DE19539779A1 - Storage chamber for brake fluid in vehicle braking installation - Google Patents

Storage chamber for brake fluid in vehicle braking installation

Info

Publication number
DE19539779A1
DE19539779A1 DE1995139779 DE19539779A DE19539779A1 DE 19539779 A1 DE19539779 A1 DE 19539779A1 DE 1995139779 DE1995139779 DE 1995139779 DE 19539779 A DE19539779 A DE 19539779A DE 19539779 A1 DE19539779 A1 DE 19539779A1
Authority
DE
Germany
Prior art keywords
storage chamber
brake fluid
bore
vehicle braking
chamber according
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Withdrawn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
DE1995139779
Other languages
German (de)
Inventor
Friedrich Dipl Ing Megerle
Ulrich Dipl Ing Kolb
Stefan Dipl Ing Lehenberger
Peter Dipl Ing Zimmermann
Andrew-James Griffiths
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.)
Robert Bosch GmbH
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 DE1995139779 priority Critical patent/DE19539779A1/en
Priority to JP27662196A priority patent/JPH09132131A/en
Publication of DE19539779A1 publication Critical patent/DE19539779A1/en
Withdrawn legal-status Critical Current

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
    • B60T13/148Arrangements for pressure supply
    • 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
    • B60T8/42Arrangements 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 having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4275Pump-back systems

Abstract

A storage chamber(s) for brake fluid in a hydraulic vehicle braking installation, incorporates a unit which can change the chamber volume and which is self resetting. The chamber(s) is surrounded by fixed wells (1, 3), and has at least one inner compressible member (8). The inner area preferably contains an elastomeric material, preferably an EPDM hollow sphere.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Speicherkammer nach der Gattung des Patentanspruchs 1.The invention relates to a storage chamber according to the Genus of claim 1.

Es ist schon eine derartige Speicherkammer bekannt (DE 42 02 905 A1) Diese ist in einer Bohrung des Gehäuses eines Hydroaggregats einer hydraulischen Fahrzeug-Bremsanla­ ge mit Schlupfregelung ausgebildet. Eine solche Bremsanlage ist beispielsweise in der Druckschrift DE 41 21 604 A1 beschrieben. In der Bohrung ist ein verschiebbarer, unter der Kraft einer vorgespannten Druckfeder stehender Kolben angeordnet. Dieser ist gegen die Mantelwand der Bohrung mit einem Dichtungsring abgedichtet. Mündungsseitig ist in der Bohrung ein den Luftaustausch zulassender Verschlußdeckel aufgenommen, an dessen Innenseite die Druckfeder angreift.Such a storage chamber is already known (DE 42 02 905 A1) This is in a hole in the housing of a hydraulic unit of a hydraulic vehicle brake system trained with slip control. Such a braking system is for example in the publication DE 41 21 604 A1 described. In the hole is a sliding, under the force of a preloaded compression spring standing piston arranged. This is against the jacket wall of the bore sealed with a sealing ring. Mouth side is in the Bore in a cover that allows air exchange added, on the inside of which the compression spring engages.

Das Speichervolumen der Speicherkammer ist im wesentlichen durch den zwischen Bohrungsgrund und Kolbenstirnseite gele­ genen Raum der Bohrung gegeben. Bei Zufuhr von Bremsflüssig­ keit wird das Speichervolumen durch Verschieben des Kolbens entgegen Federkraft vergrößert. Bei Entnahme von Bremsflüs­ sigkeit gleicht die Feder durch Verschieben des Kolbens in Richtung auf den Bohrungsgrund die Volumenminderung aus. Der Kolben mit Feder stellt daher eine das Speichervolumen ver­ ändernde, selbstrückstellende Einrichtung dar.The storage volume of the storage chamber is essentially through the gel between the bottom of the bore and the face of the piston given space of the hole. When brake fluid is supplied The storage volume is increased by moving the piston enlarged against spring force. When removing brake rivers liquid balances the spring by moving the piston in Direction towards the bottom of the bore. Of the  Piston with spring therefore adjusts the storage volume changing, self-resetting facility.

Die Speicherkammer ist ein mit relativ hohem Kostenaufwand herzustellendes Element der schlupfgeregelten Fahrzeug- Bremsanlage. Die Bohrung und der Kolben müssen mit großer Präzision ihrer Gleitflächen gefertigt werden, um die Bewe­ gung und die Abdichtung der Kolbens sicherzustellen. Für eine verkantungsfreie Führung des Kolbens bedarf dieser einer Mindestlänge, durch welche die Tiefe der Bohrung ver­ größert wird. Demgegenüber nimmt das maximale Speichervolu­ men nur einen kleinen Teil des Bohrungsvolumens ein. Ferner ist die Montage der erwähnten Einzelteile der Speicherkammer arbeitsaufwendig.The storage chamber is a relatively expensive one element of the slip-controlled vehicle to be manufactured Braking system. The bore and the piston must be large Precision of their sliding surfaces are made to move the be and ensure the sealing of the pistons. For this requires a tilt-free guidance of the piston a minimum length through which the depth of the hole ver is enlarged. In contrast, the maximum storage volum only a small part of the bore volume. Further is the assembly of the individual parts of the storage chamber mentioned labor-intensive.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Speicherkammer mit den kennzeichnenden Merkmalen des Patentanspruchs 1 hat demgegenüber den Vor­ teil, daß gleitbewegliche Teile zur Veränderung des Spei­ chervolumens völlig entbehrlich sind. Es ist lediglich der kompressible, das heißt auf Zufuhr oder Entnahme von Brems­ flüssigkeit volumenveränderliche Körper in der Speicherkam­ mer enthalten. Die Bohrung der Speicherkammer kann daher mit relativ großen Toleranzen gefertigt werden. Da mit der Bohrungswand zusammenwirkende, gleitverschiebbare Teile feh­ len, tritt kein Verschleiß der Bohrung auf. Schließlich ist die Montage gegenüber dem bekannten Entwicklungsstand erheb­ lich vereinfacht.The storage chamber according to the invention with the characteristic In contrast, features of claim 1 has the front part that slidable parts for changing the Spei chervolumens are completely unnecessary. It's just that compressible, that is to say when the brake is applied or removed liquid volatile bodies in the storage chamber always included. The hole in the storage chamber can therefore be used relatively large tolerances are manufactured. As with the Bore wall interacting, sliding parts feh len, no wear of the bore occurs. Finally is the assembly compared to the known level of development simplified.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Patentanspruch 1 angegebenen Speicherkammer möglich. Zeichnung
Ein Ausführungsbeispiel der erfindungsgemäßen Speicherkammer ist in einem Schnitt eines Gehäuseteils dargestellt und in der nachfolgenden Beschreibung näher erläutert.
The measures listed in the subclaims allow advantageous developments and improvements of the storage chamber specified in claim 1. drawing
An embodiment of the storage chamber according to the invention is shown in a section of a housing part and explained in more detail in the following description.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Ein in der Zeichnung nur zum Teil wiedergegebenes Gehäuse 1 eines Hydroaggregats einer Schlupfregeleinrichtung von Fahr­ zeug-Bremsanlagen, beispielsweise gemäß DE 41 21 604 A1, weist eine Sacklochbohrung 2 auf, welche mündungsseitig durch einen Verschlußdeckel 3 dicht verschlossen ist. Der mit Preßsitz in der Bohrung 2 aufgenommene Verschlußdeckel ist durch eine Prägeverbindung 4, die durch Verdrängen von Gehäusewerkstoff an der Bohrungsmündung erzeugt ist, gegen Austritt aus der Bohrung gesichert. Der zwischen dem Ver­ schlußdeckel 3 und dem Grund der Sacklochbohrung 2 gelegene Raum bildet eine Speicherkammer 5, deren axiale Tiefe etwa dem Durchmesser der Bohrung entspricht. In die Speicher­ kammer 5 mündet am Grund der Bohrung 2 eine Leitung 6 ein, welche mit nicht dargestellten Bremszylindern eines Brems­ kreises der Fahrzeugs-Bremsanlage zugeordneten Auslaßventi­ len in Verbindung steht. Zwischen den Auslaßventilen und der Speicherkammer 5 ist an die Leitung 6 eine Rückförderpumpe 7 angeschlossen (in der Zeichnung lediglich als Symbol darge­ stellt).A in the drawing only partially shown housing 1 of a hydraulic unit of a slip control device of vehicle brake systems, for example according to DE 41 21 604 A1, has a blind hole 2 , which is sealed on the mouth side by a cover 3 . The sealing cap received with a press fit in the bore 2 is secured against escaping from the bore by an embossed connection 4 , which is produced by displacing the housing material at the bore mouth. The located between the United closing cover 3 and the bottom of the blind hole 2 forms a storage chamber 5 , the axial depth of which corresponds approximately to the diameter of the bore. In the storage chamber 5 opens at the bottom of the bore 2, a line 6 , which is associated with not shown brake cylinders of a brake circuit of the vehicle brake system associated Auslaßventi len. Between the outlet valves and the storage chamber 5 , a return pump 7 is connected to the line 6 (in the drawing only represents Darge).

In der Speicherkammer 5 ist eine Hohlkugel 8 mit einem Durchmesser aufgenommen, welcher nahezu demjenigen der Sack­ lochbohrung 2 entspricht. Der nicht von der Hohlkugel 8 ein­ genommene Innenraum der Speicherkammer 5 ist mit Brems­ flüssigkeit gefüllt. Die Hohlkugel 8 besteht aus Ethylen- Propylen-Dien-Kautschuk (EPDM), einem gegen Bremsflüssigkeit beständigen Elastomer. In der Hohlkugel 8 befindet sich Luft unter Atmosphärendruck. Die vorzugsweise nahtlos gefertigte Wandung der Hohlkugel 8 stellt sicher, daß weder Brems­ flüssigkeit in das Innere der Hohlkugel gelangt noch Luft in die Bremsflüssigkeit diffundiert.In the storage chamber 5 , a hollow ball 8 is received with a diameter which almost corresponds to that of the blind hole 2 . The not taken from the hollow ball 8 an interior of the storage chamber 5 is filled with brake fluid. The hollow ball 8 consists of ethylene-propylene-diene rubber (EPDM), an elastomer that is resistant to brake fluid. In the hollow ball 8 there is air under atmospheric pressure. The preferably seamless wall of the hollow ball 8 ensures that neither brake fluid gets into the interior of the hollow ball nor air diffuses into the brake fluid.

Bei einer Schlupfregelung wird dem Bremszylinder eines Blockiergefahr unterworfenen Fahrzeugrades Bremsflüssigkeit durch Öffnen des zugeordneten Auslaßventils entnommen. Diese unter Druck stehende Bremsflüssigkeit gelangt durch die Lei­ tung 6 zur Rückförderpumpe 7 sowie in die Speicherkammer 5. Hierdurch unterliegt die Hohlkugel 8 einer Volumenminderung, bis ein Gleichgewichtszustand zwischen dem Druck der zuströ­ menden Bremsflüssigkeit und dem Innendruck der Kugel herge­ stellt ist. Dabei entspricht das aktuelle Speichervolumen der Speicherkammer 5 der Volumenminderung der Hohlkugel 8. Das maximale Speichervolumen ist erreicht, wenn die Hohlku­ gel 8 völlig zusammengepreßt ist. Die während der Brems­ flüssigkeitsentnahme aus dem Radbremszylinder bereits för­ dernde Pumpe 7 entnimmt nun der Speicherkammer 5 Brems­ flüssigkeit im tJmfang des aktuellen Speichervolumens, bis die Hohlkugel 8 ihre ursprüngliche Größe erreicht hat, und fördert die Bremsflüssigkeit zurück in den Bremskreis. Damit erreicht die Speicherkammer 5 wieder ihre maximale Aufnahme­ kapazität.In the case of a slip control, brake fluid is removed from the brake cylinder of a vehicle wheel subject to a risk of locking by opening the assigned exhaust valve. This pressurized brake fluid passes through the line 6 to the return pump 7 and into the storage chamber 5th As a result, the hollow ball 8 is subject to a reduction in volume until an equilibrium state between the pressure of the inflowing brake fluid and the internal pressure of the ball is produced. The current storage volume of the storage chamber 5 corresponds to the volume reduction of the hollow sphere 8 . The maximum storage volume is reached when the Hohlku gel 8 is fully compressed. The already during the brake fluid removal from the wheel brake cylinder pump 7 now takes the storage chamber 5 brake fluid in the tJmange the current storage volume until the hollow ball 8 has reached its original size, and promotes the brake fluid back into the brake circuit. Thus, the storage chamber 5 again reaches its maximum capacity.

In Abwandlung des Ausführungsbeispiels können in der allsei­ tig durch feststehende Wände begrenzten Speicherkammer 5 auch zwei oder mehr kompressible Körper aufgenommen sein. Diese können gasgefüllte Hohlkörper anderer Form als beschrieben, beispielsweise als Ellipsoid, Hohlzylinder, Quader, Würfel oder Vieleck ausgebildet sein. Darüber hinaus können auch andere geeignete elastomere Werkstoffe Anwendung finden.In a modification of the embodiment, two or more compressible bodies can also be accommodated in the storage chamber 5 delimited by fixed walls. These can be gas-filled hollow bodies of a shape other than that described, for example in the form of an ellipsoid, hollow cylinder, cuboid, cube or polygon. Other suitable elastomeric materials can also be used.

Claims (5)

1. Speicherkammer (5) für Bremsflüssigkeit einer hydrauli­ schen Fahrzeug-Bremsanlage, mit einer das Speichervolumen verändernden, selbstrückstellenden Einrichtung, dadurch gekennzeichnet, daß die Speicherkammer (5) allseitig durch feststehende Wände (1, 3) begrenzt und in ihrem Innenraum wenigstens ein kompressibler Körper (8) aufgenommen ist.1. Storage chamber ( 5 ) for brake fluid of a hydraulic vehicle's brake system, with a changing the storage volume, self-resetting device, characterized in that the storage chamber ( 5 ) bounded on all sides by fixed walls ( 1 , 3 ) and in its interior at least one compressible Body ( 8 ) is added. 2. Speicherkammer nach Anspruch 1, dadurch gekennzeichnet, daß im Innenraum ein gasgefüllter Hohlkörper (8) aus einem elastormeren Werkstoff angeordnet ist.2. Storage chamber according to claim 1, characterized in that a gas-filled hollow body ( 8 ) made of an elastomeric material is arranged in the interior. 3. Speicherkammer nach Anspruch 2, dadurch gekennzeichnet, daß der Hohlkörper eine unter Atmosphärendruck luftgefüllte Hohlkugel (8) aus Ethylen-Propylen-Dien-Kautschuk (EPDM) ist.3. Storage chamber according to claim 2, characterized in that the hollow body is an air-filled hollow sphere ( 8 ) made of ethylene-propylene-diene rubber (EPDM) under atmospheric pressure. 4. Speicherkammer nach Anspruch 1, dadurch gekennzeichnet, daß die in einer Bohrung (2) eines Gehäuses (1) ausgebildete Speicherkammer (5) mündungsseitig durch einen eingepreßten Verschlußdeckel (3) verschlossen ist.4. Storage chamber according to claim 1, characterized in that in a bore ( 2 ) of a housing ( 1 ) formed storage chamber ( 5 ) on the mouth side is closed by a pressed-in cover ( 3 ). 5. Speicherkammer nach Anspruch 4, dadurch gekennzeichnet, daß der Verschlußdeckel (3) mündungsseitig der Bohrung (2) durch eine Prägeverbindung (4) am Gehäuse (1) befestigt ist.5. Storage chamber according to claim 4, characterized in that the closure cover ( 3 ) on the mouth side of the bore ( 2 ) is fastened to the housing ( 1 ) by an embossed connection ( 4 ).
DE1995139779 1995-10-26 1995-10-26 Storage chamber for brake fluid in vehicle braking installation Withdrawn DE19539779A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1995139779 DE19539779A1 (en) 1995-10-26 1995-10-26 Storage chamber for brake fluid in vehicle braking installation
JP27662196A JPH09132131A (en) 1995-10-26 1996-10-18 Storage chamber for braking liquid for hydraulic type vehicle - braking equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1995139779 DE19539779A1 (en) 1995-10-26 1995-10-26 Storage chamber for brake fluid in vehicle braking installation

Publications (1)

Publication Number Publication Date
DE19539779A1 true DE19539779A1 (en) 1997-04-30

Family

ID=7775774

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1995139779 Withdrawn DE19539779A1 (en) 1995-10-26 1995-10-26 Storage chamber for brake fluid in vehicle braking installation

Country Status (2)

Country Link
JP (1) JPH09132131A (en)
DE (1) DE19539779A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000034096A1 (en) * 1998-12-09 2000-06-15 Zf Friedrichshafen Ag Vibration damper for damping fluid vibrations in a hydraulic system
WO2009103709A1 (en) * 2008-02-18 2009-08-27 Continental Teves Ag & Co. Ohg Pulsation damping capsule

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6237484B2 (en) 2014-06-12 2017-11-29 株式会社アドヴィックス Hydraulic unit for vehicle brake system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000034096A1 (en) * 1998-12-09 2000-06-15 Zf Friedrichshafen Ag Vibration damper for damping fluid vibrations in a hydraulic system
US6669309B1 (en) 1998-12-09 2003-12-30 Zf Friedrichshafen Ag vibration damper for damping fluid vibrations in a hydraulic system
WO2009103709A1 (en) * 2008-02-18 2009-08-27 Continental Teves Ag & Co. Ohg Pulsation damping capsule
US8757212B2 (en) 2008-02-18 2014-06-24 Continental Teves Ag & Co. Ohg Pulsation damping capsule

Also Published As

Publication number Publication date
JPH09132131A (en) 1997-05-20

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