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DE10131658A1 - Brake fluid store for use in motor vehicle brake system has closing off valve with double sealing points to reduce chance of leakage causing harm to chamber separating metallic bellows arrangement - Google Patents

Brake fluid store for use in motor vehicle brake system has closing off valve with double sealing points to reduce chance of leakage causing harm to chamber separating metallic bellows arrangement

Info

Publication number
DE10131658A1
DE10131658A1 DE2001131658 DE10131658A DE10131658A1 DE 10131658 A1 DE10131658 A1 DE 10131658A1 DE 2001131658 DE2001131658 DE 2001131658 DE 10131658 A DE10131658 A DE 10131658A DE 10131658 A1 DE10131658 A1 DE 10131658A1
Authority
DE
Germany
Prior art keywords
valve
closing
sealing point
sealing
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.)
Withdrawn
Application number
DE2001131658
Other languages
German (de)
Inventor
Ronald Bayer
Peter E Rieth
Manfred Rueffer
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.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
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 Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Priority to DE2001131658 priority Critical patent/DE10131658A1/en
Publication of DE10131658A1 publication Critical patent/DE10131658A1/en
Withdrawn legal-status Critical Current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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port constructions
    • 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
    • B60T13/14—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 accumulators or reservoirs fed by pumps
    • B60T13/148—Arrangements for pressure supply
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements 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
    • B60T8/34—Arrangements 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
    • B60T8/40—Arrangements 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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4068—Arrangements 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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system the additional fluid circuit comprising means for attenuating pressure pulsations
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve 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
    • F15B2201/00—Accumulators
    • F15B2201/50—Monitoring, detection and testing means for accumulators
    • F15B2201/515—Position detection for separating means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

The brake fluid store for a motor vehicle braking system has a housing (1) with a connection (2) for the brake fluid. A body (3) within the housing separates two chambers (12,14). A closing valve (4) blocks off the fluid connection when the maximum lift of the separating body is reached. The closing valve has first and second sealing points (5,6) that are closed sequentially if a leak occurs.

Description

Die Erfindung betrifft einen Druckmittelspeicher für Kraftfahrzeug-Bremsanlagen nach dem Oberbegriff des Patentanspruchs 1. The invention relates to a pressure medium storage for Motor vehicle braking systems according to the preamble of Claim 1.

In der DE 197 06 427 A1 ist bereits ein Druckmittelspeicher beschrieben, bei dem ein Metallfaltenbalg zum Einsatz kommt, der auch im entleerten Zustand weitestgehend differenzdruckfrei ist und deshalb entsprechend dünnwandig ausgeführt werden kann. Voraussetzung hierfür ist ein Speicherschließventil, das bei Erreichen des konstruktiv festgelegten Maximalhubes des Metallfaltenbalgs geschlossen wird, so dass kein weiteres Flüssigkeitsvolumen entnommen werden kann. Sollte dieses Speicherschließventil durch einen Fehler nicht absolut dicht schließen und dadurch Druckmittelvolumen über das zulässige Maß aus dem Druckmittelspeicher gelangen, kann dies zur Beschädigung oder zur Zerstörung des Metallfaltenbalgs führen. DE 197 06 427 A1 already contains a pressure medium reservoir described in which a metal bellows is used, which largely in the emptied state is free of differential pressure and is therefore designed with thin walls can be. The prerequisite for this is a Accumulator closing valve, which is reached when the constructively determined Maximum stroke of the metal bellows is closed, so that no further volume of liquid can be removed. Should this accumulator closing valve is not due to an error close absolutely tight and thereby pressure medium volume over the permissible dimension can get out of the pressure fluid reservoir this will damage or destroy the Guide metal bellows.

Daher ist es die Aufgabe der vorliegenden Erfindung, einen Druckmittelspeicher zu schaffen, der vorgenannte Nachteile nicht aufweist. It is therefore the object of the present invention to provide a To create pressure medium storage, the aforementioned disadvantages does not have.

Diese Aufgabe wird erfindungsgemäß für einen Druckmittelspeicher der angegebenen Art durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. This task is inventively for one Pressure fluid storage of the specified type by the characteristic Features of claim 1 solved.

Bei der vorliegenden Erfindung handelt es sich um ein neuartiges Speicherschließventil, das zwei Dichtstellen besitzt. Die besondere Idee ist dabei, dass die zwei Dichtstellen nicht gleichzeitig schließen, sondern die zweite Dichtstelle erst dann zum Einsatz kommt, wenn die erste Dichtstelle undicht ist. The present invention is a novel storage closing valve that has two sealing points. The special idea here is that the two sealing points do not close at the same time, but the second sealing point is only used when the first sealing point is leaking.

Weitere Merkmale, Vorteile und Anwendungsmöglichkeiten der Erfindung werden im nachfolgenden anhand der Beschreibung eines Ausführungsbeispieles anhand mehrerer Zeichnungen erläutert. Other features, advantages and possible uses of the Invention are described below with reference to the description an embodiment with reference to several drawings explained.

Es zeigen: Show it:

Fig. 1 einen Längsschnitt durch einen mit den erfindungswesentlichen Merkmalen versehenen Druckmittelspeicher mit einem in Offenstellung befindlichen Speicherschließventil, Fig. 1 shows a longitudinal section through a provided with the features essential to the invention with a pressure fluid accumulator located in the open position memory closing valve,

Fig. 2 den Druckmittelspeicher nach Fig. 1 im technisch einwandfreiem Schließzustand des Speicherschließventils, Fig. 2 shows the accumulator of Fig. 1 in a technically perfect closing state of the memory closing valve,

Fig. 3 den Druckmittelspeicher nach Fig. 1 in einer Notfunktion des Speicherschließventils. Fig. 3 shows the accumulator 1 according to Fig. In an emergency function of the memory closing valve.

Die Fig. 1 zeigt einen Druckmittelspeicher für Kraftfahrzeug-Bremsanlagen, mit einem einen Druckmittelanschluss 2 aufweisenden Gehäuse 1, einem im Gehäuse 1 beweglich angeordneten, zwei Kammern 12, 14 voneinander trennenden Körper 3 sowie mit einem Speicherschließventil 4, das bei Erreichen eines Maximaldruckes des Körpers 3 den Druckmittelanschluss 2 absperrt. Erfindungsgemäß weist das Speicherschließventil 4 eine erste Dichtstelle 5 sowie eine zweite Dichtstelle 6 auf, die nacheinander geschlossen werden können. Die erste Dichtstelle 5 wirkt mit einer den Körper 3 verschließenden Führungsplatte 7 zusammen. Die erste Dichtstelle 5 ist biegeweich in der Führungsplatte 7 eingespannt, um Parallelitätsfehler zwischen der an einer Ventilplatte 11 angebrachten ersten Dichtstelle 5 und einem Dichtsitz am Speicherboden 10 auszugleichen. Durch die Gestaltung der aus einer Dichtung und einer Dichtfuge gebildeten ersten Dichtstelle 5 kann das Speicherschließventil weitestgehend schmutzunempfindlich arbeiten. Die am Körper 3 angebrachte Führungsplatte 7 dient zur Zentrierung des Speicherschließventils 4, die auch gleichzeitig den als Metallfaltenbalg ausgeführten Körper 3 zentriert und führt. Die zweite Dichtstelle 6 im Gehäuse 1 wirkt mit einem Ventilschließkörper 8 zusammen, der durch ein mit der ersten Dichtstelle 5 in kraftübertragender Verbindung stehendes Betätigungsteil 9 betätigbar ist. Zur Druckmittellade- und -verbrauchsüberwachung kann vorzugsweise ein Wegsensor dienen, der ggf. auch die Funktion des Speicherschließventils 4 überwacht. Fig. 1 shows an accumulator for motor vehicle brake systems, with a pressure medium connection 2 comprising a housing 1, arranged movably in the housing 1, two chambers 12, 14 from each other, separating body 3 and with a memory closing valve 4, which on reaching a maximum pressure of the body 3 shuts off the pressure medium connection 2 . According to the invention, the storage closing valve 4 has a first sealing point 5 and a second sealing point 6 , which can be closed one after the other. The first sealing point 5 interacts with a guide plate 7 closing the body 3 . The first sealing point 5 is clamped flexibly in the guide plate 7 in order to compensate for parallelism errors between the first sealing point 5 attached to a valve plate 11 and a sealing seat on the storage base 10 . Due to the design of the first sealing point 5 formed from a seal and a sealing joint, the storage closing valve can operate largely insensitive to dirt. The guide plate 7 attached to the body 3 serves to center the accumulator closing valve 4 , which at the same time also centers and guides the body 3 designed as a metal bellows. The second sealing point 6 in the housing 1 interacts with a valve closing body 8 which can be actuated by an actuating part 9 which is in force-transmitting connection with the first sealing point 5 . A displacement sensor, which may also monitor the function of the accumulator closing valve 4 , can preferably be used to monitor and charge the pressure medium.

In vorliegender Abbildung nach Fig. 1 befindet sich das Speicherschließventil in der offenen Schaltposition, in der Druckmittel durch den Druckmittelanschluss 2 in die druckmittelspeichernde Kammer 12 gelangt. Hierzu befindet sich der in das Gehäuse 1 eingesetzte Ventilschließkörper 8 in einer von einem Dichtring abgehobenen Position, welcher im Bereich der zweiten Dichtstelle 6 angeordnet ist, so dass in den Druckmittelspeicher eintretendes Druckmittel ungehindert entlang der im wesentlichen stößelförmigen Kontur des Ventilschließkörpers 8 in die flüssigkeitsaufnehmende Kammer 12 gelangt, die durch den Körper 3 von der gasaufnehmenden Kammer 14 getrennt ist. Auch die an der Ventilplatte 11 mit einem O-Ring versehene erste Dichtstelle 5 befindet sich infolge ihrer Befestigung an der Führungsplatte 7 zur Befüllung der Kammer 12 vom Speicherboden 10 entfernt. In the present illustration according to FIG. 1, the accumulator closing valve is in the open switching position in which pressure medium reaches the pressure medium storage chamber 12 through the pressure medium connection 2 . For this purpose, the valve closing body 8 inserted into the housing 1 is in a position lifted from a sealing ring, which is arranged in the region of the second sealing point 6 , so that pressure medium entering the pressure medium accumulator unimpeded along the essentially tappet-shaped contour of the valve closing body 8 into the liquid-absorbing chamber 12 arrives, which is separated from the gas-receiving chamber 14 by the body 3 . The first sealing point 5 provided with an O-ring on the valve plate 11 is also located away from the storage base 10 due to its attachment to the guide plate 7 for filling the chamber 12 .

Die Fig. 2 zeigt den entleerten Zustand der Kammer 12, in dem sich die Ventilplatte 11 mit der Dichtstelle 5 auf dem Speicherboden 10 aufsetzt und damit in einer fehlerfreien Normalfunktion den Speicherausgang (Druckmittelanschluß 2) verschließt. Die aus dem O-Ring gebildete erste Dichtstelle 5 liegt somit flächig am Speicherboden 10 an, während der im wesentlichen stößelförmige Ventilschließkörper 8 infolge der Wirkung einer Druckfeder 13 in einer Stellung verharrt, in welcher die Kopfplatte des Ventilschließkörpers 8 von der im Gehäuseboden 10 als O-Ring eingefassten zweiten Dichtstelle 6 abgehoben ist. Über die geöffnete zweite Dichtstelle 6 kann demnach Druckmittel bis zur ersten Dichtstelle 5 gelangen. Fig. 2 shows the deflated state of the chamber 12, the valve plate 11 touches down in the with the sealing point 5 on the cylinder floor 10 and thus closes the memory output (pressure medium connection 2) in a fault-free normal function. The first sealing point 5 formed from the O-ring is thus flat on the storage base 10, while the substantially plunger-shaped valve closing body 8 remains due to the action of a compression spring 13 in a position in which the top plate of the valve closing body 8 from the bottom of the housing 10 as the O -Ring edged second sealing point 6 is lifted. Accordingly, pressure medium can reach the first sealing point 5 via the opened second sealing point 6 .

Die Fig. 3 zeigt den durch einen technischen Defekt bestimmten Speicherzustand, in dem beispielsweise durch Beschädigung oder Verschmutzung am Dichtsitz der Ventilplatte 11 eine Undichtigkeit eintritt. Hierdurch verliert die erste Kammer 12 in Richtung des Druckmittelanschlusses 2 zunehmend an Flüssigkeit, wodurch sich der Faltenbalg (Körper 3) weiter als normalerweise üblich, in Richtung des Speicherbodens 11 bewegt und dabei das stößelförmige Betätigungsglied 9 auf die Kopfplatte des Ventilschließkörpers 8 drückt, so dass entgegen der Wirkung der Druckfeder 13 die erste Dichtstelle 5 verschlossen wird. Damit ist gewährleistet, dass in einem Fehlerfall der Speicherausgang sicher verschlossen bleibt und keine weitere Druckflüssigkeit entweicht. Da der Ventilschließkörper 8 nur im Notfall, d. h. beim Versagen der ersten Dichtstelle 5, in Funktion tritt, bleibt die Dichtstelle 6 am Ventilschließkörper 8 bis zu diesem Zeitpunkt zunächst wirkungslos. Bei Bedarf kann mittels eines Sensors der Weg des Ventilschließkörpers 8 überwacht werden, um ggf. die Notfunktion des Druckmittelspeichers sensieren zu können. Fig. 3 shows the determined by a technical defect memory state in which, for example, by damage or dirt on the sealing seat of the valve plate 11 enters a leak. As a result, the first chamber 12 increasingly loses liquid in the direction of the pressure medium connection 2 , as a result of which the bellows (body 3 ) moves further than usual in the direction of the storage base 11 and thereby presses the plunger-shaped actuating member 9 onto the head plate of the valve closing body 8 , so that against the action of the compression spring 13, the first sealing point 5 is closed. This ensures that, in the event of an error, the accumulator outlet remains securely closed and no further hydraulic fluid escapes. Since the valve closing body 8 only functions in an emergency, ie when the first sealing point 5 fails, the sealing point 6 on the valve closing body 8 initially has no effect until this point in time. If necessary, the path of the valve closing body 8 can be monitored by means of a sensor in order to be able to sense the emergency function of the pressure medium accumulator if necessary.

Durch die vorbeschriebene Ausgestaltung des Speicherschließventils 4 ist die erforderliche Betriebssicherheit des Druckmittelspeichers jederzeit gewährleistet. Bezugszeichenliste 1 Gehäuse
2 Druckmittelanschluss
3 Körper
4 Speicherschließventil
5 Erste Dichtstelle
6 Zweite Dichtstelle
7 Führungsplatte
8 Ventilschließkörper
9 Betätigungsteil
10 Speicherboden
11 Ventilplatte
12 Kammer
13 Druckfeder
14 Kammer
The above-described design of the accumulator closing valve 4 ensures the required operational safety of the pressure medium accumulator at all times. LIST OF REFERENCE NUMERALS 1 Housing
2 pressure medium connection
3 bodies
4 storage closing valve
5 First sealing point
6 Second sealing point
7 guide plate
8 valve closing body
9 operating part
10 storage floors
11 valve plate
12 chamber
13 compression spring
14 chamber

Claims (6)

1. Druckmittelspeicher für Kraftfahrzeug-Bremsanlagen, mit einem einen Druckmittelanschluss (2) aufweisenden Gehäuse (1), einem im Gehäuse (1) beweglich angeordneten, eine erste und zweite Kammer (12, 14) voneinander trennenden Körper (3), sowie mit einem Speicherschließventil (4), das bei Erreichen eines Maximaldruckes des Körpers (3) den Druckmittelanschluss (2) absperrt, dadurch gekennzeichnet, dass das Speicherschließventil (4) eine erste sowie eine zweite Dichtstelle (5, 6) aufweist, wobei die zweite Dichtstelle (6) nur dann druckmitteldicht verschlossen ist, wenn an der ersten Dichtstelle (5) eine Undichtigkeit eintritt. 1. Pressure fluid accumulator for motor vehicle brake systems, with a pressure medium connection ( 2 ) housing ( 1 ), a movable in the housing ( 1 ) arranged, a first and second chamber ( 12 , 14 ) separating body ( 3 ), and with a memory closing valve (4), which on reaching a maximum pressure of the body (3) shuts off the pressure medium connection (2), characterized in that the storage closing valve (4) comprises a first and a second sealing location (5, 6), wherein the second sealing point (6 ) is only sealed pressure-tight if a leak occurs at the first sealing point ( 5 ). 2. Druckmittelspeicher nach Anspruch 1, dadurch gekennzeichnet, dass die erste und zweite Dichtstelle (5, 6) bei Ausfall der ersten Dichtstelle (5) nacheinander geschlossen werden. 2. Pressure fluid accumulator according to claim 1, characterized in that the first and second sealing points ( 5 , 6 ) are closed in succession if the first sealing point ( 5 ) fails. 3. Druckmittelspeicher nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die erste Dichtstelle (5) mit einer den Körper (3) verschließenden Führungsplatte (7) zusammenwirkt. 3. Pressure medium accumulator according to claim 1 or 2, characterized in that the first sealing point ( 5 ) cooperates with a body ( 3 ) closing guide plate ( 7 ). 4. Druckmittelspeicher nach Anspruch 3, dadurch gekennzeichnet, dass die erste Dichtstelle (5) biegeweich in der Führungsplatte (7) eingespannt ist. 4. Pressure fluid accumulator according to claim 3, characterized in that the first sealing point ( 5 ) is clamped in the guide plate ( 7 ) in a flexible manner. 5. Druckmittelspeicher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zweite Dichtstelle (6) im Gehäuse (1) angeordnet ist und mit einem Ventilschließkörper (8) zusammenwirkt, der durch ein mit der ersten Dichtstelle (5) in kraftübertragender Verbindung stehendes Betätigungsteil (9) betätigbar ist. 5. Pressure fluid accumulator according to one of the preceding claims, characterized in that the second sealing point ( 6 ) is arranged in the housing ( 1 ) and cooperates with a valve closing body ( 8 ) which is connected to the first sealing point ( 5 ) by a force-transmitting connection actuating part ( 9 ) can be actuated. 6. Druckmittelspeicher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Sensor, vorzugsweise ein Wegsensor, zur Überwachung der Funktion des Speicherschließventils (4) vorgesehen ist. 6. Pressure medium accumulator according to one of the preceding claims, characterized in that a sensor, preferably a displacement sensor, is provided for monitoring the function of the accumulator closing valve ( 4 ).
DE2001131658 2001-06-29 2001-06-29 Brake fluid store for use in motor vehicle brake system has closing off valve with double sealing points to reduce chance of leakage causing harm to chamber separating metallic bellows arrangement Withdrawn DE10131658A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2001131658 DE10131658A1 (en) 2001-06-29 2001-06-29 Brake fluid store for use in motor vehicle brake system has closing off valve with double sealing points to reduce chance of leakage causing harm to chamber separating metallic bellows arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2001131658 DE10131658A1 (en) 2001-06-29 2001-06-29 Brake fluid store for use in motor vehicle brake system has closing off valve with double sealing points to reduce chance of leakage causing harm to chamber separating metallic bellows arrangement

Publications (1)

Publication Number Publication Date
DE10131658A1 true DE10131658A1 (en) 2003-01-16

Family

ID=7690088

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2001131658 Withdrawn DE10131658A1 (en) 2001-06-29 2001-06-29 Brake fluid store for use in motor vehicle brake system has closing off valve with double sealing points to reduce chance of leakage causing harm to chamber separating metallic bellows arrangement

Country Status (1)

Country Link
DE (1) DE10131658A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10305000A1 (en) * 2003-02-07 2004-08-26 Carl Freudenberg Kg Metallic bellows pressure accumulator for a hydraulic system, e.g. a motor vehicle braking system, has a pressure sensor and evaluation unit for early detection of its faulty operation
DE102008016354A1 (en) * 2007-08-28 2009-05-28 Continental Teves Ag & Co. Ohg Pressure reservoir for use in brake system of motor vehicle, has metal bellow cooperating with protection valve that is formed to prevent supply of fluid by closing supply opening during reaching preset deformation
DE10355321B4 (en) * 2003-11-27 2014-10-30 Robert Bosch Gmbh Pressure accumulator for a hydraulic system with improved defect detection and method for defect detection in a memory

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10305000A1 (en) * 2003-02-07 2004-08-26 Carl Freudenberg Kg Metallic bellows pressure accumulator for a hydraulic system, e.g. a motor vehicle braking system, has a pressure sensor and evaluation unit for early detection of its faulty operation
DE10305000B4 (en) * 2003-02-07 2005-02-03 Carl Freudenberg Kg Metal bellows accumulator for hydraulic systems
DE10355321B4 (en) * 2003-11-27 2014-10-30 Robert Bosch Gmbh Pressure accumulator for a hydraulic system with improved defect detection and method for defect detection in a memory
DE102008016354A1 (en) * 2007-08-28 2009-05-28 Continental Teves Ag & Co. Ohg Pressure reservoir for use in brake system of motor vehicle, has metal bellow cooperating with protection valve that is formed to prevent supply of fluid by closing supply opening during reaching preset deformation

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