmedium, vorzugsweise Öl, beinhalten. Hinzu kommt, dass es nach dem Stand der Technik keine Informationen über den Ölstand in den dafür vorgesehenen Leitungen zur Verfügung stehen. Dies kann in Abhängigkeit von den Füllbedingungen zu unterschiedlichen Schaltverhalten der Kupplungen bzw. Schaltelemente sowie zu Schaltstößen führen. However, it happens that actuating cylinders and Supply lines due to leaks, e.g. on seals, no or too little pressure medium, preferably oil, include. In addition, there is none according to the state of the art Information about the oil level in the designated Lines are available. This can be dependent from the filling conditions to different Switching behavior of the clutches or switching elements as well Cause switching surges.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Einrichtung zur Ansteuerung von hydraulisch ansteuerbaren Schaltelementen, insbesondere von Schaltelementen eines Automatgetriebes anzugeben, die ein gleichmäßiges und stoßfreies Schaltverhalten der Schaltelemente ermöglicht. The present invention is therefore the object based, a device for controlling hydraulically controllable switching elements, in particular from Specify switching elements of an automatic transmission, the one uniform and shock-free switching behavior of the switching elements allows.

Insbesondere soll verhindert werden, dass die Stellzylinder und Zuführleitungen vom Druckmedium leer laufen. In particular, the aim is to prevent the Run the actuating cylinder and supply lines from the print medium empty.

Diese Aufgabe wird durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst. Weitere Ausgestaltungen der Erfindung gehen aus den Unteransprüchen hervor. This task is characterized by the characteristics of the characterizing part of claim 1 solved. Further Embodiments of the invention emerge from the subclaims out.

Demnach wird vorgeschlagen, an der Entlüftung der Ventileinrichtungen der Schaltelemente ein Druckbegrenzungsventil nachzuschalten, das einen vorbestimmten, geringfügigen Druck einstellt, derart, dass die Leitungen stets befüllt bleiben. Accordingly, it is proposed to vent the Valve devices of the switching elements Downstream pressure relief valve that a predetermined, sets slight pressure, so that the lines are always stay filled.

Hierbei sind eine oder mehrere Ansteuerungen für Schaltelemente bzw. Ventileinrichtungen an das Druckbegrenzungsventil anschließbar. Here are one or more controls for Switching elements or valve devices to the Pressure relief valve can be connected.

Im Rahmen einer Variante der vorliegenden Erfindung wird vorgeschlagen, das Druckbegrenzungsventil an eine Druckleitung anzuschließen, so dass Druckmedium in die Entlüftungsleitung eingespeist werden kann. Dies ist besonders vorteilhaft, wenn an den Schaltelementen große Leckageverluste der Fall sind. Dahingegen ist die erste Variante für Situationen geeignet, bei denen die Leckage, die ein Leerlaufen der Schaltelementleitungen bewirkt, geringer ist, als die Leckage an den Ventilen bzw. Ventileinrichtungen der Schaltelemente. Within the scope of a variant of the present invention it is proposed to connect the pressure relief valve to a Connect pressure line so that pressure medium in the Vent line can be fed. This is special advantageous if large on the switching elements Leakage losses are the case. In contrast, the first variant is for Suitable situations where the leakage occurs Idling of the switching element lines causes less than the leakage at the valves or valve devices of the switching elements.

Die Erfindung kann auch bei hydraulischen Verstelleinrichtungen, beispielsweise für ein Reibradgetriebe, angewandt werden, insbesondere dann, wenn die Zylinderkolben der Verstelleinrichtung mit "Null Druck" beaufschlagbar sind. The invention can also be used in hydraulic Adjusting devices, for example for a friction gear, be used, especially when the cylinder pistons "zero pressure" can be applied to the adjusting device are.

Die Erfindung wird im folgenden anhand der beigefügten Zeichnung näher erläutert. The invention is described below with reference to the accompanying Drawing explained in more detail.

In dieser stellen dar: In this represent:

Fig. 1 eine schematische Darstellung einer ersten Ausführungsform der vorliegenden Erfindung und Fig. 1 is a schematic representation of a first embodiment of the present invention and

Fig. 2 eine schematische Darstellung einer zweiten Ausführungsform der vorliegenden Erfindung. Fig. 2 is a schematic representation of a second embodiment of the present invention.

In Fig. 1 sind zwei Schaltelemente 1, 2 gezeigt, die über Ventileinrichtungen 3 über eine Systemdruckleitung mit Systemdruck versorgt werden. Des weiteren sind zur Ansteuerung der Schaltelemente Ansteuerleitungen 4 vorgesehen. Erfindungsgemäß ist an den Entlüftungsleitungen 5 der Ventile bzw. Ventileinrichtungen 3 der Schaltelemente ein Druckbegrenzungsventil 6 vorgesehen, das einen vorbestimmten geringen Druck einstellt, so dass die Leitungen 5 immer befüllt bleiben. Ein typischer Wert für diesen Druck liegt in der Größenordnung von 0,3 bar. Das Druckbegrenzungsventil 6 ist mit einem Tank 8 verbunden. In Fig. 1, 2 are shown two switching elements 1, which are supplied via valve means 3 via a pressure line system with system pressure. Furthermore, control lines 4 are provided for controlling the switching elements. According to the invention, a pressure relief valve 6 is provided on the ventilation lines 5 of the valves or valve devices 3 of the switching elements, which sets a predetermined low pressure, so that the lines 5 always remain filled. A typical value for this pressure is of the order of 0.3 bar. The pressure relief valve 6 is connected to a tank 8 .

Fig. 2 zeigt die erfindungsgemäße Konstruktion für den Fall, dass die Leckageverluste der Schaltelemente groß sind. Dies ist insbesondere der Fall, wenn die Leckage an den Leitungen größer ist als die Leckage an den Ventileinrichtungen 3 der Schaltelemente 1, 2. In einem derartigen Fall ist das Druckbegrenzungsventil 6 an einer Druckleitung 7 angeschlossen, um somit bei Bedarf Druckmedium in die Entlüftungsleitungen 5 einzuspeisen. Das Druckbegrenzungsventil 6 ist ferner mit einem Tank 8 verbunden. Fig. 2 shows the construction according to the invention in the event that the leakage losses of the switching elements are large. This is particularly the case if the leakage on the lines is greater than the leakage on the valve devices 3 of the switching elements 1 , 2 . In such a case, the pressure relief valve 6 is connected to a pressure line 7 so that pressure medium can be fed into the ventilation lines 5 if necessary. The pressure relief valve 6 is also connected to a tank 8 .

Hierbei muss der Druck in der mit dem Druckbegrenzungsventil verbundenen Druckleitung nicht dem Systemdruck entsprechen. The pressure in the with the Pressure relief valve connected pressure line not the system pressure correspond.

Mittels der vorliegenden Erfindung wird mit geringem Bauaufwand und niedrigen Herstellungskosten und bei einer gleichzeitigen Erhöhung des Fahrkomforts ein weitestgehend optimales Schaltverhalten gewährleistet. Bezugszeichen 1 Schaltelement
2 Schaltelement
3 Ventileinrichtung
4 Ansteuerleitung
5 Entlüftungsleitung
6 Druckbegrenzungsventil
7 Druckleitung
8 Tank
By means of the present invention, a largely optimal switching behavior is ensured with little construction effort and low manufacturing costs and with a simultaneous increase in driving comfort. Reference numeral 1 switching element
2 switching element
3 valve device
4 control line
5 vent line
6 pressure relief valve
7 pressure line
8 tank

Claims (3)

1. Einrichtung zur Ansteuerung von hydraulisch ansteuerbaren Schaltelementen, insbesondere von Schaltelementen eines Automatgetriebes, mit mindestens einer Ventileinrichtung (3), die mit mindestens einem Schaltelement (1, 2) verbunden ist, wobei die mindestens eine Ventileinrichtung (3) mit einer Systemdruckleitung, einer Ansteuerleitung (4) und einer Entlüftungsleitung (5) verbunden ist, dadurch gekennzeichnet, dass an der Entlüftungsleitung (5) der mindestens einen Ventileinrichtung (3) der Schaltelemente (1, 2) ein Druckbegrenzungsventil (6) vorgesehen ist, das einen vorbestimmten geringen Druck einstellt, so dass die Leitungen immer befüllt bleiben. 1. Device for controlling hydraulically controllable switching elements, in particular switching elements of an automatic transmission, with at least one valve device ( 3 ) which is connected to at least one switching element ( 1 , 2 ), the at least one valve device ( 3 ) with a system pressure line, one Control line ( 4 ) and a ventilation line ( 5 ) is connected, characterized in that a pressure limiting valve ( 6 ) is provided on the ventilation line ( 5 ) of the at least one valve device ( 3 ) of the switching elements ( 1 , 2 ), which has a predetermined low pressure sets so that the lines always remain filled. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Druckbegrenzungsventil (6) an einer Druckleitung (7) angeschlossen ist, wobei in die Entlüftungsleitungen (5) Druckmedium einspeisbar ist. 2. Device according to claim 1, characterized in that the pressure relief valve ( 6 ) is connected to a pressure line ( 7 ), wherein pressure medium can be fed into the ventilation lines ( 5 ). 3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass an das Druckbegrenzungsventil (6) eine oder mehrere Ventileinrichtungen (3) für Schaltelemente (1, 2) anschließbar sind. 3. Device according to claim 1 or 2, characterized in that one or more valve devices ( 3 ) for switching elements ( 1 , 2 ) can be connected to the pressure relief valve ( 6 ).
DE2001151751 2001-10-19 2001-10-19 Device for controlling hydraulically controllable shift elements for automatic gearbox has pressure restricting valve on release line of valve device setting low pressure to ensure pipes remain filled Ceased DE10151751A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2001151751 DE10151751A1 (en) 2001-10-19 2001-10-19 Device for controlling hydraulically controllable shift elements for automatic gearbox has pressure restricting valve on release line of valve device setting low pressure to ensure pipes remain filled

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2001151751 DE10151751A1 (en) 2001-10-19 2001-10-19 Device for controlling hydraulically controllable shift elements for automatic gearbox has pressure restricting valve on release line of valve device setting low pressure to ensure pipes remain filled

Publications (1)

Publication Number Publication Date
DE10151751A1 true DE10151751A1 (en) 2003-05-08

Family

ID=7703106

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2001151751 Ceased DE10151751A1 (en) 2001-10-19 2001-10-19 Device for controlling hydraulically controllable shift elements for automatic gearbox has pressure restricting valve on release line of valve device setting low pressure to ensure pipes remain filled

Country Status (1)

Country Link
DE (1) DE10151751A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023067018A1 (en) * 2021-10-20 2023-04-27 Zf Friedrichshafen Ag Hydraulic controller for a motor vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323158A1 (en) * 1982-07-03 1984-01-05 Honda Giken Kogyo K.K., Tokyo WARM-UP ACCELERATION FOR AUTOMATIC TRANSMISSION
DE4120447A1 (en) * 1991-06-20 1992-12-24 Linde Ag Automatic vent for hydraulic system - has pressure limiting valve in regulating unit control area with set opening pressure corresponding to hydraulic pressure required for unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323158A1 (en) * 1982-07-03 1984-01-05 Honda Giken Kogyo K.K., Tokyo WARM-UP ACCELERATION FOR AUTOMATIC TRANSMISSION
DE4120447A1 (en) * 1991-06-20 1992-12-24 Linde Ag Automatic vent for hydraulic system - has pressure limiting valve in regulating unit control area with set opening pressure corresponding to hydraulic pressure required for unit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EBERTSHÄUSER,H.: Fluidtechnik von A bis Z, Vereinigte Fachverlage, Krausskopf/Ingenieur-Digest, Mainz, 1989, S.374 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023067018A1 (en) * 2021-10-20 2023-04-27 Zf Friedrichshafen Ag Hydraulic controller for a motor vehicle
DE102021211810B4 (en) 2021-10-20 2023-08-31 Zf Friedrichshafen Ag Hydraulic control device for a motor vehicle

Similar Documents

Publication Publication Date Title
DE102005032103B4 (en) Control valve for a torque-transmitting mechanism and method for engaging the torque-transmitting mechanism
EP3017214B1 (en) Hydraulic control arrangement for an automatic transmission
EP2151586A2 (en) Hydraulic circuit
DE2025811A1 (en) Hydraulic control system for self-switching transmission systems
DE102006003517A1 (en) Hydraulic control device for triggering a double clutch, especially in an automatic double-clutch gearbox or in a hybrid drive system has actuators, a proportional valve and distributing valves
DE102006030141A1 (en) Pressure supply unit for hydraulic systems comprises electric motor which feeds fluid to two cylinders via pipes fitted with non-return valves, cylinders also being fitted with return flow pipes each of which also has non-return valve
DE102007023072B4 (en) Hydraulic control device for a transmission
DE102009054541B4 (en) Actuating device for a shifting element of a transmission device that can be subjected to hydraulic actuating pressure
DE102006059072A1 (en) Device and method for actuating a clutch
DE102018208755A1 (en) Pressure control valve
DE10065609B4 (en) Manually operated valve of a hydraulic pressure control system for an automatic transmission
DE102013209932A1 (en) Hydraulic actuator of a transmission
DE102011085333A1 (en) hydraulic system
DE102016216264A1 (en) Fluid arrangement for actuating vehicle components
DE10151751A1 (en) Device for controlling hydraulically controllable shift elements for automatic gearbox has pressure restricting valve on release line of valve device setting low pressure to ensure pipes remain filled
DE19735820B4 (en) Switching device of a change gear with pressure control valves for the working pressure and a supply pressure
DE102020004389A1 (en) Hydraulic system for a dual clutch transmission
DE102019114627A1 (en) HYDRAULIC CONTROL SYSTEM FOR A CONTINUOUSLY GEARBOX
DE102013223545A1 (en) Hydraulic control
DE102011077649A1 (en) Hydraulic controller for ship transmission, has extension ports to connect hydraulic controller with modulation module and connected with clutch port and exhaust port, respectively, where controller forms base controller for shifting clutch
DE10320776B4 (en) Device for compensating viscous properties of a hydraulic medium in a hydraulic pressure line
DE102015204816A1 (en) Transmission device with at least one fluidically actuated switching element
DE10313488B4 (en) Gearshift valve for a shiftable transmission
DE102009025688A1 (en) Transmission device i.e. motor vehicle transmission device, has pressure supply system with operating unit pressure, which is derived from working pressure system, and provided in operating state for supplying pressure to transducer
EP0855540B1 (en) Gear change device for automation of manual gearboxes, especially for motor vehicles

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
8131 Rejection