EP0529017A1 - Anti-lock hydraulic brake installation - Google Patents

Anti-lock hydraulic brake installation

Info

Publication number
EP0529017A1
EP0529017A1 EP19920904046 EP92904046A EP0529017A1 EP 0529017 A1 EP0529017 A1 EP 0529017A1 EP 19920904046 EP19920904046 EP 19920904046 EP 92904046 A EP92904046 A EP 92904046A EP 0529017 A1 EP0529017 A1 EP 0529017A1
Authority
EP
European Patent Office
Prior art keywords
pressure
valve
brake
wheel brake
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Withdrawn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
EP19920904046
Other languages
German (de)
French (fr)
Inventor
Joachim Maas
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.)
ITT Automotive Europe GmbH
Original Assignee
ITT Automotive Europe GmbH
Alfred Teves 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 ITT Automotive Europe GmbH, Alfred Teves GmbH filed Critical ITT Automotive Europe GmbH
Publication of EP0529017A1 publication Critical patent/EP0529017A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60T8/42—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 having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4275—Pump-back systems
    • B60T8/4291—Pump-back systems having means to reduce or eliminate pedal kick-back
    • 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
    • B60T8/42—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 having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4275—Pump-back systems
    • B60T8/4283—Pump-back systems having a pressure sensitive inlet 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
    • 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
    • B60T8/50—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 having means for controlling the rate at which pressure is reapplied to or released from the brake
    • B60T8/5087—Pressure release using restrictions
    • B60T8/5093—Pressure release using restrictions in hydraulic brake systems

Definitions

  • the invention relates to an anti-lock, hydraulic brake system with a master cylinder and at least one wheel brake, which connects to the master cylinder via a brake line, a separating valve for blocking the master cylinder with respect to the pressure medium circuit, a pressure medium collector, which acts on the wheel brake connects, an outlet valve in the connection of the wheel brake / pressure medium collector, and a pump which connects to the pressure medium collector with its suction side.
  • telbar in the wheel brake.
  • the pressure control is therefore only with one valve. Although this causes simple control, at the same time the control options are restricted. In particular, no pressure maintenance phase can be implemented. It is known to provide a further valve (a so-called inlet valve) in the connection between the pump and the wheel brake with which the wheel brake can be cut off from a pressure medium supply. However, it has been shown that high switching noises are associated with the actuation of this inlet valve. The increased control comfort is purchased with the disadvantage that the system has increased noise emissions.
  • the invention is therefore based on the object of creating an anti-lock hydraulic brake system which operates with little noise and has a high level of control convenience.
  • a pressure maintenance phase should be able to be realized.
  • the object is achieved in that a valve is provided in the connection between the pressure medium collector and the pump. This valve takes over the task of the inlet valve, which is otherwise usually provided between the pump and the wheel brake. A high level of control comfort can therefore be achieved. Since the valve is not in the high-pressure area of the system, the switching noise is low.
  • a low-pressure accumulator can be provided as the pressure medium collector, but it would also be conceivable to use a pressure medium storage container which is open to the atmosphere and is arranged in an open control loop.
  • a switchable throttle valve can be assigned to the outlet valve, with which an additional throttle in the connection when a defined pressure in the wheel brake is reached is switched on between the wheel brake and the pressure medium collector.
  • the brake system consists of a master cylinder 1, to which a wheel brake 4 connects via a brake line 3.
  • a separating valve 2 which has two switching positions, is inserted into the brake line 3. In the basic position there is a free passage of pressure medium, while in the switching position a check valve is active, which opens towards the main brake cylinder.
  • the wheel brake 4 is connected to a low-pressure accumulator 10 via a return line 5.
  • An outlet valve 8 is inserted into the return line 5 and is actuated electromagnetically and blocks the return line 5 in its basic position. In the switch position, the return line 5 is released.
  • the low-pressure accumulator has a spring-loaded piston 11, which is connected to the isolating valve 2 via a mechanical device 12. As long as the low pressure accumulator 10 is not filled, the isolating valve is held in its basic position. When the outlet valve 8 is opened and the low-pressure accumulator 10 is filled, the isolating valve 2 is released so that it is brought into its switching position.
  • a pump 7 is connected to the low-pressure accumulator 10 via a suction line 6 and its pressure side connects to the brake line 3 between the wheel brake 4 and the isolating valve 2.
  • the suction line 6 there is a switching valve 9 which is actuated electromagnetically and which keeps the suction line open in its basic position. In the switching position, the suction line 6 is blocked.
  • a throttle valve 13 can be provided in the return line 5. This valve is actuated by the pressure in the wheel brake. As soon as a certain pressure is reached in the wheel brake, the valve switches from an open to a throttle position.
  • the brake system works as follows:
  • the switching valve 9 is switched into its blocking position, so that the pump 7, which is preferably a non-self-priming pump, cannot deliver from the low-pressure accumulator.
  • the switching valve 9 is opened so that the pump 7 sucks pressure medium and promotes back into the wheel brake 4.
  • exhaust valve 8 and switching valve 9 are blocked, the pressure in the wheel brake is maintained.
  • a pressure build-up and pressure reduction phase as well as a pressure maintenance phase can therefore be implemented.
  • the control comfort is great. Since the switching valve 9, which takes over the function of an inlet valve, is arranged on the suction side of the pump 7, there are no high pressure surges when the switching valve closes, so that the noise level is low.
  • the throttle valve ensures that there is a uniform pressure reduction per unit of time, regardless of the level of the wheel brake pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

Il est présenté un système de freinage hydraulique à dispositif antiblocage, au moyen duquel sont réalisables aussi bien une phase de montée en pression, une phase de baisse de pression, qu'une phase de maintien de pression. A cet effet, une soupape de sortie (8) et une soupape de commande (9) sont prévues, lesquelles ne sont pas, comme d'habitude, disposées du côté refoulement de la pompe, mais du côté aspiration. Cela a pour avantage que la soupape de commande (9) est disposée dans la zone de basse pression du système de freinage, de manière à ne pas déclencher, lors d'opérations de commande, de grands chocs de pression susceptibles d'entraîner une émission de bruit.There is presented a hydraulic braking system with anti-lock device, by means of which a pressure build-up phase, a pressure drop phase, as well as a pressure maintenance phase can be produced. For this purpose, an outlet valve (8) and a control valve (9) are provided, which are not, as usual, arranged on the discharge side of the pump, but on the suction side. This has the advantage that the control valve (9) is arranged in the low pressure area of the braking system, so as not to trigger, during control operations, large pressure shocks likely to cause emission. noise.

Description

Blockiergeschützte, hydraulische Bremsanlage Anti-lock, hydraulic brake system
Die Erfindung bezieht sich auf eine blockiergeschützte, hy¬ draulische Bremsanlage mit einem Haupzylinder und mindestens einer Radbremse, die über eine Bremsleitung an den HauptZy¬ linder anschließt, einem Trennventil zum Sperren des Haupt¬ zylinders gegenüber dem Druckmittelkreis, einen Druckmittel¬ sammler, der an die Radbremse anschließt, einem Auslaßventil in der Verbindung Radbremse/Druckmittelsammler, und einer Pumpe, die mit ihrer Saugseite an den Druckmittelsammler an¬ schließt.The invention relates to an anti-lock, hydraulic brake system with a master cylinder and at least one wheel brake, which connects to the master cylinder via a brake line, a separating valve for blocking the master cylinder with respect to the pressure medium circuit, a pressure medium collector, which acts on the wheel brake connects, an outlet valve in the connection of the wheel brake / pressure medium collector, and a pump which connects to the pressure medium collector with its suction side.
Aus dem Stand der Technik (GB 20 56 606 A) ist eine blockiergeschützte, hydraulische Bremsanlage bekannt, die die oben genannten Merkmale aufweist. Um den Druck in der Radbremse zu senken, wird das Auslaßventil geöffnet, so daß Druckmittel in den Druckmittelsammler abfließen kann. Beim DruckmittelSammler handelt es sich um einen Niederdruckspei¬ cher, dessen Kolben gleichzeitig als Ventilkörper für das Trennventil fungiert. Dies bewirkt, daß mit Befüllen des Niederdruckspeichers automatisch das Trennventil geschlossen wird. Die Pumpe fördert aus dem Niederdruckspeicher unmit¬From the prior art (GB 20 56 606 A) an anti-lock hydraulic brake system is known which has the above-mentioned features. In order to lower the pressure in the wheel brake, the outlet valve is opened so that pressure medium can flow into the pressure medium collector. The pressure medium collector is a low-pressure accumulator, the piston of which simultaneously functions as a valve body for the isolating valve. This causes the isolating valve to be closed automatically when the low-pressure accumulator is filled. The pump immediately delivers from the low pressure accumulator
_• telbar in die Radbremse. Die Druckregelung erfolgt also nur mit einem Ventil. Dies bewirkt zwar eine einfache Ansteue- rung, gleichzeitig sind aber die Regelungsmöglichkeiten ein¬ geschränkt. Insbesondere kann keine Druckhaltephase reali¬ siert werden. Zwar ist es bekannt, in der Verbindung zwischen Pumpe und Radbremse ein weiteres Ventil (ein sogenanntes Einlaßventil) vorzusehen mit dem die Radbremse von einer Druckmittelzufuhr abgeschnitten werden kann. Es hat sich aber gezeigt, daß mit Betätigen dieses Einlaßventils hohe Schaltgeräusche verbun¬ den sind. Der erhöhte Regelkomfort wird mit dem Nachteil er¬ kauft, daß die Anlage eine verstärkte Geräuschemission auf¬ weist._ • telbar in the wheel brake. The pressure control is therefore only with one valve. Although this causes simple control, at the same time the control options are restricted. In particular, no pressure maintenance phase can be implemented. It is known to provide a further valve (a so-called inlet valve) in the connection between the pump and the wheel brake with which the wheel brake can be cut off from a pressure medium supply. However, it has been shown that high switching noises are associated with the actuation of this inlet valve. The increased control comfort is purchased with the disadvantage that the system has increased noise emissions.
Die Erfindung beruht daher auf der Aufgabe, eine blockierge¬ schützte, hydraulische Bremsanlage zu schaffen, die ge¬ räuscharm arbeitet und einen hohen Regelkomfort aufweist. Insbesondere soll eine Druckhaltephase realisiert werden könne .The invention is therefore based on the object of creating an anti-lock hydraulic brake system which operates with little noise and has a high level of control convenience. In particular, a pressure maintenance phase should be able to be realized.
Die Aufgabe wird dadurch gelöst, daß ein Ventil in der Ver¬ bindung zwischen dem Druckmittelsammler und der Pumpe vorge¬ sehen wird. Dieses Ventil übernimmt die Aufgabe des Einla߬ ventils, das ansonsten üblicherweise zwischen der Pumpe und der Radbremse vorgesehen ist. Es kann daher ein hoher Regel¬ komfort erzielt werden. Da sich das Ventil nicht im Hoch¬ druckbereich der Anlage befindet, sind die Schaltgeräusche gering.The object is achieved in that a valve is provided in the connection between the pressure medium collector and the pump. This valve takes over the task of the inlet valve, which is otherwise usually provided between the pump and the wheel brake. A high level of control comfort can therefore be achieved. Since the valve is not in the high-pressure area of the system, the switching noise is low.
Als Druckmittelsammler kann insbesondere ein Niederdruck¬ speicher vorgesehen werden, denkbar wäre aber auch die Ver¬ wendung eines Druckmittelvorratsbehälters, der zur Atmos¬ phäre hin offen, und in einem offenen Regelkreis angeordnet ist.In particular, a low-pressure accumulator can be provided as the pressure medium collector, but it would also be conceivable to use a pressure medium storage container which is open to the atmosphere and is arranged in an open control loop.
Dem Auslaßventil kann ein schaltbares Drosselventil zugeord¬ net werden, mit dem bei Erreichen eines definierten Drucks in der Radbremse eine zusätzliche Drossel in die Verbindung zwischen der Radbremse und dem Druckmittelsammler einge¬ schaltet wird.A switchable throttle valve can be assigned to the outlet valve, with which an additional throttle in the connection when a defined pressure in the wheel brake is reached is switched on between the wheel brake and the pressure medium collector.
Im folgenden soll anhand eines Ausführungsbeispieles darge¬ stellt in der beiliegenden Figur der Erfindungsgedanke näher verdeutlicht werden. Dargestellt ist lediglich eine Radbrem¬ se. Bei der Anwendung dieses Systems auf ein Vierradfahrzeug ist natürlich das dargestellte System bei jeder zu regelnden Radbremse oder Radbremsgruppe einzusetzen.In the following, the idea of the invention will be illustrated in more detail in the attached figure using an exemplary embodiment. Only one wheel brake is shown. When this system is applied to a four-wheel vehicle, the system shown is of course to be used with each wheel brake or wheel brake group to be controlled.
Die Bremsanlage besteht aus einem Hauptzylinder 1, an den über eine Bremsleitung 3 eine Radbremse 4 anschließt. In die Bremsleitung 3 eingefügt ist ein Trennventil 2, das zwei Schaltstellungen aufweist. In der Grundstellung besteht ein freier Druckmitteldurchgang während in der Schaltposition ein Rückschlagventil wirksam wird, das zum HauptbremsZylin¬ der hin öffnet.The brake system consists of a master cylinder 1, to which a wheel brake 4 connects via a brake line 3. A separating valve 2, which has two switching positions, is inserted into the brake line 3. In the basic position there is a free passage of pressure medium, while in the switching position a check valve is active, which opens towards the main brake cylinder.
Die Radbremse 4 ist über eine Rücklaufleitung 5 mit einem Niederdruckspeicher 10 verbunden. In die Rücklaufleitung 5 eingefügt ist ein Auslaßventil 8, das elektromagnetisch be¬ tätigt wird und in seiner Grundstellung die Rücklaufleitung 5 sperrt. In der Schaltstellung wird die Rücklaufleitung 5 freigegeben.The wheel brake 4 is connected to a low-pressure accumulator 10 via a return line 5. An outlet valve 8 is inserted into the return line 5 and is actuated electromagnetically and blocks the return line 5 in its basic position. In the switch position, the return line 5 is released.
Der Niederdruckspeicher weist einen federbelasteten Kolben 11 auf, der über eine mechanische Vorrichtung 12 mit dem Trennventil 2 verbunden ist. Solange der Niederdruckspeicher 10 nicht gefüllt ist, wird das Trennventil in seiner Grund¬ stellung gehalten. Mit öffnen des Auslaßventils 8 und Befül- len des Niederdruckspeichers 10 wird das Trennventil 2 frei¬ gegeben, so daß es in seine Schaltstellung gebracht wird. An den Niederdruckspeicher 10 schließt über eine Saugleitung 6 eine Pumpe 7 an, die mit ihrer Druckseite an die Bremslei¬ tung 3 zwischen der Radbremse 4 und dem Trennventil 2 an¬ schließt. In der Saugleitung 6 befindet sich ein Schaltven¬ til 9, das elektromagnetisch betätigt wird und in seiner Grundstellung die Saugleitung offen hält. In der Schaltstel¬ lung ist eine Sperrung der Saugleitung 6 vorgesehen.The low-pressure accumulator has a spring-loaded piston 11, which is connected to the isolating valve 2 via a mechanical device 12. As long as the low pressure accumulator 10 is not filled, the isolating valve is held in its basic position. When the outlet valve 8 is opened and the low-pressure accumulator 10 is filled, the isolating valve 2 is released so that it is brought into its switching position. A pump 7 is connected to the low-pressure accumulator 10 via a suction line 6 and its pressure side connects to the brake line 3 between the wheel brake 4 and the isolating valve 2. In the suction line 6 there is a switching valve 9 which is actuated electromagnetically and which keeps the suction line open in its basic position. In the switching position, the suction line 6 is blocked.
Zusätzlich kann noch ein Drosselventil 13 vorgesehen werden und zwar in der Rücklaufleitung 5. Dieses Ventil wird vom Druck in der Radbremse betätigt. Sobald ein bestimmter Druck in der Radbremse erreicht wird, schaltet das Ventil von ei¬ ner Offen- in eine Drosselstellung.In addition, a throttle valve 13 can be provided in the return line 5. This valve is actuated by the pressure in the wheel brake. As soon as a certain pressure is reached in the wheel brake, the valve switches from an open to a throttle position.
Die Bremsanlage arbeitet wie folgt:The brake system works as follows:
Mit Betätigen des Hauptzylinders 1 wird ein Druck im Brems- kreis aufgebaut, der zur Betätigung der Radbremse 4 führt. Dies führt zu einer Radverzögerung und in Folge zu einer Fahrzeugverzögerung. Das Drehverhalten des Rades wird lau¬ fend mittels eines nicht dargestellten Sensors erfaßt, des¬ sen Signale von einer ebenfalls nicht dargestellten elektro¬ nischen Auswerteeinheit registriert werden. Stellt diese fest, daß das Rad zu blockieren droht, so setzt der Blockierschutzmodus ein. Dieser beinhaltet, daß die Pumpe 7 eingeschaltet wird und in einem ersten Schritt das Ausla߬ ventil öffnet. Dadurch fließt Druckmittel aus der Radbremse 4 in den Niederdruckspeicher 10 ab, wodurch, wie erläutert, das Trennventil 2 schließt. Dadurch erfolgt ein Druckabbau. Gleichzeitig wird das Schaltventil 9 in seine Sperrstellung geschaltet, so daß die Pumpe 7, bei der es sich vorzugsweise um eine nicht selbstansaugende Pumpe handelt, nicht aus dem Niederdruckspeicher fördern kann. Um einen erneuten Druck- aufbau zu erzielen, wird das Schaltventil 9 geöffnet, so daß die Pumpe 7 Druckmittel ansaugt und zurück in die Radbremse 4 fördert. Wenn Auslaßventil 8 und Schaltventil 9 gesperrt sind, wird der Druck in der Radbremse gehalten. Es kann da¬ her sowohl eine Druckaufbauphase und Druckabbauphase als auch eine Druckhaltephase realisiert werden. Der Regelkom¬ fort ist groß. Da das Schaltventil 9, das die Funktion eines Einlaßventils übernimmt, an der Saugseite der Pumpe 7 ange¬ ordnet ist, entstehen keine hohen Druckstöße beim Schließen des Schaltventils, so daß die Geräuschentwicklung gering ist.When the master cylinder 1 is actuated, a pressure is built up in the brake circuit, which leads to the actuation of the wheel brake 4. This leads to wheel deceleration and consequently to vehicle deceleration. The rotational behavior of the wheel is continuously detected by means of a sensor, not shown, whose signals are registered by an electronic evaluation unit, also not shown. If this detects that the wheel threatens to lock, the anti-lock mode starts. This means that the pump 7 is switched on and opens the outlet valve in a first step. As a result, pressure medium flows out of the wheel brake 4 into the low-pressure accumulator 10, as a result of which, as explained, the isolating valve 2 closes. This leads to a reduction in pressure. At the same time, the switching valve 9 is switched into its blocking position, so that the pump 7, which is preferably a non-self-priming pump, cannot deliver from the low-pressure accumulator. To print again To achieve construction, the switching valve 9 is opened so that the pump 7 sucks pressure medium and promotes back into the wheel brake 4. When exhaust valve 8 and switching valve 9 are blocked, the pressure in the wheel brake is maintained. A pressure build-up and pressure reduction phase as well as a pressure maintenance phase can therefore be implemented. The control comfort is great. Since the switching valve 9, which takes over the function of an inlet valve, is arranged on the suction side of the pump 7, there are no high pressure surges when the switching valve closes, so that the noise level is low.
Das Drosselventil bewirkt, daß in etwa unabhängig von der Höhe des Radbremsdruckes ein gleichmäßiger Druckabbau pro Zeiteinheit erfolgt. The throttle valve ensures that there is a uniform pressure reduction per unit of time, regardless of the level of the wheel brake pressure.

Claims

Patentansprüche Claims
1. Blockiergeschützte, hydraulische Bremsanlage mit einem Hauptzylinder,1. Anti-lock, hydraulic brake system with a master cylinder,
- mindestens einer Radbremse, einer Bremsleitung, die den Hauptzylinder mit der Radbremse verbindet und ein Trennventil aufweist zum Sperren des HauptZylinders gegenüber dem Brems- kreis, einem Druckmittelsammler, der über ein Auslaßventil an die Radbremse anschließt,at least one wheel brake, a brake line which connects the master cylinder to the wheel brake and has a separating valve for blocking the master cylinder with respect to the brake circuit, a pressure medium collector which connects to the wheel brake via an outlet valve,
- einer Pumpe, die mit ihrer Saugseite an den Druck¬ mittelsammler und mit ihrer Druckmittelseite an die Radbremse anschließt, dadurch g e k e n n z e i c h n e t, daß die Pumpe (7) mit ihrer Druckseite unmittelbar an die Radbremse (4) und mit ihrer Saugseite an den Druckmittelsammler über ein Schaltventil (9) anschließt.- A pump which connects with its suction side to the pressure medium collector and with its pressure medium side to the wheel brake, characterized in that the pump (7) with its pressure side directly to the wheel brake (4) and with its suction side to the pressure medium collector via Switching valve (9) connects.
2. Bremsanlage nach Anspruch 1, dadurch g e k e n n ¬ z e i c h n e t, daß der Druckmittelsammler durch einen Niederdruckspeicher (10) dargestellt ist.2. Brake system according to claim 1, characterized in that the pressure medium collector is represented by a low-pressure accumulator (10).
3. Bremsanlage nach Anspruch 2, dadurch g e k e n n ¬ z e i c h n e t, daß das Trennventil mechanisch mit dem Kolben (11) des Niederdruckspeichers (10) verbunden ist.3. Brake system according to claim 2, characterized in that the isolating valve is mechanically connected to the piston (11) of the low-pressure accumulator (10).
4. Bremsanläge nach Anspruch 1, dadurch g e k e n n ¬ z e i c h n e t, daß in der Rücklaufleitung (5) ein schaltbares Drosselventil (13) vorgesehen ist. 4. Brake system according to claim 1, characterized in that a switchable throttle valve (13) is provided in the return line (5).
5. Bremsanlage nach einem der vorhergehenden Ansprüche, da¬ durch g e k e n n z e i c h n e t, daß das Auslaßventil (8) und das Schaltventil (9) elektromagnetisch betätigt werden. 5. Brake system according to one of the preceding claims, da¬ by g e k e n n z e i c h n e t that the exhaust valve (8) and the switching valve (9) are actuated electromagnetically.
EP19920904046 1991-03-16 1992-02-06 Anti-lock hydraulic brake installation Withdrawn EP0529017A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4108640 1991-03-16
DE19914108640 DE4108640A1 (en) 1991-03-16 1991-03-16 BLOCK-PROTECTED, HYDRAULIC BRAKE SYSTEM

Publications (1)

Publication Number Publication Date
EP0529017A1 true EP0529017A1 (en) 1993-03-03

Family

ID=6427486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920904046 Withdrawn EP0529017A1 (en) 1991-03-16 1992-02-06 Anti-lock hydraulic brake installation

Country Status (4)

Country Link
EP (1) EP0529017A1 (en)
JP (1) JPH06500514A (en)
DE (1) DE4108640A1 (en)
WO (1) WO1992016399A1 (en)

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Publication number Priority date Publication date Assignee Title
JPH0661631U (en) * 1993-02-16 1994-08-30 住友電気工業株式会社 Antilock modulator
FR2705633B1 (en) * 1993-05-25 1995-07-13 Alliedsignal Europ Services Hydraulic circuit with distributor capacity.
DE4319161A1 (en) * 1993-06-09 1994-12-15 Teves Gmbh Alfred Slip-controlled hydraulic brake system
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JPH06500514A (en) 1994-01-20
WO1992016399A1 (en) 1992-10-01
DE4108640A1 (en) 1992-09-17

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