DE1650607A1 - Pressure control device - Google Patents

Pressure control device

Info

Publication number
DE1650607A1
DE1650607A1 DE19671650607 DE1650607A DE1650607A1 DE 1650607 A1 DE1650607 A1 DE 1650607A1 DE 19671650607 DE19671650607 DE 19671650607 DE 1650607 A DE1650607 A DE 1650607A DE 1650607 A1 DE1650607 A1 DE 1650607A1
Authority
DE
Germany
Prior art keywords
pressure
pressure control
control valve
line
pressure medium
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.)
Pending
Application number
DE19671650607
Other languages
German (de)
Inventor
Fritz Leber
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
Publication of DE1650607A1 publication Critical patent/DE1650607A1/en
Pending legal-status Critical Current

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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
    • B60T13/18—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs with control of pump output delivery, e.g. by distributor valves
    • 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
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30585—Assemblies of multiple valves having a single valve for multiple 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
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • 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
    • F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing 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
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control 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
    • F15B2211/55—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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2708/00—Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes
    • F16H2708/02—Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes only the toothed wheels remain engaged
    • F16H2708/06—Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes only the toothed wheels remain engaged the control being hydraulic or pneumatic

Description

650607650607

ZAHNRADMBRIK I1RIEDRICIiSHAPEN Aktiengesellschaft FriedrichshafenGEARMBRIK I 1 RIEDRICIiSHAPEN Aktiengesellschaft Friedrichshafen

DrucksteuereinrichtungPressure control device

D-ie Erfindung bezieht sich "auf eine Einrichtung zur Steuerung von durch Druckmittel betätigbaren Kupplungen, Bremsen od. ähnl. Aggregaten eines Getriebes mit einem in der Druckmittelzuführungsleitung eingesetzten, den Kupplungen zugeordneten Gangwählschieber od. dgl. und einem der Druckmittelquelle nachgeschalteten Druckregelventil und betrifft Maßnahmen zur ¥ereinfachung des Aufbaues und des Betriebsverhaltens derartiger Drucksteuereinrichtungen.The invention relates "to a device for controlling of clutches, brakes or similar that can be actuated by pressure medium. Units of a transmission with one in the pressure medium supply line used gear selector slider or the like assigned to the clutches and one downstream of the pressure medium source Pressure control valve and relates to measures to simplify the structure and operating behavior of such Pressure control devices.

Bei den bisher bekannten vergleichbaren Steuereinrichtungen ist jeder der hydraulisch betätigbaren Kupplungen eines Getriebes ein zwischen dieser und dem Gangwählschieber eingesetztes Drucksteuerventil zugeordnet, das aus 2 oder mehreren ineinandergelagerten Steuerkolben besteht und mittels dem der Druckaufbau in dem Druckraum der Kupplung gesteuert werden kann. Die Betätigung der Ventile erfolgt hierbei unmittelbarIn the previously known comparable control devices, each of the hydraulically actuatable clutches is one Transmission assigned a pressure control valve inserted between this and the gear selector slide, which consists of 2 or more there is nested control piston and by means of which the pressure build-up in the pressure chamber of the clutch can be controlled can. The valves are operated immediately

009844/0674 m/t 009844/0674 m / t

in Abhängigkeit von dem Gangwählscliieber,, wobei bei einem Gangwechsel das der jeweiligen Kupplung zugeördneteif Ventil von dem Druckmittel beaufschlagt wird t während von den anderen Ventilen selbsttätig der Rückfluß freigegeben wird. Diese ¥entilausführungen haben sich zwar vielfach bewährt, der Aufwand^ der hierbei erforderlich ist, ist jedoch erheblich, da in der DruckmittelzuführuBgsleitung jeder Kupplung ein Ventil eingeschaltet werden muß. Auch wird; auf Grund der Vielzahl der verwendeten Ventile die Gefahr einer Betriebsstörung erheblich erhöht.depending on the Gangwählscliieber ,, wherein during a gear change, the clutch of the respective zugeördneteif valve is acted upon by the pressure medium during the reflux t is released automatically from the other valves. Although these valve designs have proven themselves many times over, the effort involved is considerable, since a valve must be switched on in the pressure medium supply line of each clutch. Also will; Due to the large number of valves used, the risk of a malfunction increases considerably.

Aufgabe der Erfindung ist es daher, eine Drucksteuereinrichtung der vorgenannten Art für die Kupplungen eines Getriebes zu schaffen, die einfach in ihrem Aufbau und vor allem äußerst betriebssicher ist. Q^mäß der Erfindung wird ", dies dadurch erreicht, daß in der Bruckmittelzuführungslei-. tung zwischen dem Druckregelventil und dem Wählschieber ein mit einem gegen Druckkraft, beispielsweise gegen die Kraft einer Feder, axial verschiebbarer Steuerkolben versehenes Drucksteuerventil eingesetzt ist, dessen Kolben von dem Druckmittel auf einer Stirnfläche entgegen der Kraft der Ventilfeder über eine an die Druekmitteileitung zwischen dem Drucksteuerventil und dem Wählschieber angeschlossenen Zweig- ι leitung beaufschlagbar ist und daß die Ein- und Auslaßleitung des Drucksteuerventils über eine mit einer Drosselstelle od. dgl., beispielsweise in Form einer Blende, versehenen Neben-The object of the invention is therefore to create a pressure control device of the aforementioned type for the clutches of a transmission which is simple in its construction and, above all, extremely reliable. According to the invention, this is achieved in that a pressure control valve provided with a control piston axially displaceable against pressure force, for example against the force of a spring, is inserted in the Bruckmittelzuführungslei-. Line between the pressure control valve and the selector slide, the piston of which is provided by the ι pressure medium on one end face against the force of the valve spring via a connected to the Druekmitteileitung between the pressure control valve and the manual valve branch is line acted upon, and that the inlet and outlet conduit of the pressure control valve od a with a throttle point. the like., for example in the form of a Cover, provided secondary

009844/0674 "·/-009844/0674 "· / -

leitung miteinander verbunden sind.line are connected to each other.

: Eine gemäß ;der Erfindung ausgebildete'Brücksteuereinrichtung zeichnet sich nicht nur durch einen einfachen Aufbau des Drucksteuerventils und dessen hoher Betriebssicherheit aus, vielmehr wird durch die vorschlagsgemäß vorgesehene Anordnung des Ventil8 zwischen dem Bruckregelventil und dem Gangwählschieber erreicht» daß ein durch hydraulisch betätigbero-Kupplungen schaltbares Getriebe jeweils mit nur einem Drucksteuerventil auszustatten ist. Der Bauaufwand und die Störanfälligkeit der Anlage wird somit gegenüber den vorbekannten Ausführungen erheblich vermindert t da durch das allen Kupplungen gemeinsame Ventil, das nur miteinem Koloen versehen ist^ selbsttätig alle Steuervorgänge ausgeführt werden. : A according to; the invention ausgebildete'Brücksteuereinrichtung is distinguished not only by a simple construction of the pressure control valve and its high reliability, but is achieved by the proposal provided in accordance with arrangement of the V e ntil8 between the Bruck control valve and the Gangwählschieber "that a betätigbero- by hydraulically Couplings switchable gearbox is to be equipped with only one pressure control valve. The construction costs and the susceptibility of the system is thus greatly reduced over the prior art designs because t by all clutches common valve, is provided only with a Koloen ^ automatically all the control operations are performed.

Weitere Einzelheiten sind dem in der Zeichnung schematich dargestellten Ausführungsbeispiel einer gemäß der Erfindung ausgebildeten Drucksteueranlage zu entnehmen«Further details are schematich in the drawing illustrated embodiment of one according to the invention to be taken from trained pressure control system «

Die mit \ bezeichnete Einrichtung zur Steuerung von durch Druckmittel betätigbaren Kupplungen eines Getriebes besteht im wesentlichen in dem dargestellten Ausführungsbeispiel aus einem Druckregelventil 3$ dem G-angwählschieber 4- sowie einem zwischen diesen angeordneten Druckregelventil 2. Zur Zuführung des Druckmittels dient eine Pumpe 5, durch die dieses über ei-The device labeled \ for controlling clutches of a transmission that can be actuated by pressure medium consists essentially in the illustrated embodiment of a pressure control valve 3 $ the G-angwählschieber 4- and a pressure control valve 2 arranged between them. A pump 5 is used to supply the pressure medium which this over a

009844/067^ ir 009844/067 ^ ir

BAD ORIGINALBATH ORIGINAL

ne Saugleitung 7 aus einem Sammelbehälter 6 angesaugt und über einen Filter 8 in die Druckmittelleitungen 16 und 16· gefördert wird. . .""; -" -".-'. '-..,"ne suction line 7 sucked from a collecting container 6 and over a filter 8 in the pressure medium lines 16 and 16 · conveyed will. . . ""; - "-" .- '. '- .., "

Das dem-Drucksteuerventil 2 vorgeschaltete Druckregelventil 3" ist aus einem in einem Gehäuse 9 eingesetzten Kolben 10 ge-*4 bildet, auf dessen eine Stirnfläche 12 über eine Drosselbohrung 11 das Druckmittel einwirkt, während sich auf der anderen Stirn-13 und dem Gehäuse 9 eine Feder H abstützt. Sobald der auf die Stirnfläche 12 ausgeübte Druck die Kraft der Feder 14 übersteigt, wird der Kolben 10nach rechts verschoben, und das -Druckmittel kann über die' Leitung 15 in; den Sammelbehälter 6 zurückfliessen.. Durch das Ventil 3 wird -somit der Druck des Druckmittels in der Leitung 16 in Abhängigkeit von der einstellbaren Vorspannung der Feder 14 selbsttätig auf einem vorbestimmten Druckwert geregelt. . ;- . .The the pressure control valve 2 upstream of the pressure control valve 3 'is overall of a set in a housing 9 pistons 10 * 4 forms, on the one end face 12 through a throttle bore 11 acts the pressure fluid, while on the other end 13 and the housing 9 a spring H. As soon as the pressure exerted on the end face 12 exceeds the force of the spring 14, the piston 10 is displaced to the right and the pressure medium can flow back into the collecting container 6 via the line 15 So that the pressure of the pressure medium in the line 16 is automatically regulated to a predetermined pressure value as a function of the adjustable preload of the spring 14.

Das Drucksteuerventil 2 ist ebenfalls aus einem in einem Gehäuse 17 eingesetzten, mit einem Ringraum 21 versehenen Kolben 18 gebildet, dessen Stirnfläche 19 von Druckmittel, das über eine Zweigleitung 23 zugeführt wird, entgegen der Kraft einer auf die Stirnfläche 20 einwirkenden Feder 32 beaufschlagt wird. Durch Verschieben des Kolbens 18 nach links kann die Auslaßleitung 22 verschlossen werden. Ferner ist das Drucksteuerventil 2 mit einer Zweigleitung 24 ausgestattet, mittels der über eine Drosselstelle 25.die Druckmittelzuführungsleitung 16 mit der Leitung 16' ständig verbunden ist.The pressure control valve 2 is also made of one in one Housing 17 used, provided with an annular space 21 piston 18 is formed, the end face 19 of pressure medium, the over a branch line 23 is supplied, against the force a spring 32 acting on the end face 20 is acted upon. By moving the piston 18 to the left, the outlet line 22 are closed. Furthermore, the pressure control valve 2 is equipped with a branch line 24, by means of which a Throttle point 25. the pressure medium supply line 16 with the Line 16 'is constantly connected.

009844/0674009844/0674

Das in der Leitung 16' beförderte■Druckmittel strömt dem Gangwählschieber 4 zu» mittels dessen Verstellhebel 26 die Zufuhr über eine der Leitungen 27, 28, 29 oder 30 zu einer der mit I, II, III und I? bezeichneten*Kupplungen in der jeweils gewünschten Weise gesteuert werden kann. Über die Leitung 31 kann das Druckmittel aus den nicht beaufschlagten Kupplungen in den Sammelbehälter 6 wieder zurückfliessen.The pressure medium conveyed in line 16 'flows into the Gear selector slide 4 to »by means of its adjusting lever 26, the supply via one of the lines 27, 28, 29 or 30 to one of the with I, II, III and I? designated * couplings in each can be controlled as desired. Via line 31 the pressure medium can flow back into the collecting container 6 from the clutches that are not acted upon.

Soll mittels des Verstellhebels 26 des Gangwählschiebers 4 eine Gangumschaltung vorgenommen werden, in dem beispiels- 1^ weise Druckmittel von der Kupplung II zu der Kupplung III geleitet wird, so wird während des Umschaltvorganges der Druck in der Leitung 16! stark abfallen. Dadurch wird der Kolben 18 des Drucksteuerventils 2, da auf die Stirnfläche 19 durch das Druckmittel keine Kraft ausgeübt wird, durch die. Feder 32 in die dargestellte Lage verschoben, so daß das Druckmittel über den Ringraum 21 ungehindert in den Druckraum der Kupplung III einströmen und sich dort rasch Druck aufbauen kann.During the switching is to be made by means of the adjusting lever 26 of the Gangwählschiebers 4 is a gear change in which beispiels- 1 ^ as pressure medium from the coupling II III led to the clutch, the pressure in the line 16 is! drop off sharply. As a result, the piston 18 of the pressure control valve 2, since no force is exerted on the end face 19 by the pressure medium, by the. Spring 32 is moved into the position shown so that the pressure medium can flow unhindered through the annular space 21 into the pressure space of clutch III and pressure can build up there quickly.

Sobald die durch den sich aufbauenden Druck auf den Kolben 18 ausgeübte Kraft größer ist als die Kraft der feder 32, wird der Kolben 18 nach links verschoben, und es wird die Auslassöffnung 22 verschlossen". Der Druckanstieg in der neugeschalteten Kupplung III wird in diesem Betriebszustand durch das durch.die Drossel 25 strömende Druckmittel gesteuert, das eine weitere Verschiebung des Kolbens 18 bewirkt und über die Nebenleitung 23 den freiwerdenden Zylinderraum ausfüllt, Ist der KoI- As soon as the force exerted on piston 18 by the pressure building up is greater than the force of spring 32, the piston 18 is moved to the left, and it becomes the outlet port 22 closed ". The pressure increase in the newly switched Clutch III is in this operating state by the durch.die throttle 25 controlled flowing pressure medium, the one causes further displacement of the piston 18 and fills the vacated cylinder space via the secondary line 23, If the piston

009844/0674 ,009844/0674,

ben 18 in der linken Undstellung, steigt der Druck wie .in der ersten Phase wiederum sehr rasch anr da in dem Drucksteuerventil 2 keine Yolumensvergrößerung vorgenommen wird. Durch das Druckregelventil 3 wird hierbei verhindert, daß der Druck in dem hydraulischen Kreislauf über einem vorbestimmten Wert ansteigt.ben 18 in the left Undstellung, the pressure rises no Yolumensvergrößerung as .in the first phase again very rapidly r as in the pressure control valve 2 is made. The pressure regulating valve 3 prevents the pressure in the hydraulic circuit from rising above a predetermined value.

Akte 4802File 4802

009844/0874009844/0874

Claims (1)

Pat e η t a η a ρ r u cPat e η t a η a ρ r u c Einrichtung zur Steuerung von durch Druckmittel betätigbaren Kupplungen^ Bremsen od. äfanl. Aggregaten mit einem in der Druckmittelzuführungsleitung eingesetzten, den Kupplungen zugeordneten Wählschieber od* dgl. und einem der Druckmittel-Quelle nachgeschalteten Eruckregelventil, dadurch gekannzeich'-net, daß in der Bruckniittelzuführungsleitung (16) zwischen dem Dr u akregel ventil (3) und dem fählschieber (4) ein mit einem gegen Druckkraft» beispielsweise gegen die Eraf.t einer Feder (32) axial verschiebbarer Steuerkolbeh (18) versehenes Drucksteuer= ventil (2) eingesetzt ist» dessen Kolben(18) von dem Druckmittel auf einer Stirnfläche (19) entgegen der Kraft der Ventilfeder (32) über eine an die Druckmittelleitung (16) zwisofcan dem Drucksteuerventil (2) und dem Wählschieber (4) angeschloraenen Zweigleitung (23) beaufschlagbar ist und daß die Ein- u?i Auslaßleitung (16, 16r) des Drucksteuerventils (2) über eine *ait einer Drosselstelle (25) od. dgl., beispielsweise in Form einer Blende, versehenen Kebenleitung (24) miteinander verbunden sindDevice for controlling clutches that can be actuated by pressure medium, brakes, etc. Units with a selector valve or the like used in the pressure medium supply line and assigned to the clutches and a pressure control valve downstream of the pressure medium source, characterized in that in the pressure medium supply line (16) between the pressure control valve (3) and the dial valve (4) a pressure control valve (2) provided with a pressure control valve (2) which is provided with a pressure control valve (2) which can be axially displaced against the pressure force »for example against the Eraf. against the force of the valve spring (32) can be acted upon by a branch line (23) connected to the pressure medium line (16) between the pressure control valve (2) and the selector slide (4) and that the inlet and outlet line (16, 16 r ) of the pressure control valve (2) via a secondary line (24) provided with a throttle point (25) or the like, for example in the form of a diaphragm '. 9/1 '. 9/1 7. 9/ 1967 Akte 48027. 9/1967 Act 4802 M^&fi7 4 BAD ORtGlNAUM ^ & fi7 4 BAD ORtGlNAU ■■· , % f ^- 'ir ■■ · , % f ^ - 'ir Leersei teBlank page
DE19671650607 1967-09-12 1967-09-12 Pressure control device Pending DE1650607A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ0013047 1967-09-12

Publications (1)

Publication Number Publication Date
DE1650607A1 true DE1650607A1 (en) 1970-10-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19671650607 Pending DE1650607A1 (en) 1967-09-12 1967-09-12 Pressure control device

Country Status (6)

Country Link
BE (1) BE720735A (en)
CS (1) CS149636B2 (en)
DE (1) DE1650607A1 (en)
FR (1) FR1582295A (en)
GB (1) GB1221119A (en)
SE (1) SE331430B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946760A (en) * 1971-07-08 1976-03-30 Aisin Seiki Kabushiki Kaisha Hydraulic modulator valve
US4006805A (en) * 1975-06-30 1977-02-08 Clark Equipment Company Clutches with bypass inching valve
US4085834A (en) * 1976-08-02 1978-04-25 Allis-Chalmers Corporation Valve assembly for power shift transmission
DE2919206A1 (en) * 1979-05-12 1980-11-20 Bosch Gmbh Robert DEVICE FOR CONTROLLING A HYDRAULIC CONSUMER

Also Published As

Publication number Publication date
SE331430B (en) 1970-12-21
BE720735A (en) 1969-02-17
CS149636B2 (en) 1973-07-25
FR1582295A (en) 1969-09-26
GB1221119A (en) 1971-02-03

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SH Request for examination between 03.10.1968 and 22.04.1971