DE102010040380A1 - Hydraulic unit for brake assembly of motor vehicle, has filter element which is arranged between low pressure storage section and pumping suction path which is connected to pressure retention valve and reversing valve - Google Patents

Hydraulic unit for brake assembly of motor vehicle, has filter element which is arranged between low pressure storage section and pumping suction path which is connected to pressure retention valve and reversing valve Download PDF

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Publication number
DE102010040380A1
DE102010040380A1 DE102010040380A DE102010040380A DE102010040380A1 DE 102010040380 A1 DE102010040380 A1 DE 102010040380A1 DE 102010040380 A DE102010040380 A DE 102010040380A DE 102010040380 A DE102010040380 A DE 102010040380A DE 102010040380 A1 DE102010040380 A1 DE 102010040380A1
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Prior art keywords
hydraulic unit
suction path
pressure accumulator
low
filter element
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DE102010040380A
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German (de)
Inventor
Dieter Dinkel
Kristijan Tarandek
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Continental Teves AG and Co OHG
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Continental Teves AG and Co OHG
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Priority to DE102010040380A priority Critical patent/DE102010040380A1/en
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    • 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
    • B60T8/36—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 including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
    • B60T8/368—Electromagnetic 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
    • 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
    • B60T13/142—Systems with master cylinder
    • B60T13/147—In combination with distributor valve
    • 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
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • 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
    • B60T8/48—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 connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems

Abstract

The hydraulic unit (15) has a pumping suction path (3) which is connected with low pressure storage section (2) and exhaust valve (6). A pressure retention valve (5) is arranged at downstream of storage section. The suction path connected to pump (13) is connected to the downstream of pressure retention valve, and is connected to reversing valve (21) which is closed in normal position. A filter element (4) is arranged between storage section and terminal end (1) of suction path, for filtering the pressure fluid leaking out from storage section toward suction path.

Description

Die Erfindung betrifft ein Hydraulikaggregat für eine Kraftfahrzeugbremsanlage nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a hydraulic unit for a motor vehicle brake system according to the preamble of patent claim 1.

Ein Hydraulikaggregat für eine Kraftfahrzeugbremsanlage der angegebenen Art ist aus EP 0 950 004 B1 bekannt. Das Hydraulikaggregat weist stromabwärts zu den Auslassventilen einen Pumpensaugpfad auf, an den ein Niederdruckspeicher angeschlossen ist, dem ein Druckrückhalteventil nachgeordnet ist, über das der Pumpensaugpfad einerseits an einer Pumpe angeschlossen ist. Weiterhin ist der Pumpensaugpfad mittels eines in Grundstellung geschlossenen Umschaltventils normalerweise von einem zu einem Bremsdruckgeber führenden Druckmittelanschluss getrennt.A hydraulic power unit for a motor vehicle brake system of the type specified is out EP 0 950 004 B1 known. The hydraulic unit has downstream of the exhaust valves to a pump suction, to which a low-pressure accumulator is connected, which is arranged downstream of a pressure retention valve, via which the pump suction on the one hand connected to a pump. Furthermore, the pump suction path is normally separated from a pressure medium connection leading to a brake pressure generator by means of a reversing valve closed in the basic position.

In einen für die Bevorratung des Druckmittels im Niederdruckspeicher vorgesehenen Speicherraum ist ein translatorisch bewegter Speicherkolben flüssigkeitsdicht aufgenommen, der in der Regel einen Dichtring aufweist, der einem gewissen Verschleiß unterworfen ist, sodass Verschleißpartikel in den Pumpensaugpfad eingespült werden können, die nicht nur zur Pumpe gelangen, sondern auch zu einer Kontamination des elektrischen Umschaltventils führen und die im Falle einer Rückströmung des Druckmittels auch die Auslassventile verunreinigen.In a space provided for the storage of the pressure medium in the low-pressure accumulator storage space, a translationally moving accumulator piston is liquid-tight, which usually has a sealing ring which is subjected to a certain wear, so that wear particles can be flushed into the Pumpensaugpfad not only reach the pump but also lead to contamination of the electrical switching valve and contaminate in the case of a backflow of the pressure medium and the exhaust valves.

Die Aufgabe der Erfindung ist es nunmehr, ein Hydraulikaggregat der angegebenen Art dahingehend zu verbessern, dass mit möglichst geringem konstruktiven als auch funktionellen Aufwand eine Kontamination des Pumpensaugpfades sowohl in Richtung des elektrischen Umschaltventils als auch in Richtung der Auslassventile sicher verhindert wird falls Druckmittel aus dem Niederdruckspeicher zu den Auslassventilen rückströmen sollte.The object of the invention is therefore to improve a hydraulic unit of the specified type to the effect that with the least possible constructive and functional effort contamination of the pump suction both in the direction of the electric switching valve and in the direction of the exhaust valves is reliably prevented if pressure medium from the low-pressure accumulator should flow back to the exhaust valves.

Diese Aufgabe wird erfindungsgemäß für ein Hydraulikaggregat der genannten Art durch die Merkmale des Patentanspruchs 1 gelöst.This object is achieved for a hydraulic unit of the type mentioned by the features of claim 1.

Weitere Merkmale der Erfindung sind den einzelnen Patentansprüchen als auch aus der Beschreibung zweier Ausführungsbeispiele zu entnehmen.Further features of the invention can be taken from the individual claims as well as from the description of two embodiments.

Es zeigen:Show it:

1 einen Hydraulikschaltplan zur erfindungsgemäßen Anordnung eines Filterelements außerhalb des Niederdruckspeichers, 1 a hydraulic circuit diagram for the inventive arrangement of a filter element outside the low-pressure accumulator,

2 die erfindungsgemäße Anordnung des Filterelements innerhalb des Niederdruckspeichers. 2 the inventive arrangement of the filter element within the low-pressure accumulator.

Die 1 zeigt in prinzipieller Darstellung den schaltungstechnischen Aufbau innerhalb eines Hydraulikaggregates 15 für eine Kraftfahrzeugbremsanlage, die nach dem Rückförderprinzip arbeitet. Gezeigt sind die beiden baugleichen Bremskreise einer als Zweikreisbremsanlage ausgeführten Schaltungsanordnung. Ein erster und zweiten Hauptzylinderanschluss 14 der Zweikreisbremsanlage verbindet das Hydraulikaggregat 15 mit einem Bremsdruckgeber 16, wobei die Hauptzylinderanschlüsse 14 innerhalb des Hydraulikaggregates 2 über mehrere in jedem der beiden Bremskreise angeordnete Druckregelventile mit den Radbremsanschlüssen 17 verbunden sind, an denen jeweils ein Paar Radbremsen 19 angeschlossen sind. Jeder Radbremse 19 sind zur Druckregelung innerhalb des Hydraulikaggregates 15 ein Einlass- und Auslassventil 20, 6 zugeordnet, wobei stromabwärts zu jedem Auslassventil 6 ein Pumpensaugpfad 3 angeschlossen ist, der über ein Druckrückhalteventil 5 einerseits mit einer Pumpe 13 verbunden ist, andererseits aber über ein in Grundstellung geschlossenes Umschaltventil 21 vom Bremsdruckgeber 16 getrennt ist.The 1 shows a schematic representation of the circuit design within a hydraulic unit 15 for a motor vehicle brake system which operates according to the return flow principle. Shown are the two identical brake circuits designed as a dual-circuit brake circuit. A first and second master cylinder connection 14 The dual-circuit brake system connects the hydraulic power unit 15 with a brake pressure transducer 16 , wherein the master cylinder connections 14 within the hydraulic unit 2 via a plurality of arranged in each of the two brake circuits pressure control valves with the Radbremsanschlüssen 17 are connected to each of which a pair of wheel brakes 19 are connected. Every wheel brake 19 are for pressure control within the hydraulic unit 15 an inlet and outlet valve 20 . 6 associated with downstream to each exhaust valve 6 a pump suction path 3 connected via a pressure retention valve 5 on the one hand with a pump 13 is connected, on the other hand, however, via a closed in the basic position switching valve 21 from the brake pressure transducer 16 is disconnected.

Gemäß der gezeigten Ventilgrundstellung der elektromagnetisch betätigbaren Druckregelventile sind die beiden Einlassventile 20 als auch ein zwischen dem Hauptzylinderanschluss 14 und stromaufwärts zu den Einlassventilen 20 in der Bremsleitung eines jeden Bremskreises angeordnete Trennventil 22 in der Grundstellung stromlos geöffnet. Das stromaufwärts zum Pumpendruckanschluss in jede Bremsleitung eingesetzte Trennventil 22 ermöglicht somit in Verbindung mit den Ein- und Auslassventilen 20, 6 über die eigentliche Blockierschutzregelfunktion hinaus für jedem Bremskreis eine Antriebsschlupfregelung als auch im Zusammenwirken mit dem elektrisch betätigbaren Umschaltventil 21 einen autonomen Bremsenbetrieb, beispielsweise zum Zwecke einer Fahrdynamikregelung.According to the illustrated basic valve position of the electromagnetically actuated pressure regulating valves, the two intake valves 20 as well as between the master cylinder port 14 and upstream of the intake valves 20 arranged in the brake line of each brake circuit isolation valve 22 normally open in the normal position. The isolation valve used upstream of the pump pressure port in each brake line 22 thus enables in conjunction with the intake and exhaust valves 20 . 6 over the actual anti-lock control function for each brake circuit a traction control as well as in cooperation with the electrically actuated changeover valve 21 an autonomous brake operation, for example, for the purpose of driving dynamics control.

Wie eingangs bereits erwähnt, ist der an den Auslassventilen 6 angeschlossene Pumpensaugpfad 3 einerseits über das dem Niederdruckspeicher 2 nachgeordnete Druckrückhalteventil 5 mit der Pumpe 13 verbunden, andererseits besteht aber auch eine hydraulische Verbindung der Pumpenpfades 3 zu dem in Grundstellung geschlossenen Umschaltventil 21, sodass darauf geachtet werden muss, dass durch den Niederdruckspeicher 2 keine Kontamination des Pumpensaugpfades 3 sowohl in Richtung des elektrischen Umschaltventils 21 als auch bei einer Rückströmung des aus dem Niederdruckspeicher 2 austretenden Druckmittels in Richtung der Auslassventile 6 erfolgt, die zu einer Beeinträchtigung der Auslass- als auch Umschaltventilfunktion führen könnte. Daher wird nunmehr gemäß der Erfindung vorgeschlagen, dass zwischen einem Anschluss 1 des Niederdruckspeichers 2 an den Pumpensaugpfad 3 ein Filterelement 4 angeordnet ist, das ein aus dem Niederdruckspeicher 2 in Richtung des Pumpensaugpfades 3 ausströmendes Druckmittel hinreichend filtert.As already mentioned, it is the one on the exhaust valves 6 connected pump suction path 3 on the one hand via the low-pressure accumulator 2 downstream pressure retention valve 5 with the pump 13 connected, on the other hand, however, there is also a hydraulic connection of the pump path 3 to the closed in the basic position switching valve 21 , so that care must be taken that through the low-pressure accumulator 2 no contamination of the pump suction path 3 both in the direction of the electrical switching valve 21 as well as with a backflow of the from the low-pressure accumulator 2 escaping pressure medium in the direction of the exhaust valves 6 takes place, which could lead to a deterioration of the exhaust as well as switching valve function. Therefore, it is now proposed according to the invention that between a port 1 the low-pressure accumulator 2 to the pump suction path 3 a filter element 4 is arranged, one from the Low-pressure accumulator 2 in the direction of the pump suction path 3 adequately filters escaping pressure medium.

Aus der 1 geht hierzu im Detail hervor, dass der Anschluss 1 des Niederdruckspeichers 2 an den Pumpensaugpfad 3 als Knoten- bzw. Verteilerpunkt zwischen dem in den Pumpensaugpfad 3 eingesetzten Druckrückhalteventil 5 und den an den Pumpensaugpfad 3 angeschlossenen Auslassventilen 6 vorgesehen ist, sodass mit lediglich einem einzigen Filterelement 4 sowohl in Richtung des Umschaltventils 21 als auch in Richtung der Auslassventile 6 auf möglichst einfache Weise eine Filterung des aus dem Niederdruckspeicher 2 austretenden Druckmittels erfolgt.From the 1 goes into detail that the connection 1 the low-pressure accumulator 2 to the pump suction path 3 as a node or distribution point between the pump suction path 3 used pressure retention valve 5 and the pump suction path 3 connected exhaust valves 6 is provided so that with only a single filter element 4 both in the direction of the changeover valve 21 as well as in the direction of the exhaust valves 6 in the simplest possible way a filtering of the from the low-pressure accumulator 2 exiting pressure medium takes place.

Gemäß dem Hydraulikschaltplan nach 1 ist das Filterelement 4 in einem zwischen dem Niederdruckspeicher 2 und dem Anschluss 1 des Niederdruckspeichers 2 an den Pumpensaugpfad 3 angeordneten Verbindungskanal 7 eingesetzt. Eine hierzu alternative, bauraumoptimierte Ausführung der Erfindung geht nachfolgend aus einer Schnittzeichnung durch das Hydraulikaggregat 15 nach 2 hervor.According to the hydraulic circuit diagram 1 is the filter element 4 in one between the low pressure accumulator 2 and the connection 1 the low-pressure accumulator 2 to the pump suction path 3 arranged connection channel 7 used. An alternative construction space-optimized embodiment of the invention, which is an alternative, follows from a sectional drawing through the hydraulic unit 15 to 2 out.

Die 2 zeigt einen Ausschnitt des Hydraulikaggregats 15 im Bereich des Niederdruckspeichers 2, woraus zu erkennen ist, dass das Filterelement 4 unmittelbar in einem Speicherraum 8 des Niederdruckspeichers 2 eingesetzt ist, dessen Speichervolumen von einem im Speicherraum 8 flüssigkeitsdicht eingesetzten Speicherkolben 9 variabel einstellbar ist. Vorteilhaft ist das Filterelement 4 als Ringfilter ausgeführt, dessen Filtergewebe 10 als Einsatz- oder Spritzgießteil in einem Ringträger 11 aufgenommen ist, der vorzugsweise aus einem Kunststoff hergestellt ist. Das scheibenförmige Filterelement 4 ist mittels einer Presspassung im Niederdruckspeicher 2 fixier, wobei zur möglichst einfachen Abdichtung des Filterelements 5 im Speicherraum 8 der Ringträger 11 entlang seinem Umfang eine radiale Dichtfläche 12 aufweist.The 2 shows a section of the hydraulic unit 15 in the area of the low pressure accumulator 2 , from which it can be seen that the filter element 4 immediately in a memory space 8th the low-pressure accumulator 2 is used, the storage volume of a in the storage space 8th liquid-tight storage piston used 9 is variably adjustable. The filter element is advantageous 4 designed as a ring filter whose filter fabric 10 as an insert or injection molded part in a ring carrier 11 is received, which is preferably made of a plastic. The disc-shaped filter element 4 is by means of a press fit in the low-pressure accumulator 2 fixier, wherein the simplest possible sealing of the filter element 5 in the storage room 8th the ring bearer 11 along its circumference a radial sealing surface 12 having.

Die hydraulische Verbindung des Speicherraums 8 mit dem Pumpensaugpfad 3 erfolgt nach 2 konstruktiv über drei von oben in die Sackbohrung des Niederdruckspeichers 2 einmündende Anschlüsse 1a, 1b, 1c, wovon ein erster und zweiter Anschluss 1a, 1b jeweils zu den Ausgängen der beiden Auslassventile 6 eines Bremskreises führen, während der zwischen dem ersten und zweiten Anschluss 1a, 1b angeordnete, zur Pumpensaugseite und dem Umschaltventil 21 führende dritte Anschluss 1c in einer Vertiefung das stromaufwärts zur Pumpe 13 angeordnete Druckrückhalteventil 5 aufnimmt. Somit ist auf einfache Weise sichergestellt, dass etwaige durch den Speicherkolben 9 und/oder dessen Ringdichtung 18 verschleißbedingte Verunreinigungen infolge des zwischen dem Speicherkolben 9 und den Anschlüssen 1a, 1b, 1c angeordneten Filterelements 4 nicht in den Pumpensaugpfad 3 gelangen.The hydraulic connection of the storage space 8th with the pump suction path 3 takes place after 2 constructive about three from the top into the blind hole of the low-pressure accumulator 2 opening connections 1a . 1b . 1c of which a first and second connection 1a . 1b each to the outputs of the two exhaust valves 6 a brake circuit, while that between the first and second connection 1a . 1b arranged, to the pump suction side and the switching valve 21 leading third port 1c in a depression upstream of the pump 13 arranged pressure retention valve 5 receives. Thus, it is easily ensured that any through the accumulator piston 9 and / or its ring seal 18 wear-related contamination due to the between the accumulator piston 9 and the connections 1a . 1b . 1c arranged filter element 4 not in the pump suction path 3 reach.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Anschlussconnection
22
NiederdruckspeicherLow-pressure accumulator
33
PumpensaugpfadPumpensaugpfad
44
Filterelementfilter element
55
DruckrückhalteventilPressure retention valve
66
Auslassventiloutlet valve
77
Verbindungskanalconnecting channel
88th
Speicherraumstorage space
99
Speicherkolbenaccumulator piston
1010
Filtergewebefilter cloth
1111
RingträgerRingbearer
1212
Dichtflächesealing surface
1313
Pumpepump
1414
HauptzylinderanschlussMaster cylinder connection
1515
Hydraulikaggregathydraulic power unit
1616
BremsdruckgeberBrake pressure transducer
1717
Radbremsanschlüssewheel brake
1818
Ringdichtungring seal
1919
Radbremsewheel brake
2020
Einlassventilintake valve
2121
Umschaltventilswitching valve
2222
Trennventilisolation valve

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • EP 0950004 B1 [0002] EP 0950004 B1 [0002]

Claims (9)

Hydraulikaggregat für eine Kraftfahrzeugbremsanlage, die nach dem Rückförderprinzip arbeitet, mit einem Hauptzylinderanschluss am Hydraulikaggregat für einen Bremsdruckgeber, mit als Ein- und Auslassventilen ausgeführte Druckregelventilen in einem zumindest teilweise im Hydraulikaggregat vorhandenen Bremskreis, der über Radbremsanschlüsse am Hydraulikaggregat mit wenigstens einem Paar Radbremsen verbunden ist, mit einem im Hydraulikaggregat stromabwärts zu den Auslassventilen angeordneten Pumpensaugpfad, an den ein Niederdruckspeicher angeschlossen ist, sowie mit einem im Hydraulikaggregat dem Niederdruckspeicher nachgeordneten Druckrückhalteventil, über das der Pumpensaugpfad einerseits an einer Pumpe angeschlossen ist, andererseits mittels eines in Grundstellung geschlossenen Umschaltventils vom zum Bremsdruckgeber führenden Hauptzylinderanschluss getrennt ist, dadurch gekennzeichnet, dass zwischen einem Anschluss (1) des Niederdruckspeichers (2) an den Pumpensaugpfad (3) ein Filterelement (4) angeordnet ist, das ein aus dem Niederdruckspeicher (2) in Richtung des Pumpensaugpfades (3) ausströmendes Druckmittel filtert.Hydraulic unit for a motor vehicle brake system, which operates on the Rückförderprinzip, with a master cylinder connection on the hydraulic unit for a brake pressure generator, designed as inlet and outlet pressure control valves in an existing at least partially in the hydraulic unit brake circuit which is connected via wheel brake connections on the hydraulic unit with at least one pair of wheel brakes, with a arranged in the hydraulic unit downstream of the exhaust valves Pumpensaugpfad to which a low-pressure accumulator is connected, and with a low pressure accumulator downstream of the hydraulic accumulator pressure retention valve, via which the Pumpenensaugpfad is connected on the one hand to a pump, on the other hand by means of a switch closed in the basic position switching from leading to the brake pressure transducer Master cylinder connection is separated, characterized in that between a connection ( 1 ) of the low pressure accumulator ( 2 ) to the pump suction path ( 3 ) a filter element ( 4 ) is arranged, the one from the low-pressure accumulator ( 2 ) in the direction of the pump suction path ( 3 ) leaking pressure fluid filters. Hydraulikaggregat nach Anspruch 1, dadurch gekennzeichnet, dass der Anschluss (1) des Niederdruckspeichers (2) an den Pumpensaugpfad (3) zwischen dem in den Pumpensaugpfad (3) eingesetzten Druckrückhalteventil (5) und den an den Pumpensaugpfad (3) angeschlossenen Auslassventilen (6) vorgesehen ist.Hydraulic unit according to claim 1, characterized in that the connection ( 1 ) of the low pressure accumulator ( 2 ) to the pump suction path ( 3 ) between the pump suction path ( 3 ) used pressure retention valve ( 5 ) and the pump suction path ( 3 ) connected exhaust valves ( 6 ) is provided. Hydraulikaggregat nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Filterelement (4) in einem zwischen dem Niederdruckspeicher (2) und dem Anschluss (1) des Niederdruckspeichers (2) an den Pumpensaugpfad (3) angeordneten Verbindungskanal (7) eingesetzt ist.Hydraulic unit according to claim 1 or 2, characterized in that the filter element ( 4 ) in one between the low-pressure accumulator ( 2 ) and the connection ( 1 ) of the low pressure accumulator ( 2 ) to the pump suction path ( 3 ) arranged connecting channel ( 7 ) is used. Hydraulikaggregat nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Filterelement (4) unmittelbar in den Niederdruckspeicher (2) eingesetzt ist.Hydraulic unit according to claim 1 or 2, characterized in that the filter element ( 4 ) directly into the low-pressure accumulator ( 2 ) is used. Hydraulikaggregat nach Anspruch 4, dadurch gekennzeichnet, dass das Filterelement (4) in einem Speicherraum (8) des Niederdruckspeichers (2) fixiert ist, dessen Speichervolumen von einem im Speicherraum (8) flüssigkeitsdicht eingesetzten Speicherkolben (9) variabel einstellbar ist.Hydraulic unit according to claim 4, characterized in that the filter element ( 4 ) in a memory space ( 8th ) of the low pressure accumulator ( 2 ), the storage volume of which is stored in memory space ( 8th ) liquid-tight inserted storage piston ( 9 ) is variably adjustable. Hydraulikaggregat nach Anspruch 5, dadurch gekennzeichnet, dass das Filterelement (4) als Ringfilter ausgeführt ist, dessen Filtergewebe (10) als Einsatz- oder Spritzgießteil in einem Ringträger (11) aufgenommen ist, der vorzugsweise aus einem Kunststoff hergestellt ist.Hydraulic unit according to claim 5, characterized in that the filter element ( 4 ) is designed as a ring filter whose filter fabric ( 10 ) as an insert or injection molded part in a ring carrier ( 11 ) is received, which is preferably made of a plastic. Hydraulikaggregat nach Anspruch 6, dadurch gekennzeichnet, dass der Ringträger (11) entlang seinem Umfang eine radiale Dichtfläche (12) aufweist.Hydraulic unit according to claim 6, characterized in that the ring carrier ( 11 ) along its circumference a radial sealing surface ( 12 ) having. Hydraulikaggregat nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das Filterelement (4) mittels einer Presspassung im Niederdruckspeicher (2) fixiert ist.Hydraulic unit according to one of claims 4 to 6, characterized in that the filter element ( 4 ) by means of a press fit in the low pressure accumulator ( 2 ) is fixed. Hydraulikaggregat nach Anspruch 1, dadurch gekennzeichnet, dass drei mit dem Pumpensaugpfad (3) in Verbindung stehende Anschlüsse (1a, 1b, 1c) in den Niederdruckspeicher (2) einmünden, wovon ein erster und zweiter Anschluss (1a, 1b) zu den Ausgängen der beiden Auslassventile (6) eines Bremskreises führen, während der dritte Anschluss (1c) das stromaufwärts zur Pumpe (13) angeordnete Druckrückhalteventil (5) aufnimmt.Hydraulic unit according to claim 1, characterized in that three with the pump suction path ( 3 ) related connections ( 1a . 1b . 1c ) in the low-pressure accumulator ( 2 ), of which a first and second connection ( 1a . 1b ) to the outputs of the two exhaust valves ( 6 ) of a brake circuit, while the third connection ( 1c ) upstream of the pump ( 13 ) arranged pressure retention valve ( 5 ).
DE102010040380A 2010-09-08 2010-09-08 Hydraulic unit for brake assembly of motor vehicle, has filter element which is arranged between low pressure storage section and pumping suction path which is connected to pressure retention valve and reversing valve Withdrawn DE102010040380A1 (en)

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DE102010040380A DE102010040380A1 (en) 2010-09-08 2010-09-08 Hydraulic unit for brake assembly of motor vehicle, has filter element which is arranged between low pressure storage section and pumping suction path which is connected to pressure retention valve and reversing valve

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DE102010040380A DE102010040380A1 (en) 2010-09-08 2010-09-08 Hydraulic unit for brake assembly of motor vehicle, has filter element which is arranged between low pressure storage section and pumping suction path which is connected to pressure retention valve and reversing valve

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN114206696A (en) * 2019-08-19 2022-03-18 罗伯特·博世有限公司 Hydraulic block for a hydraulic unit of a hydraulic vehicle brake system

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DE9111860U1 (en) * 1991-09-23 1991-11-14 Abb Patent Gmbh, 6800 Mannheim, De
EP0950004B1 (en) 1997-01-09 2001-05-09 Continental Teves AG & Co. oHG Hydraulic unit
DE10016895A1 (en) * 2000-04-05 2001-10-18 Continental Teves Ag & Co Ohg Hydraulic block has piston movable in relation to wall of bore hydraulic block, and cover closing off accumulator is inseparably connected to hydraulic block, preferably by caulking or clinching
US20050028879A1 (en) * 2003-08-06 2005-02-10 Kenichi Suzuki Metal bellows hydraulic accumulator
DE102005004465A1 (en) * 2004-02-03 2005-09-01 Continental Teves Ag & Co. Ohg Automotive electro-hydraulic brake system back-pressure dampening module has hydraulic line and screen with bleed hole outside hydraulic control unit
DE102008002244A1 (en) * 2008-06-05 2009-12-10 Robert Bosch Gmbh A method for emptying a pressure fluid accumulator of an electronic slip-controlled hydraulic brake system of a motor vehicle or pressure reducing valve for use in such a method
DE102009028912A1 (en) * 2008-08-28 2010-03-04 Advics Co., Ltd., Kariya pressure regulating

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111860U1 (en) * 1991-09-23 1991-11-14 Abb Patent Gmbh, 6800 Mannheim, De
EP0950004B1 (en) 1997-01-09 2001-05-09 Continental Teves AG & Co. oHG Hydraulic unit
DE10016895A1 (en) * 2000-04-05 2001-10-18 Continental Teves Ag & Co Ohg Hydraulic block has piston movable in relation to wall of bore hydraulic block, and cover closing off accumulator is inseparably connected to hydraulic block, preferably by caulking or clinching
US20050028879A1 (en) * 2003-08-06 2005-02-10 Kenichi Suzuki Metal bellows hydraulic accumulator
DE102005004465A1 (en) * 2004-02-03 2005-09-01 Continental Teves Ag & Co. Ohg Automotive electro-hydraulic brake system back-pressure dampening module has hydraulic line and screen with bleed hole outside hydraulic control unit
DE102008002244A1 (en) * 2008-06-05 2009-12-10 Robert Bosch Gmbh A method for emptying a pressure fluid accumulator of an electronic slip-controlled hydraulic brake system of a motor vehicle or pressure reducing valve for use in such a method
DE102009028912A1 (en) * 2008-08-28 2010-03-04 Advics Co., Ltd., Kariya pressure regulating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114206696A (en) * 2019-08-19 2022-03-18 罗伯特·博世有限公司 Hydraulic block for a hydraulic unit of a hydraulic vehicle brake system
CN114206696B (en) * 2019-08-19 2024-03-22 罗伯特·博世有限公司 Hydraulic block for a hydraulic unit of a hydraulic vehicle brake system

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