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WO2014019868A1 - Valve of a storage device having an opening means - Google Patents

Valve of a storage device having an opening means Download PDF

Info

Publication number
WO2014019868A1
WO2014019868A1 PCT/EP2013/065197 EP2013065197W WO2014019868A1 WO 2014019868 A1 WO2014019868 A1 WO 2014019868A1 EP 2013065197 W EP2013065197 W EP 2013065197W WO 2014019868 A1 WO2014019868 A1 WO 2014019868A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
opening means
spring element
piston
storage
Prior art date
Application number
PCT/EP2013/065197
Other languages
German (de)
French (fr)
Inventor
Dietmar Kratzer
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to CN201380040980.1A priority Critical patent/CN104507769B/en
Publication of WO2014019868A1 publication Critical patent/WO2014019868A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T13/00Transmitting 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
    • B60T13/10Transmitting 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
    • B60T13/12Transmitting 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
    • B60T13/14Transmitting 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 accumulators or reservoirs fed by pumps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T17/00Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18Safety devices; Monitoring
    • B60T17/22Devices for monitoring or checking brake systems; Signal devices
    • B60T17/226Devices for monitoring or checking brake systems; Signal devices using devices being responsive to the difference between the fluid pressions in conduits of multiple braking systems
    • B60T17/227With additional functions, e.g. by-pass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T8/00Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3675Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
    • B60T8/368Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T8/00Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/48Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0406Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of balls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/042Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with locking or disconnecting arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1221Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded

Definitions

  • the invention relates to a valve of a storage device which is formed with a storage cylinder and a storage piston guided therein.
  • the valve includes a valve sealing body for selectively opening and closing a valve opening on a valve seat and an opening means for selectively lifting the valve sealing body from the valve seat.
  • Generic storage devices are used in particular in vehicle brake systems and serve to temporarily store pressure fluid in the form of brake fluid.
  • the pressure medium is returned from wheel brake cylinders or supplied from a main memory of the vehicle brake system, for example in vehicle brake systems with anti-lock braking system (ABS) and Electronic Stability Program (ESP).
  • ABS anti-lock braking system
  • ESP Electronic Stability Program
  • Valves in storage devices of hydraulic units, particularly vehicle brake systems, are used to control the amount of pressure fluid within the associated storage device.
  • the storage devices comprise a storage cylinder and a storage piston guided therein, with which a storage volume for the pressure medium is delimited. From the storage volume, the pressure medium can be promoted when needed in a brake circuit. If the storage volume decreases, the accumulator piston moves so deeply into the storage cylinder that it opens a spring-assisted closed valve with an opening means. Pressure fluid then flows into the cylinder again through the opened valve.
  • Conventionally used opening means are designed as a pin, which fits accurately into the storage piston used, in particular pressed. Precisely fitting production is necessary because the opening means for lifting the valve sealing body has to hit it correctly. As a rule, the pin-shaped opening means is guided from the piston side through the valve opening to the valve sealing body.
  • a valve of a storage device which is formed with a storage cylinder and a storage piston guided therein.
  • the valve is provided with a valve sealing body for selectively opening and closing a valve port on a valve seat. Furthermore, the valve has an opening means for selectively lifting the valve sealing body from the valve seat.
  • the opening means is held with a spring element or resilient.
  • the spring element With the resilient properties of the spring element, this deforms when a force is exerted and, when the attacking force ceases, returns to its original shape.
  • the spring element at the same time holds the opening means on the valve sealing body in position.
  • the spring element thus enables a location-accurate and at the same time robust positioning of the opening means.
  • there is defined freedom of movement for the opening means so that it can lift the valve sealing body from the valve seat if necessary.
  • the opening means is particularly simple and inexpensive precisely positioned.
  • the opening means on the spring element is sufficiently movable to be moved with a movement of the piston of this and pushed against the valve sealing body.
  • the opening means with the associated spring element is preferably simply inserted and clipped onto the storage device. Clipped-.
  • the spring element is inexpensive to manufacture together with the opening means as a comparatively small precision part.
  • the opening means with the spring element is further designed as a single part, which is advantageously prefabricated and held with little effort by means of the spring element frictionally and / or positively on the storage device.
  • the opening means is held with the spring element on the storage cylinder or cylinder.
  • the opening means is held on each component, against which the valve closing body at least indirectly abuts against its valve seat. Therefore, the relative position between these components is then particularly precise. Furthermore, the opening means can be easily mounted by simply clipping on the cylinder.
  • the opening means is advantageously held with the spring element on the storage piston or piston. There, too, a simple clip assembly is possible.
  • a particularly precise positioning of the invention held opening means is possible by the associated spring element directly on the valve seat forming member, in particular a valve seat body, is arranged.
  • the spring element of this type can then be dimensioned particularly small together with the opening means.
  • a one-piece design of the spring element together with the component forming the valve seat is also advantageous.
  • the high strength of spring steel for the valve seat and / or be used the valve sealing body With such a "combination part" and the surrounding pump housing can be designed to be particularly small.
  • the opening means is preferably designed with a pin element for engaging, in particular for slightly eccentric engagement on the valve sealing body.
  • a pin as opening means can advantageously pass through the valve opening, in order then to attack on the one hand the valve sealing body and on the other hand to be actuated by the accumulator piston.
  • the end of the pin facing the valve sealing body can be specially adapted for this purpose, in particular with an inclined contact surface, so that the valve sealing body is not deformed on its surface when the opening means are hit.
  • the opening means preferably acts on the valve sealing body slightly eccentrically, whereby the detachment and lifting of the valve sealing body is facilitated by the valve seat. The valve sealing body is then slightly lifted asymmetrically, whereby the flow area of the valve opening is increased rapidly and more fluid per unit time can flow through.
  • the spring element according to the invention is preferably designed with a substantially radially directed rod portion.
  • This rod portion provides a resilient connection from radially outward to radially inward, and in this way can very easily hold a rod-shaped opening means in the center of an otherwise circular-cylindrical cylinder-piston arrangement.
  • There in the center can be advantageously arranged the valve opening, whereby a symmetrical and largely laminar flow through the valve according to the invention can be achieved.
  • the spring element can be designed very inexpensively as a simple spring wire. The spring wire can then also be used to produce the rod-shaped or pin-shaped opening means.
  • the spring element is preferably designed with an annular holding portion.
  • This holding section can form a spring ring with a spring wire, which is turned in particular at its end portion radially inwards.
  • the invention is accordingly further directed to a use of such a valve according to the invention in a storage device, in particular for a hydraulic unit of a vehicle brake system, in which in particular the accumulator piston is designed with an axial bulge facing the opening means.
  • a storage device in particular for a hydraulic unit of a vehicle brake system
  • the accumulator piston is designed with an axial bulge facing the opening means.
  • the opening means is mounted on the storage cylinder or on the valve seat body.
  • the piston end face facing the opening means is designed with its bulge at least approximately spherical segment-shaped.
  • the center of the ball portion is advantageously that point about which the accumulator piston within the storage cylinder can slightly rotate or pivot when deviating from its theoretically linear motion. The such offset of the accumulator piston in the storage cylinder has then largely no effect on the operation of the opening means.
  • FIG. 1 shows a part of a hydraulic circuit diagram of a vehicle brake system with a storage device according to the prior art
  • FIG. 3 shows a longitudinal section of a memory device according to FIG. 1, FIG.
  • FIG. 4 is a perspective view of a first embodiment of a spring element for a storage device according to the invention.
  • FIG. 5 is a perspective view of a second embodiment of a spring element for a storage device according to the invention.
  • Fig. 6 is a longitudinal section of a first embodiment of a memory device with a spring element according to the invention.
  • Fig. 7 is a longitudinal section of a second embodiment of a storage device with a spring element according to the invention.
  • a vehicle brake system 10 is illustrated, which comprises an actuatable by a driver of an associated four-wheeled vehicle brake pedal 12.
  • the brake pedal 12 acts on a brake booster 14, by means of which pressure on a fluid in the form of brake fluid can be generated at an associated master cylinder 16.
  • the master cylinder 16 is connected to various fluid lines 18, with which in particular a switching valve 20, a pump element 22 with associated drive motor 24, an inlet valve 26 for the left rear, an inlet valve 28 for the right front, a left outlet valve 30, an outlet valve 32 for right front and a brake cylinder 34 for the left rear and a brake cylinder 36 for right front are optionally fluid-conductively connected together. Furthermore, a storage device 38 for temporarily storing brake fluid is connected in the fluid lines 18.
  • the memory device 38 is illustrated in FIG. 2 with a coarser and in FIG. 3 with a finer schematic diagram.
  • the storage device 38 comprises a cup-shaped, circular cylindrical storage cylinder 40, in which a storage piston 42 is slidably mounted.
  • the storage piston 42 is internally sealed to the storage cylinder 40 by means of a piston piston 42 fixedly arranged piston seal 44 fluid-tight, but at the same time displaceably sealed.
  • a piston spring 46 urges the storage piston 42, which is displaceably mounted in this way, into the cup shape of the storage cylinder 40, as a result of which a pressure space for temporarily storing brake fluid under pressure is formed in its interior.
  • a valve 48 is formed thereon, by means of which brake fluid can optionally be introduced into the interior of the accumulator cylinder 40.
  • the valve 48 is actuated by means of the accumulator piston 42 when it moves far into the storage cylinder 40 and thus approaches the valve 48.
  • the valve 48 is designed with a valve sealing body 50, which is urged by means of a valve spring 52 in the direction of the accumulator piston 42 against a valve seat 54.
  • the valve seat 54 is formed on a valve seat body 56 and surrounds there a valve opening 58.
  • the valve seat body 56 may be integrally formed, in several parts with a valve seat and a valve seat carrier or integrated as an attachment in the storage cylinder 40th
  • an opening means 60 in the form of a pin is formed, which is pressed in a press fit 62 on the accumulator piston 42 opposite of the valve opening 58 and held stationary there.
  • the press fit 62 serves to position the pin-shaped opening means 60 very precisely relative to the valve sealing body 50 resting against the valve seat 54, in particular in the axial direction of the accumulator piston 42.
  • a precise positioning is required so that the accumulator piston 42 lifts the valve sealing body 50 in its movement into the accumulator piston 42 at a well-defined location of the valve seat 54 and in this way the valve 48 opens.
  • a spring element 64 is illustrated according to the invention.
  • the spring element 64 is formed of spring wire and comprises an annular, in one place open holding portion 66 and a radially inwardly projecting rod portion 68. These two portions 66 and 68 serve to hold an opening means 70 resiliently, which on the rod portion 68 in Form of an axially directed pin portion connects.
  • a bulge 71 of the spring wire facing away from the opening means 70 is formed at the transition from the rod section 68 into the pin-shaped opening means 70.
  • the pin portion protrudes, as illustrated in FIGS. 6 and 7, through the associated valve opening 58 and terminates in an obliquely oriented contact surface 72 which is intended to abut against the associated valve sealing body 50.
  • the positioning of the opening means 70 thus corresponds to that of the opening means 60 according to the prior art.
  • the opening means 70 is not rigidly arranged on another body of the storage device 38, but resilient. It can be arranged in such a way, in particular resiliently, directly or indirectly on the storage cylinder, whereby a simple and at the same time precise positioning relative to the valve sealing body is possible.
  • FIG. 6 illustrates an exemplary embodiment in which the spring element 64 with its holding section 66 is clip-in on the inside of the storage cylinder 40 and in this way is mounted there in a stationary manner.
  • 7 shows an embodiment in which the spring element 64 with its annular retaining Section 66 is supported on a correspondingly shaped valve seat body 56 and thus in the immediate vicinity of the valve seat 54.
  • the opening means 70 resiliently held on the storage cylinder 40 or on the valve seat body 56 is moved by means of the accumulator piston 42 against the valve sealing body 50 in order to be able to lift it off the valve seat 54 as already explained above.
  • a bulge 76 is formed centrally on a piston end face 74 facing the spring element 64, with which the storage piston 42 abuts during its movement into the storage cylinder 40.
  • the bulge 76 is designed in the form of a spherical section and has a
  • Radius 78 which is selected such that the storage piston 42 pivots at a slight pivoting within the storage cylinder 40 to the center 80 from which the radius 78 starts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Safety Valves (AREA)
  • Check Valves (AREA)
  • Lift Valve (AREA)

Abstract

The invention relates to a valve (48) of a storage device (38), which storage device has a storage cylinder (40) and a storage piston (42) guided therein, and is provided with a valve sealing body (50) for optionally opening and closing a valve opening (58) on a valve seat (54) and an opening means (70) for optionally lifting the valve sealing body (50) from the valve seat (54), wherein the opening means (70) is retained by means of a spring element (64).

Description

Beschreibung  description
Titel title
Ventil einer Speichereinrichtung mit einem Öffnungsmittel Stand der Technik  Valve of a storage device with an opening means prior art
Die Erfindung betrifft ein Ventil einer Speichereinrichtung, die mit einem Speicherzylinder und einem darin geführten Speicherkolben gebildet ist. Das Ventil umfasst einen Ventildichtkörper zum wahlweisen Öffnen und Verschließen einer Ventilöffnung an einem Ventilsitz und ein Öffnungsmittel zum wahlweisen Abheben des Ventildichtkörpers von dem Ventilsitz. The invention relates to a valve of a storage device which is formed with a storage cylinder and a storage piston guided therein. The valve includes a valve sealing body for selectively opening and closing a valve opening on a valve seat and an opening means for selectively lifting the valve sealing body from the valve seat.
Gattungsgemäße Speichereinrichtungen werden insbesondere bei Fahrzeugbremsanlagen verwendet und dienen dazu, Druckmittel in Form von Bremsfluid zwischenzuspeichern. Das Druckmittel wird dabei aus Radbremszylindern rückgeführt oder aus einem Hauptspeicher der Fahrzeugbremsanlage zugeführt, beispielsweise bei Fahrzeugbremsanlagen mit Antiblockiersystem (ABS) und Elektronischem Stabilitäts-Programm (ESP). Ventile in Speichereinrichtungen von Hydraulikeinheiten, insbesondere von Fahrzeugbremsanlagen, werden verwendet, um die Menge an Druckmittel innerhalb der zugehörigen Speichereinrichtung zu steuern. Generic storage devices are used in particular in vehicle brake systems and serve to temporarily store pressure fluid in the form of brake fluid. The pressure medium is returned from wheel brake cylinders or supplied from a main memory of the vehicle brake system, for example in vehicle brake systems with anti-lock braking system (ABS) and Electronic Stability Program (ESP). Valves in storage devices of hydraulic units, particularly vehicle brake systems, are used to control the amount of pressure fluid within the associated storage device.
Die Speichereinrichtungen umfassen einen Speicherzylinder und einen darin ge- führten Speicherkolben, mit dem ein Speichervolumen für das Druckmittel abgegrenzt wird. Aus dem Speichervolumen kann das Druckmittel bei Bedarf in einen Bremskreislauf gefördert werden. Verkleinert sich das Speichervolumen, so fährt der Speicherkolben derart tief in den Speicherzylinder hinein, dass er mit einem Öffnungsmittel ein federunterstützt geschlossenes Ventil öffnet. Durch das geöff- nete Ventil strömt dann wieder Druckmittel in den Speicherzylinder ein. Herkömmlich verwendete Öffnungsmittel sind als Stift gestaltet, der in den Speicherkolben passgenau ortsfest eingesetzt, insbesondere eingepresst ist. Die passgenaue Fertigung ist nötig, da das Öffnungsmittel zum Abheben des Ventildichtkörpers diesen richtig treffen muss. In der Regel wird das stiftförmige Öff- nungsmittel von der Kolbenseite durch die Ventilöffnung hindurch zum Ventildichtkörper geführt. Dazu ist insgesamt eine große Präzision bei der Teilegeometrie und bei der Hubbewegung des Speicherkolbens erforderlich. Eine präzise Teilegeometrie kann nur durch hochgenaue und damit kostenintensive Teile, Fertigung und Montage erreicht werden. Eine präzise Hubbewegung bedingt eine aufwändige Konstruktion mit beispielsweise zusätzlichen Führungsringen und großer Führlänge. The storage devices comprise a storage cylinder and a storage piston guided therein, with which a storage volume for the pressure medium is delimited. From the storage volume, the pressure medium can be promoted when needed in a brake circuit. If the storage volume decreases, the accumulator piston moves so deeply into the storage cylinder that it opens a spring-assisted closed valve with an opening means. Pressure fluid then flows into the cylinder again through the opened valve. Conventionally used opening means are designed as a pin, which fits accurately into the storage piston used, in particular pressed. Precisely fitting production is necessary because the opening means for lifting the valve sealing body has to hit it correctly. As a rule, the pin-shaped opening means is guided from the piston side through the valve opening to the valve sealing body. For this, a great deal of precision in the geometry of the parts and in the stroke movement of the accumulator piston is required. A precise part geometry can only be achieved by highly accurate and thus costly parts, manufacturing and assembly. A precise lifting movement requires a complex construction with, for example, additional guide rings and a large guide length.
Offenbarung der Erfindung Erfindungsgemäß ist ein Ventil einer Speichereinrichtung geschaffen, die mit einem Speicherzylinder und einem darin geführten Speicherkolben gebildet ist. Das Ventil ist mit einem Ventildichtkörper zum wahlweisen Öffnen und Verschließen einer Ventilöffnung an einem Ventilsitz versehen. Ferner weist das Ventil ein Öffnungsmittel zum wahlweisen Abheben des Ventildichtkörpers von dem Ventil- sitz auf. Das Öffnungsmittel ist dabei mit einem Federelement bzw. federnd gehalten. According to the invention, a valve of a storage device is provided which is formed with a storage cylinder and a storage piston guided therein. The valve is provided with a valve sealing body for selectively opening and closing a valve port on a valve seat. Furthermore, the valve has an opening means for selectively lifting the valve sealing body from the valve seat. The opening means is held with a spring element or resilient.
Mit den federnden Eigenschaften des Federelements verformt sich dieses beim Ausüben einer Kraft und nimmt bei Wegfall der angreifenden Kraft seine ur- sprüngliche Form wieder an. Dabei hält das Federelement zugleich das Öffnungsmittel an dem Ventildichtkörper in Position. Das Federelement ermöglicht damit eine ortsgenaue und zugleich robuste Positionierung des Öffnungsmittels. Zugleich gibt es dem Öffnungsmittel definierten Bewegungsspielraum, damit dieses bei Bedarf den Ventildichtkörper vom Ventilsitz abheben kann. With the resilient properties of the spring element, this deforms when a force is exerted and, when the attacking force ceases, returns to its original shape. The spring element at the same time holds the opening means on the valve sealing body in position. The spring element thus enables a location-accurate and at the same time robust positioning of the opening means. At the same time, there is defined freedom of movement for the opening means so that it can lift the valve sealing body from the valve seat if necessary.
Mit der erfindungsgemäßen Lösung ist das Öffnungsmittel besonders einfach und kostengünstig präzise positionierbar. Zugleich ist das Öffnungsmittel an dem Federelement ausreichend beweglich, um bei einer Bewegung des Kolbens von diesem mitbewegt und gegen den Ventildichtkörper geschoben zu werden. Zum Montieren wird das Öffnungsmittel mit dem zugehörigen Federelement bevorzugt einfach an der Speichereinrichtung eingeschoben und eingeclipst bzw. aufge- clipst. Zudem ist das Federelement zusammen mit dem Öffnungsmittel als vergleichsweise kleines Präzisionsteil kostengünstig herzustellen. Vorzugsweise ist daher das Öffnungsmittel mit dem Federelement ferner als Einzelteil gestaltet, das vorteilhaft vorgefertigt und mit geringem Aufwand mittels des Federelements kraftschlüssig und/oder formschlüssig an der Speichereinrichtung gehalten ist. With the solution according to the invention, the opening means is particularly simple and inexpensive precisely positioned. At the same time, the opening means on the spring element is sufficiently movable to be moved with a movement of the piston of this and pushed against the valve sealing body. For mounting, the opening means with the associated spring element is preferably simply inserted and clipped onto the storage device. Clipped-. In addition, the spring element is inexpensive to manufacture together with the opening means as a comparatively small precision part. Preferably, therefore, the opening means with the spring element is further designed as a single part, which is advantageously prefabricated and held with little effort by means of the spring element frictionally and / or positively on the storage device.
Insgesamt ergeben sich im Vergleich zu herkömmlichen Speichereinrichtungen geringere Genauigkeitsanforderungen an die Fertigung des Öffnungsmittels und dessen Montage an der Speichereinrichtung. Damit werden der Fertigungsauf- wand und die Fertigungskosten verringert. Overall, compared to conventional memory devices lower accuracy requirements for the production of the opening means and its mounting on the storage device. This reduces the production costs and the production costs.
Besonders bevorzugt ist das Öffnungsmittel mit dem Federelement am Speicherzylinder bzw. Zylinder gehalten. Mit der derartigen Halterung ist das Öffnungsmittel an jedem Bauteil gehalten, an dem zumindest indirekt auch der Ventilschließ- körper an seinem Ventilsitz anliegt. Daher ist die relative Position zwischen diesen Bauteilen dann besonders präzise. Ferner kann das Öffnungsmittel durch einfaches Einclipsen am Zylinder sehr leicht montiert werden. Particularly preferably, the opening means is held with the spring element on the storage cylinder or cylinder. With the support of this kind, the opening means is held on each component, against which the valve closing body at least indirectly abuts against its valve seat. Therefore, the relative position between these components is then particularly precise. Furthermore, the opening means can be easily mounted by simply clipping on the cylinder.
Alternativ ist das Öffnungsmittel vorteilhaft mit dem Federelement am Speicher- kolben bzw. Kolben gehalten. Auch dort ist eine einfache Clip-Montage möglich.Alternatively, the opening means is advantageously held with the spring element on the storage piston or piston. There, too, a simple clip assembly is possible.
Es kann ferner bei dieser Weiterbildung ein einfacher Standard-Speicherkolben verwendet werden, ohne dass an diesem eine besonders präzise Presspassung für ein Öffnungsmittel erforderlich wäre. Die Kolbengeometrie kann daher sehr einfach verbleiben. Ferner ist die Gefahr von Spanabrieb oder Verformung auf- grund von Presskräften nahezu vollständig vermieden. It can also be used in this development, a simple standard storage piston, without this would require a particularly precise press fit for an opening means. The piston geometry can therefore remain very simple. Furthermore, the risk of chip abrasion or deformation due to pressing forces is almost completely avoided.
Eine besonders präzise Positionierung des erfindungsgemäß gehaltenen Öffnungsmittels ist möglich, indem das zugehörige Federelement unmittelbar an dem den Ventilsitz bildenden Bauteil, insbesondere eines Ventilsitzkörpers, an- geordnet ist. Das derartige Federelement kann zusammen mit dem Öffnungsmittel dann auch besonders klein dimensioniert werden. Vorteilhaft ist auch eine einstückige Gestaltung des Federelements zusammen mit dem den Ventilsitz bildenden Bauteil. Ferner ist es auch von Vorteil, den Ventildichtkörper ebenso einteilig mit dem Öffnungsmittel und dem Federelement auszubilden. Dabei kann insbesondere die hohe Festigkeit von Federstahl auch für den Ventilsitz und/oder den Ventildichtkörper genutzt werden. Mit einem derartigen„Kombiteil" kann auch das umgebende Pumpengehäuse besonders klein gestaltet sein. A particularly precise positioning of the invention held opening means is possible by the associated spring element directly on the valve seat forming member, in particular a valve seat body, is arranged. The spring element of this type can then be dimensioned particularly small together with the opening means. Also advantageous is a one-piece design of the spring element together with the component forming the valve seat. Furthermore, it is also advantageous to also form the valve sealing body in one piece with the opening means and the spring element. In particular, the high strength of spring steel for the valve seat and / or be used the valve sealing body. With such a "combination part" and the surrounding pump housing can be designed to be particularly small.
Das Öffnungsmittel ist vorzugsweise mit einem Stiftelement zum Angreifen, insbesondere zum geringfügig exzentrischen Angreifen am Ventildichtkörper gestaltet. Ein derartiger Stift als Öffnungsmittel kann vorteilhaft durch die Ventilöffnung hindurchreichen, um dann einerseits am Ventildichtkörper anzugreifen und andererseits vom Speicherkolben betätigt zu werden. Das zum Ventildichtkörper gewandte Ende des Stiftes kann dazu besonders angepasst, insbesondere mit einer schräggestellten Kontaktfläche gestaltet sein, damit der Ventildichtkörper beim Anschlagen des Öffnungsmittels nicht an seiner Oberfläche verformt wird. Das Öffnungsmittel greift bevorzugt am Ventildichtkörper geringfügig exzentrisch an, wodurch das Ablösen und Abheben des Ventildichtkörpers von dem Ventilsitz erleichtert wird. Der Ventildichtkörper wird dann leicht asymmetrisch abgehoben, wodurch der Durchflussquerschnitt der Ventilöffnung schnell vergrößert wird und mehr Fluid pro Zeiteinheit hindurchfließen kann. The opening means is preferably designed with a pin element for engaging, in particular for slightly eccentric engagement on the valve sealing body. Such a pin as opening means can advantageously pass through the valve opening, in order then to attack on the one hand the valve sealing body and on the other hand to be actuated by the accumulator piston. The end of the pin facing the valve sealing body can be specially adapted for this purpose, in particular with an inclined contact surface, so that the valve sealing body is not deformed on its surface when the opening means are hit. The opening means preferably acts on the valve sealing body slightly eccentrically, whereby the detachment and lifting of the valve sealing body is facilitated by the valve seat. The valve sealing body is then slightly lifted asymmetrically, whereby the flow area of the valve opening is increased rapidly and more fluid per unit time can flow through.
Das erfindungsgemäße Federelement ist vorzugsweise mit einem im Wesentlichen radial gerichteten Stababschnitt gestaltet. Dieser Stababschnitt stellt eine federnde Verbindung von radial außen nach radial innen her und kann auf diese Weise sehr einfach ein stabförmiges Öffnungsmittel im Zentrum einer im Übrigen kreiszylindrischen Zylinder-Kolben-Anordnung halten. Dort im Zentrum kann vorteilhaft die Ventilöffnung angeordnet sein, wodurch ein symmetrischer und weitgehend laminarer Durchfluss durch das erfindungsgemäße Ventils erreicht werden kann. Dazu kann das Federelement sehr kostengünstig als ein einfacher Federdraht gestaltet sein. Mit dem Federdraht kann dann auch zugleich das stabförmige bzw. stiftförmige Öffnungsmittel hergestellt sein. The spring element according to the invention is preferably designed with a substantially radially directed rod portion. This rod portion provides a resilient connection from radially outward to radially inward, and in this way can very easily hold a rod-shaped opening means in the center of an otherwise circular-cylindrical cylinder-piston arrangement. There in the center can be advantageously arranged the valve opening, whereby a symmetrical and largely laminar flow through the valve according to the invention can be achieved. For this purpose, the spring element can be designed very inexpensively as a simple spring wire. The spring wire can then also be used to produce the rod-shaped or pin-shaped opening means.
Zum ortsfesten Anbringen des Federelements insbesondere am Speicherzylinder oder Speicherkolben ist das Federelement vorzugsweise mit einem ringförmigen Halteabschnitt gestaltet. Dieser Halteabschnitt kann mit einem Federdraht einen Federring bilden, der insbesondere an seinem Endabschnitt radial nach innen gewandt ist. Darüber hinaus ist es beim erfindungsgemäßen Ventil von Vorteil, wenn das Federelement mit einer zum Kolben gewandten, axialen Ausbuchtung gestaltet ist. Die derartige Ausbuchtung stellt einen Abstandshalter zwischen dem Speicherkolben und dem Öffnungsmittel dar. Es ermöglicht eine besonders einfache Anpassung der erfindungsgemäßen Anordnung an verschiedene Typen von Speicherzylindern und/oder Speicherkolben. For stationary attachment of the spring element, in particular on the storage cylinder or storage piston, the spring element is preferably designed with an annular holding portion. This holding section can form a spring ring with a spring wire, which is turned in particular at its end portion radially inwards. Moreover, it is advantageous in the valve according to the invention, when the spring element is designed with an axial bulge facing the piston. Such a bulge is a spacer between the accumulator piston and the opening means. It allows a particularly simple adaptation of the arrangement according to the invention to different types of storage cylinders and / or accumulator pistons.
Die Erfindung ist entsprechend ferner auf eine Verwendung eines derartigen erfindungsgemäßen Ventils in einer Speichereinrichtung gerichtet, insbesondere für ein Hydraulikaggregat einer Fahrzeugbremsanlage, bei der insbesondere der Speicherkolben mit einer zum Öffnungsmittel gewandten axialen Auswölbung gestaltet wird. Diese Gestaltung ist besonders vorteilhaft, wenn zugleich das Öffnungsmittel am Speicherzylinder oder am Ventilsitzkörper montiert wird. Bevorzugt ist die zum Öffnungsmittel gewandte Kolbenstirnfläche mit ihrer Auswölbung zumindest annähernd kugelabschnittsförmig gestaltet. Der Mittelpunkt des Kugelabschnitts ist vorteilhaft jener Punkt, um den sich der Speicherkolben innerhalb des Speicherzylinders geringfügig drehen bzw. schwenken kann, wenn er von seiner theoretisch linearen Bewegung abweicht. Der derartige Versatz des Speicherkolbens in dem Speicherzylinder hat dann weitgehend keine Auswirkung mehr auf die Betätigung des Öffnungsmittels. The invention is accordingly further directed to a use of such a valve according to the invention in a storage device, in particular for a hydraulic unit of a vehicle brake system, in which in particular the accumulator piston is designed with an axial bulge facing the opening means. This design is particularly advantageous if at the same time the opening means is mounted on the storage cylinder or on the valve seat body. Preferably, the piston end face facing the opening means is designed with its bulge at least approximately spherical segment-shaped. The center of the ball portion is advantageously that point about which the accumulator piston within the storage cylinder can slightly rotate or pivot when deviating from its theoretically linear motion. The such offset of the accumulator piston in the storage cylinder has then largely no effect on the operation of the opening means.
Nachfolgend werden Ausführungsbeispiele der erfindungsgemäßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. Es zeigt: Exemplary embodiments of the solution according to the invention will be explained in more detail below with reference to the attached schematic drawings. It shows:
Fig. 1 einen Teil eines hydraulischen Schaltplans einer Fahrzeugbremsanlage mit einer Speichereinrichtung gemäß dem Stand der Technik, 1 shows a part of a hydraulic circuit diagram of a vehicle brake system with a storage device according to the prior art,
Fig. 2 das Detail II in Fig. 1 , 2 shows the detail II in Fig. 1,
Fig. 3 einen Längsschnitt einer Speichereinrichtung gemäß Fig. 1 ,  3 shows a longitudinal section of a memory device according to FIG. 1, FIG.
Fig. 4 eine perspektivische Ansicht eines ersten Ausführungsbeispiels eines Federelements für eine Speichereinrichtung gemäß der Erfindung, 4 is a perspective view of a first embodiment of a spring element for a storage device according to the invention,
Fig. 5 eine perspektivische Ansicht eines zweiten Ausführungsbeispiels eines Federelements für eine Speichereinrichtung gemäß der Erfindung,5 is a perspective view of a second embodiment of a spring element for a storage device according to the invention,
Fig. 6 einen Längsschnitt eines ersten Ausführungsbeispiels einer Speichereinrichtung mit einem Federelement gemäß der Erfindung und Fig. 6 is a longitudinal section of a first embodiment of a memory device with a spring element according to the invention and
Fig. 7 einen Längsschnitt eines zweiten Ausführungsbeispiels einer Speichereinrichtung mit einem Federelement gemäß der Erfindung. In Fig. 1 ist eine Fahrzeugbremsanlage 10 veranschaulicht, die ein von einem Fahrer eines zugehörigen, vierrädrigen Fahrzeugs betätigbares Bremspedal 12 umfasst. Das Bremspedal 12 wirkt auf einen Bremskraftverstärker 14 ein, mittels dem an einem zugehörigen Hauptbremszylinder 16 Druck auf ein Fluid in Form von Bremsflüssigkeit erzeugt werden kann. Der Hauptbremszylinder 16 ist mit diversen Fluidleitungen 18 verbunden, mit denen insbesondere ein Umschaltventil 20, ein Pumpenelement 22 mit zugehörigem Antriebsmotor 24, ein Einlassventil 26 für links hinten, ein Einlassventil 28 für rechts vorne, ein Auslassventil 30 für links hinten, ein Auslassventil 32 für rechts vorne sowie ein Bremszylinder 34 für links hinten und ein Bremszylinder 36 für rechts vorne wahlweise fluidleitend miteinander verbunden sind. Ferner ist in die Fluidleitungen 18 eine Speichereinrichtung 38 zum Zwischenspeichern von Bremsfluid geschaltet. Fig. 7 is a longitudinal section of a second embodiment of a storage device with a spring element according to the invention. In Fig. 1, a vehicle brake system 10 is illustrated, which comprises an actuatable by a driver of an associated four-wheeled vehicle brake pedal 12. The brake pedal 12 acts on a brake booster 14, by means of which pressure on a fluid in the form of brake fluid can be generated at an associated master cylinder 16. The master cylinder 16 is connected to various fluid lines 18, with which in particular a switching valve 20, a pump element 22 with associated drive motor 24, an inlet valve 26 for the left rear, an inlet valve 28 for the right front, a left outlet valve 30, an outlet valve 32 for right front and a brake cylinder 34 for the left rear and a brake cylinder 36 for right front are optionally fluid-conductively connected together. Furthermore, a storage device 38 for temporarily storing brake fluid is connected in the fluid lines 18.
Die Speichereinrichtung 38 ist in Fig. 2 mit einer gröberen und in Fig. 3 mit einer feineren Prinzipskizze veranschaulicht. Die Speichereinrichtung 38 umfasst einen becherförmigen, kreiszylindrischen Speicherzylinder 40, in dem ein Speicherkolben 42 verschiebbar gelagert ist. Der Speicherkolben 42 ist dabei innenseitig am Speicherzylinder 40 mittels einer am Speicherkolben 42 ortsfest angeordneten Kolbendichtung 44 fluiddicht, aber zugleich verschiebbar abgedichtet. Eine Kolbenfeder 46 drängt den derart verschiebbar gelagerten Speicherkolben 42 in die Becherform des Speicherzylinders 40 hinein, wodurch in dessen Inneren ein Druckraum zum Zwischenspeichern von Bremsfluid unter Druck gebildet ist. The memory device 38 is illustrated in FIG. 2 with a coarser and in FIG. 3 with a finer schematic diagram. The storage device 38 comprises a cup-shaped, circular cylindrical storage cylinder 40, in which a storage piston 42 is slidably mounted. The storage piston 42 is internally sealed to the storage cylinder 40 by means of a piston piston 42 fixedly arranged piston seal 44 fluid-tight, but at the same time displaceably sealed. A piston spring 46 urges the storage piston 42, which is displaceably mounted in this way, into the cup shape of the storage cylinder 40, as a result of which a pressure space for temporarily storing brake fluid under pressure is formed in its interior.
An der dem Speicherkolben 42 gegenüberliegenden Bodenfläche der Becherform des Speicherzylinders 40 ist an diesem ein Ventil 48 ausgebildet, mittels dem wahlweise Bremsfluid in das Innere des Speicherzylinders 40 eingelassen werden kann. Das Ventil 48 wird mittels des Speicherkolbens 42 betätigt, wenn sich dieser weit in den Speicherzylinder 40 hineinbewegt und sich damit dem Ventil 48 nähert. Dazu ist das Ventil 48 mit einem Ventildichtkörper 50 gestaltet, der mittels einer Ventilfeder 52 in Richtung auf den Speicherkolben 42 gegen einen Ventilsitz 54 gedrängt wird. Der Ventilsitz 54 ist an einem Ventilsitzkörper 56 ausgeformt und umgibt dort eine Ventilöffnung 58. Der Ventilsitzkörper 56 kann einteilig ausgebildet sein, mehrteilig mit einem Ventilsitz sowie einem Ventilsitzträger oder integriert als eine Befestigung im Speicherzylinder 40. An dem Speicherkolben 42 ist ein Öffnungsmittel 60 in Form eines Stiftes ausgebildet, der in einer Presspassung 62 am Speicherkolben 42 gegenüberliegend von der Ventilöffnung 58 eingepresst und dort ortsfest gehalten ist. Die Presspassung 62 dient dazu, das stiftförmige Öffnungsmittel 60 insbesondere in axialer Richtung des Speicherkolbens 42 sehr präzise relativ zu dem am Ventilsitz 54 anliegenden Ventildichtkörper 50 zu positionieren. Eine präzise Positionierung ist erforderlich, damit der Speicherkolben 42 den Ventildichtkörper 50 bei seiner Bewegung in den Speicherkolben 42 hinein an einer genau definierten Stelle vom Ventilsitz 54 abhebt und auf diese Weise das Ventil 48 öffnet. At the bottom surface opposite the accumulator piston 42 of the cup shape of the accumulator cylinder 40, a valve 48 is formed thereon, by means of which brake fluid can optionally be introduced into the interior of the accumulator cylinder 40. The valve 48 is actuated by means of the accumulator piston 42 when it moves far into the storage cylinder 40 and thus approaches the valve 48. For this purpose, the valve 48 is designed with a valve sealing body 50, which is urged by means of a valve spring 52 in the direction of the accumulator piston 42 against a valve seat 54. The valve seat 54 is formed on a valve seat body 56 and surrounds there a valve opening 58. The valve seat body 56 may be integrally formed, in several parts with a valve seat and a valve seat carrier or integrated as an attachment in the storage cylinder 40th On the accumulator piston 42, an opening means 60 in the form of a pin is formed, which is pressed in a press fit 62 on the accumulator piston 42 opposite of the valve opening 58 and held stationary there. The press fit 62 serves to position the pin-shaped opening means 60 very precisely relative to the valve sealing body 50 resting against the valve seat 54, in particular in the axial direction of the accumulator piston 42. A precise positioning is required so that the accumulator piston 42 lifts the valve sealing body 50 in its movement into the accumulator piston 42 at a well-defined location of the valve seat 54 and in this way the valve 48 opens.
In Fig. 4 ist ein Federelement 64 gemäß der Erfindung veranschaulicht. Das Federelement 64 ist aus Federdraht gebildet und umfasst einen ringförmigen, an einer Stelle offenen Halteabschnitt 66 sowie einen davon radial nach innen abstehenden Stababschnitt 68. Diese beiden Abschnitte 66 und 68 dienen dazu, ein Öffnungsmittel 70 federnd zu halten, welches an den Stababschnitt 68 in Form eines axial gerichteten Stiftabschnitts anschließt. 4, a spring element 64 is illustrated according to the invention. The spring element 64 is formed of spring wire and comprises an annular, in one place open holding portion 66 and a radially inwardly projecting rod portion 68. These two portions 66 and 68 serve to hold an opening means 70 resiliently, which on the rod portion 68 in Form of an axially directed pin portion connects.
Bei dem Ausführungsbeispiels eines Federelements 64 gemäß Fig. 5 ist am Übergang vom Stababschnitt 68 in das stiftförmige Öffnungsmittel 70 eine vom Öffnungsmittel 70 abgewandte Ausbuchtung 71 des Federdrahtes ausgeformt. In the exemplary embodiment of a spring element 64 according to FIG. 5, a bulge 71 of the spring wire facing away from the opening means 70 is formed at the transition from the rod section 68 into the pin-shaped opening means 70.
Der Stiftabschnitt ragt, wie in den Fig. 6 und 7 veranschaulicht ist, durch die zugehörige Ventilöffnung 58 und endet mit einer schräg ausgerichteten Kontaktfläche 72, die dazu vorgesehen ist, gegen den zugehörigen Ventildichtkörper 50 anzuschlagen. Die Positionierung des Öffnungsmittels 70 entspricht damit jenem des Öffnungsmittels 60 gemäß dem Stand der Technik. Zugleich ist das Öffnungsmittel 70 aber nicht starr an einem anderen Körper der Speichereinrichtung 38 angeordnet, sondern federnd. Sie kann derart insbesondere federnd direkt oder indirekt an dem Speicherzylinder angeordnet sein, wodurch eine einfache und zugleich präzise Positionierung relativ zum Ventildichtkörper möglich ist. The pin portion protrudes, as illustrated in FIGS. 6 and 7, through the associated valve opening 58 and terminates in an obliquely oriented contact surface 72 which is intended to abut against the associated valve sealing body 50. The positioning of the opening means 70 thus corresponds to that of the opening means 60 according to the prior art. At the same time, the opening means 70 is not rigidly arranged on another body of the storage device 38, but resilient. It can be arranged in such a way, in particular resiliently, directly or indirectly on the storage cylinder, whereby a simple and at the same time precise positioning relative to the valve sealing body is possible.
Die Fig. 6 veranschaulicht ein Ausführungsbeispiel, bei dem das Federelement 64 mit seinem Halteabschnitt 66 innenseitig an dem Speicherzylinder 40 einge- clipst und auf diese Weise dort ortsfest angebracht ist. Die Fig. 7 zeigt ein Ausführungsbeispiel, bei dem das Federelement 64 mit seinem ringförmigen Halte- abschnitt 66 an einem entsprechend ausgeformten Ventilsitzkörper 56 und damit in unmittelbarer Nähe zum Ventilsitz 54 gehaltert ist. FIG. 6 illustrates an exemplary embodiment in which the spring element 64 with its holding section 66 is clip-in on the inside of the storage cylinder 40 and in this way is mounted there in a stationary manner. 7 shows an embodiment in which the spring element 64 with its annular retaining Section 66 is supported on a correspondingly shaped valve seat body 56 and thus in the immediate vicinity of the valve seat 54.
Das derart am Speicherzylinder 40 bzw. am Ventilsitzkörper 56 federnd gehalte- ne Öffnungsmittel 70 wird mittels des Speicherkolbens 42 gegen den Ventildichtkörper 50 bewegt, um diesen wie oben bereits erläutert vom Ventilsitz 54 abheben zu können. Dazu ist an einer dem Federelement 64 zugewandten Kolbenstirnfläche 74 mittig eine Auswölbung 76 ausgebildet, mit der der Speicherkolben 42 bei seiner Bewegung in den Speicherzylinder 40 hinein anstößt. Die Auswöl- bung 76 ist in der Form eines Kugelabschnitts gestaltet und weist dabei einenThe opening means 70 resiliently held on the storage cylinder 40 or on the valve seat body 56 is moved by means of the accumulator piston 42 against the valve sealing body 50 in order to be able to lift it off the valve seat 54 as already explained above. For this purpose, a bulge 76 is formed centrally on a piston end face 74 facing the spring element 64, with which the storage piston 42 abuts during its movement into the storage cylinder 40. The bulge 76 is designed in the form of a spherical section and has a
Radius 78 auf, der derart gewählt ist, dass der Speicherkolben 42 bei einem geringfügigen Schwenken innerhalb des Speicherzylinders 40 sich um jenen Mittelpunkt 80 schwenkt, von dem der Radius 78 ausgeht. Radius 78, which is selected such that the storage piston 42 pivots at a slight pivoting within the storage cylinder 40 to the center 80 from which the radius 78 starts.

Claims

Ansprüche claims
1 . Ventil (48) einer Speichereinrichtung (38), die mit einem Speicherzylinder (40) und einem darin geführten Speicherkolben (42) gebildet ist, mit einem Ventildichtkörper (50) zum wahlweisen Öffnen und Verschließen einer Ventilöffnung (58) an einem Ventilsitz (54) und einem Öffnungsmittel (70) zum wahlweisen Abheben des Ventildichtkörpers (50) von dem Ventilsitz (54), bei dem das Öffnungsmittel (70) mit einem Federelement (64) gehalten ist. 1 . Valve (48) of a storage device (38), which is formed with a storage cylinder (40) and a storage piston (42) guided therein, with a valve sealing body (50) for selectively opening and closing a valve opening (58) on a valve seat (54) and an opening means (70) for selectively lifting the valve sealing body (50) from the valve seat (54), wherein the opening means (70) is held with a spring member (64).
2. Ventil nach Anspruch 1 , 2. Valve according to claim 1,
bei dem das Öffnungsmittel (70) mit dem Federelement (64) am Speicherzylinder (40) gehalten ist.  in which the opening means (70) with the spring element (64) is held on the storage cylinder (40).
3. Ventil nach Anspruch 1 , 3. Valve according to claim 1,
bei dem das Öffnungsmittel (70) mit dem Federelement (64) am Speicherkolben (42) gehalten ist.  in which the opening means (70) with the spring element (64) is held on the accumulator piston (42).
4. Ventil nach Anspruch 1 , 4. Valve according to claim 1,
bei dem das Öffnungsmittel (70) mit dem Federelement (64) an einem den Ventilsitz (54) bildenden Ventilsitzkörper (56) gehalten ist.  in which the opening means (70) with the spring element (64) is held on a valve seat body (56) forming the valve seat (54).
5. Ventil nach einem der Ansprüche 1 bis 4, 5. Valve according to one of claims 1 to 4,
bei dem das Öffnungsmittel (70) mit einem Stiftelement zum Angreifen, insbesondere zum geringfügig exzentrischen Angreifen am Ventildichtkörper (50) gestaltet ist.  in which the opening means (70) is designed with a pin element for engagement, in particular for slightly eccentric engagement with the valve sealing body (50).
6. Ventil nach einem der Ansprüche 1 bis 5, 6. Valve according to one of claims 1 to 5,
bei dem das Federelement (64) mit einem im Wesentlichen radial gerichteten Stababschnitt (68) gestaltet ist. in which the spring element (64) is designed with a substantially radially directed rod section (68).
7. Ventil nach einem der Ansprüche 1 bis 6, 7. Valve according to one of claims 1 to 6,
bei dem das Federelement (64) als Federdraht gestaltet ist. in which the spring element (64) is designed as a spring wire.
8. Ventil nach einem der Ansprüche 1 bis 7, 8. Valve according to one of claims 1 to 7,
bei dem das Federelement (64) mit einem ringförmigen Halteabschnitt (66) gestaltet ist in which the spring element (64) is designed with an annular holding portion (66)
9. Ventil nach einem der Ansprüche 1 bis 8, 9. Valve according to one of claims 1 to 8,
bei dem das Federelement (64) mit einer zum Speicherkolben (42) gewandten, axialen Ausbuchtung (71 ) gestaltet ist. in which the spring element (64) is designed with an axial bulge (71) facing the accumulator piston (42).
10. Verwendung eines Ventils (48) nach einem der Ansprüche 1 bis 9 in einer Speichereinrichtung (38), insbesondere für ein Hydraulikaggregat einer Fahrzeugbremsanlage (10), bei der insbesondere der Speicherkolben (42) mit einer zum Öffnungsmittel (70) gewandten axialen Auswölbung (76) gestaltet wird. 10. Use of a valve (48) according to one of claims 1 to 9 in a memory device (38), in particular for a hydraulic unit of a vehicle brake system (10), in which in particular the accumulator piston (42) with an opening means (70) facing axial bulge (76) is designed.
PCT/EP2013/065197 2012-08-03 2013-07-18 Valve of a storage device having an opening means WO2014019868A1 (en)

Priority Applications (1)

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CN201380040980.1A CN104507769B (en) 2012-08-03 2013-07-18 Valve with the energy storage device for opening part

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DE102012213764.5 2012-08-03

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DE102016221152A1 (en) * 2016-10-27 2018-05-03 Robert Bosch Gmbh Piston and method of making a piston
TWI735339B (en) * 2020-09-18 2021-08-01 彥豪金屬工業股份有限公司 Hydraulic pressure sensing device and anti-lock braking assembly

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DE102011007178A1 (en) * 2011-04-12 2012-10-18 Continental Teves Ag & Co. Ohg Valve assembly, particularly for damping of pressure vibrations in hydraulic system, has friction- or stop unit that is provided within a closing spring and provided as homogeneous component of closing spring
DE102011089956A1 (en) * 2011-12-27 2013-06-27 Robert Bosch Gmbh Hydraulically controlled storage chamber valve

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DE3233268A1 (en) * 1982-09-08 1984-03-08 Robert Bosch Gmbh, 7000 Stuttgart Hydraulic valve
DE4236045A1 (en) * 1992-04-03 1993-11-04 Teves Gmbh Alfred HYDRAULIC CHANGEOVER VALVE FOR A VEHICLE BRAKE SYSTEM
CN101057085A (en) * 2004-09-10 2007-10-17 丹福斯有限公司 A spring and a valve incorporating such a spring
JP2006151362A (en) * 2004-11-04 2006-06-15 Advics:Kk Pressure adjustment reservoir and vehicle brake device using it
DE102006036691B4 (en) * 2006-08-05 2014-07-03 Zf Friedrichshafen Ag check valve
JP5187283B2 (en) * 2009-06-25 2013-04-24 株式会社アドヴィックス Check valve and brake fluid pressure control device
DE102010038338A1 (en) * 2010-03-23 2011-09-29 Robert Bosch Gmbh Filter installation for filtering petrol in internal combustion engine of e.g. passenger vehicle, has filter case whose interior region comprises sealing element by which nozzles are sealed together with respect to filter element

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
DE102011007178A1 (en) * 2011-04-12 2012-10-18 Continental Teves Ag & Co. Ohg Valve assembly, particularly for damping of pressure vibrations in hydraulic system, has friction- or stop unit that is provided within a closing spring and provided as homogeneous component of closing spring
DE102011089956A1 (en) * 2011-12-27 2013-06-27 Robert Bosch Gmbh Hydraulically controlled storage chamber valve

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CN104507769A (en) 2015-04-08
CN104507769B (en) 2018-03-23
DE102012213764A1 (en) 2014-02-06

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