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DE19850386A1 - Hydraulic brake system for regulated and gentle braking - Google Patents

Hydraulic brake system for regulated and gentle braking

Info

Publication number
DE19850386A1
DE19850386A1 DE19850386A DE19850386A DE19850386A1 DE 19850386 A1 DE19850386 A1 DE 19850386A1 DE 19850386 A DE19850386 A DE 19850386A DE 19850386 A DE19850386 A DE 19850386A DE 19850386 A1 DE19850386 A1 DE 19850386A1
Authority
DE
Germany
Prior art keywords
hydraulic
valve
pressure
brake system
brake
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Withdrawn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
DE19850386A
Other languages
German (de)
Inventor
Andreas Klein
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 DE19850386A priority Critical patent/DE19850386A1/en
Priority to DE59904457T priority patent/DE59904457D1/en
Priority to PCT/EP1999/003221 priority patent/WO1999058380A1/en
Priority to US09/674,438 priority patent/US6648423B1/en
Priority to EP99924933A priority patent/EP1077847B1/en
Priority to JP2000548201A priority patent/JP4819219B2/en
Publication of DE19850386A1 publication Critical patent/DE19850386A1/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Withdrawn legal-status Critical Current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
    • B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
    • B60T8/441—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters
    • B60T8/442—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters the booster being a fluid return pump, e.g. in combination with a brake pedal force booster
    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • 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
    • B60T8/3655—Continuously controlled electromagnetic valves
    • 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
    • B60T8/3655—Continuously controlled electromagnetic valves
    • B60T8/366—Valve details
    • 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
    • B60T8/404—Control of the pump unit
    • B60T8/4059—Control of the pump unit involving the rate of delivery
    • 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
    • B60T8/404—Control of the pump unit
    • B60T8/4063—Control of the pump unit involving the direction of fluid flow
    • 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
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
    • B60T8/4081—Systems with stroke simulating devices for driver input
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Controls For Constant Speed Travelling (AREA)
  • Regulating Braking Force (AREA)

Abstract

The hydraulic brake system includes a hydraulic pump (16) to build up a hydraulic pressure for braking, and a valve device by which this pressure can be reduced. The valve device is in the form of an analog valve. The analog valve and the hydraulic pump are controlled by a control device in such a manner that the brake pressure for gradual braking can be raised or reduced without apparent steps.

Description

Die Erfindung betrifft eine hydraulische Bremsanlage für Regel- und Komfortbremsungen, mit einer Hydraulikpumpe zum Aufbau eines eine Bremsung bewirkenden Hydraulikdrucks sowie einer Ventileinrichtung, über die der Hydraulikdruck abbaubar ist.The invention relates to a hydraulic brake system for Control and comfort braking, with a hydraulic pump for Build-up of a hydraulic pressure causing braking and a valve device via which the hydraulic pressure is degradable.

Hydraulische Bremsanlagen werden in zunehmendem Maße mit Einrichtungen ausgestattet, mit denen auch fremdgesteuerte Komfortbremsungen durchgeführt werden können. Im Gegensatz zu einer durch einen Fahrer bewirkten Regelbremsung, die im allgemeinen mit einer Antriebs- und/oder Bremsschlupfrege­ lung beaufschlagt wird, wird eine Komfortbremsung zum Beispiel durch einen Tempomat aktiviert. Ein Problem hier­ bei besteht jedoch darin, daß eine solche Komfortbremsung mit dosierter Bremskraft durchgeführt werden muß, da anson­ sten der Tempomat nicht mit ausreichender Genauigkeit und Stetigkeit betrieben werden kann.Hydraulic braking systems are increasingly using Equipped facilities with which also externally controlled Comfort braking can be carried out. In contrast to a regular braking effect caused by a driver, which in the generally with a drive and / or brake slip is applied, comfort braking to Example activated by cruise control. A problem here at, however, is that such comfort braking must be carried out with metered braking force, because otherwise the cruise control does not work with sufficient accuracy and Continuity can be operated.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine hy­ draulische Bremsanlage der eingangs genannten Art zu schaf­ fen, mit der zur Durchführung von Komfortbremsungen ein in kleinen Schritten kontinuierlich regelbarer Bremsdruck aus­ geübt werden kann.The invention is therefore based on the object, a hy to draulic braking system of the type mentioned fen with which to carry out comfort braking continuously adjustable brake pressure in small steps can be practiced.

Eine erste Lösung diese Aufgabe besteht bei einer hy­ draulischen Bremsanlage der genannten Art gemäß Anspruch 1 darin, daß die Ventileinrichtung ein analoges Ventil ist und daß das analoge Ventil und die Hydraulikpumpe durch eine Steuereinrichtung in der Weise ansteuerbar sind, daß der Bremsdruck für eine Komfortbremsung im wesentlichen stufenlos erhöht oder vermindert werden kann. A first solution to this problem is with a hy Draulic braking system of the type mentioned according to claim 1 in that the valve device is an analog valve and that the analog valve and the hydraulic pump through a control device can be controlled in such a way that the brake pressure for comfort braking essentially can be continuously increased or decreased.  

Eine zweite Lösung dieser Aufgabe besteht gemäß Anspruch 6 darin, daß die Ventileinrichtung durch ein für jede Rad­ bremse vorgesehenes analoges Dreiwegeventil gebildet ist, deren Eingänge mit der Druckseite der Hydraulikpumpe ver­ bunden sind, und deren erster Ausgang jeweils mit einer Radbremse und deren zweite Ausgänge mit einer Niederdruck­ seite der Bremsanlage verbunden sind, wobei die Drei­ wegeventile und die Hydraulikpumpe durch eine Steuerein­ richtung in der Weise ansteuerbar sind, daß der Bremsdruck für eine Komfortbremsung im wesentlichen stufenlos erhöht oder vermindert werden kann.A second solution to this problem is according to claim 6 in that the valve means by one for each wheel analog three-way valve is provided, whose inputs ver with the pressure side of the hydraulic pump are bound, and their first exit with one Wheel brake and its second outputs with a low pressure side of the brake system are connected, the three directional control valves and the hydraulic pump by a control unit direction can be controlled in such a way that the brake pressure for comfort braking essentially increased continuously or can be reduced.

Die Unteransprüche haben vorteilhafte Weiterbildungen der Erfindung zum Inhalt.The subclaims have advantageous developments of Invention to the content.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung von zwei bevor­ zugten Ausführungsformen anhand der Zeichnung. Es zeigt:Further details, features and advantages of the invention emerge from the following description of two before preferred embodiments with reference to the drawing. It shows:

Fig. 1 ein Prinzipschaltbild der ersten Ausführungsform und Fig. 1 is a schematic diagram of the first embodiment and

Fig. 2 ein Prinzipschaltbild der zweiten Ausführungsform. Fig. 2 is a schematic diagram of the second embodiment.

In den beiden Figuren ist jeweils nur ein Bremskreis 100 dargestellt, der auf zwei Radbremsen 11, 14 eines Fahrzeugs einwirkt. Der jeweils andere Bremskreis für die beiden an­ deren Radbremsen ist identisch aufgebaut und wurde deshalb aus Gründen der Übersichtlichkeit weggelassen.In each of the two figures, only one brake circuit 100 is shown, which acts on two wheel brakes 11 , 14 of a vehicle. The other brake circuit for the two on their wheel brakes is identical and was therefore omitted for reasons of clarity.

Die Bremskreise werden gemäß Fig. 1 von einem Haupt­ zylinder 1 beaufschlagt, der über einen Hydraulikvorrat 2 mit Hydraulikflüssigkeit versorgt wird. Der Hauptzylinder 1 wird über einen Bremskraftverstärker 3 mit einem Bremspedal 4 betätigt.The brake circuits are shown in FIG. 1 from a master cylinder 1 acted upon, which is supplied via a hydraulic reservoir 2 with hydraulic fluid. The master cylinder 1 is actuated via a brake booster 3 with a brake pedal 4 .

An den Hauptzylinder 1 ist an eine Bremsleitung 5 des Bremskreises 100 angeschlossen, die über ein analoges, stromlos offenes Ventil 6 geführt ist und sich an dessen Ausgang in einen ersten Bremszweig 7 und einen zweiten Bremszweig 8 verzweigt. Der erste Bremskreis führt über ein erstes, stromlos offenes Einlaßventil 9 in die erste Rad­ bremse 11, während der zweite Bremszweig 8 über ein zweites, stromlos offenes Einlaßventil 12 mit der zweiten Radbremse 14 verbunden ist.To the master cylinder 1 is connected to a brake line 5 of the brake circuit 100 , which is guided via an analog valve 6 that is open when de-energized and branches at the outlet thereof into a first brake branch 7 and a second brake branch 8 . The first brake circuit leads via a first, normally open inlet valve 9 into the first wheel brake 11 , while the second brake branch 8 is connected to the second wheel brake 14 via a second, normally open inlet valve 12 .

Über ein erstes, stromlos geschlossenes Auslaßventil 10 an der ersten Radbremse 11 ist eine Verbindung mit einer Nied­ erdruckseite des Bremskreises herstellbar. Gleiches gilt für ein zweites, stromlos geschlossenes Auslaßventil 13 an der zweiten Radbremse 14. Die Niederdruckseite wird von einem Niederdruckspeicher 15 beaufschlagt und ist über ein erstes Rückschlagventil 15a sowie ein erstes, stromlos geschlossenes Trennventil 18 mit dem Hydraulikvorrat 2 ver­ bindbar.A connection to a low pressure side of the brake circuit can be established via a first, normally closed exhaust valve 10 on the first wheel brake 11 . The same applies to a second, normally closed exhaust valve 13 on the second wheel brake 14 . The low-pressure side is acted upon by a low-pressure accumulator 15 and can be connected to the hydraulic supply 2 via a first check valve 15 a and a first, normally closed isolation valve 18 .

Mit der Niederdruckseite ist außerdem über ein zweites Rückschlagventil 16a die Ansaugseite einer Hydraulikpumpe 16 verbunden. Der Druckausgang dieser Pumpe führt über ein drittes Rückschlagventil 16b, eine Dämpfungskammer 17, sowie eine Blende 17a in die beiden Bremszweige 7, 8.The suction side of a hydraulic pump 16 is also connected to the low-pressure side via a second check valve 16 a. The pressure output of this pump leads via a third check valve 16 b, a damping chamber 17 and an orifice 17 a into the two brake branches 7 , 8 .

Im Hinblick auf eine von einem Fahrer bewirkte Regelbrem­ sung (d. h. eine Betätigung des Bremspedals 4) entspricht die Funktion dieser Ausführungsform derjenigen von bekannten Bremskreisen dieser Art, wobei zur Antriebs- bzw. Bremsschlupfregelung mittels Sensoren an jeder Radbremse die Hydraulikpumpe und die betreffenden Einlaß- und Auslaßventile entsprechend angesteuert werden.In view of a Regelbrem solution effected by a driver (ie an actuation of the brake pedal 4 ), the function of this embodiment corresponds to that of known brake circuits of this type, the drive and brake slip control using sensors on each wheel brake, the hydraulic pump and the relevant inlet and Exhaust valves are controlled accordingly.

Zur Durchführung einer Komfortbremsung, zum Beispiel durch einen Tempomat, dienen in erster Linie die Hydraulikpumpe 16 sowie das analoge Ventil 6. Die Hydraulikpumpe 16 be­ wirkt dabei einen Aufbau des Bremsdruckes in den Bremszwei­ gen 7, 8, während über das analoge Ventil 6 der Bremsdruck abbaubar ist. Diese Veränderungen des Bremsdruckes erfolgen stufenlos, indem die Hydraulikpumpe gepulst betrieben bzw. das Analogventil allmählich und kontrolliert durch Quer­ schnittsvergrößerung geöffnet wird.The hydraulic pump 16 and the analog valve 6 are primarily used to perform comfort braking, for example using a cruise control. The hydraulic pump 16 be acts to build up the brake pressure in the Bremszwei gene 7 , 8 , while via the analog valve 6, the brake pressure can be reduced. These changes in brake pressure are made continuously by operating the hydraulic pump in pulsed mode or opening the analog valve gradually and in a controlled manner by increasing the cross-section.

Im einzelnen wird bei einem Druckaufbau das analoge Ventil 6 geschlossen und das erste Trennventil 18 geöffnet. Die Hydraulikpumpe 16 kann dann Hydraulikflüssigkeit aus dem an den Hauptzylinder 1 angeschlossenen Hydraulik- Vorratsbehälter 2 ansaugen und in die beiden Bremszweige 7, 8 drücken. Bei einem Druckabbau wird das erste Trennventil 18 geschlossen, die Hydraulikpumpe 16 deaktiviert und das analoge Ventil 6 allmählich geöffnet.In particular, when the pressure builds up, the analog valve 6 is closed and the first isolating valve 18 is opened. The hydraulic pump 16 can then draw hydraulic fluid from the hydraulic reservoir 2 connected to the master cylinder 1 and press it into the two brake branches 7 , 8 . When the pressure drops, the first isolating valve 18 is closed, the hydraulic pump 16 deactivated and the analog valve 6 gradually opened.

Diese beiden Vorgänge können auch permanent und alternier­ end ablaufen, so daß eine kontinuierliche Druckregelung in kleinen Schritten möglich ist.These two processes can also be permanent and alternate end, so that a continuous pressure control in small steps is possible.

Das analoge Ventil ist vorzugsweise ein Sitzventil, dessen Magnetantrieb proportionalisiert ist.The analog valve is preferably a seat valve, the Magnetic drive is proportional.

Fig. 2 zeigt eine zweite Ausführungsform der Erfindung. Auch hierbei werden die beiden Radbremsen 11 und 14 über den Bremskreis 100 beaufschlagt, indem die auf das Brem­ spedal 4 ausgeübte Kraft von dem Bremskraftverstärker 3 verstärkt und über den Hauptzylinder 1, der mit dem Hy­ draulikvorrat 2 verbunden ist, in die Hydraulikflüssigkeit übertragen wird. Der Bremskreis 100 ist über die Bremslei­ tung 5 an den Hauptzylinder 1 angeschlossen. Die Bremslei­ tung 5 ist über ein zweites, stromlos offenes Trennventil 20 in die beiden Bremszweige 7, 8 geführt. Der erste Bremszweig 7 ist mit dem Eingang eines ersten Dreiwegeven­ tils 21 verbunden, an dessen erstem Ausgang die Radbremse 11 anliegt und dessen zweiter Ausgang mit der Niederdruck­ seite verbunden ist. Der zweite Bremszweig 8 ist an ein zweites Dreiwegeventil 22 geführt, dessen erster Ausgang mit der Radbremse 14 und dessen zweiter Ausgang mit der Niederdruckseite verbunden ist. Fig. 2 shows a second embodiment of the invention. Here, too, the two wheel brakes 11 and 14 are applied via the brake circuit 100 by the force exerted on the brake pedal 4 being amplified by the brake booster 3 and transmitted via the master cylinder 1 , which is connected to the hydraulic supply 2 , into the hydraulic fluid. The brake circuit 100 is connected via the Bremslei device 5 to the master cylinder 1 . The Bremslei device 5 is guided via a second, normally open isolation valve 20 in the two brake branches 7 , 8 . The first brake branch 7 is connected to the input of a first Dreiwegeven valve 21 , at whose first output the wheel brake 11 is applied and the second output is connected to the low pressure side. The second brake branch 8 is guided to a second three-way valve 22 , the first output of which is connected to the wheel brake 14 and the second output of which is connected to the low-pressure side.

Die analogen Dreiwegeventile sind vorzugsweise Schieberven­ tile mit integriertem Sitz.The analog three-way valves are preferably spool valves tile with integrated seat.

Der Niederdruckspeicher 15 beaufschlagt die Niederdruck­ seite und ist über das erstes Rückschlagventil 15a direkt mit dem Hydraulikvorrat 2 verbunden. Auch bei dieser Aus­ führungsform liegt die Ansaugseite der Hydraulikpumpe 16 über dem zweiten Rückschlagventil 16a an der Niederdruck­ seite an. Die Druckseite der Hydraulikpumpe 16 ist über das dritte Rückschlagventil 16b sowie die Dämpfungskammer 17 mit nachgeschalteter Blende 17a in die beiden Bremszweige 7, 8 geführt.The low pressure accumulator 15 acts on the low pressure side and is directly connected to the hydraulic supply 2 via the first check valve 15 a. In this embodiment, too, the suction side of the hydraulic pump 16 is above the second check valve 16 a on the low pressure side. The pressure side of the hydraulic pump 16 is guided via the third check valve 16 b and the damping chamber 17 with a downstream orifice 17 a into the two brake branches 7 , 8 .

Bei einer von einem Fahrer ausgeübten Regelbremsung wird der Bremsdruck über die Bremsleitung 5 und das zweite, stromlos offene Trennventil 20 in die Bremszweige 7, 8 ge­ leitet und beaufschlagt über das erste und zweite Drei­ wegeventil 21, 22 die zugeordnete Radbremse 11 bzw. 14. Eine Antriebs- und Bremsschlupfregelung erfolgt wiederum durch die an sich bekannte Ansteuerung der Hydraulikpumpe 16 sowie des zweiten Trennventils 20 und des betreffenden Dreiwegeventils 21 bzw. 22, wenn an dem zugeordneten Rad ein Schlupf erfaßt wurde. Das Dreiwegeventil erfüllt in diesem Fall die Funktionen des Einlaß- und des Auslaßven­ tils 9, 10 bzw. 12, 13 gemäß Fig. 1.In the case of control braking exercised by a driver, the brake pressure is passed via the brake line 5 and the second, normally open isolating valve 20 into the brake branches 7 , 8 and acts on the associated wheel brake 11 or 14 via the first and second three-way valve 21 , 22 . A drive and brake slip control is in turn carried out by the known control of the hydraulic pump 16 and the second isolating valve 20 and the relevant three-way valve 21 or 22 when a slip has been detected on the associated wheel. In this case, the three-way valve fulfills the functions of the inlet and outlet valves 9 , 10 and 12 , 13 according to FIG. 1.

Im Falle einer Komfortbremsung wird zur Druckerhöhung das zweite Trennventil 20 geschlossen und die Hydraulikpumpe 16 gepulst betrieben, so daß über die Dreiwegeventile 21, 22 der Bremsdruck in den Radbremsen 11, 14 analog, das heißt in kleinen Stufen allmählich aufgebaut wird. Zum Druckabbau wird die Hydraulikpumpe 16 deaktiviert, und die Drei­ wegeventile werden schrittweise kontinuierlich so ang­ esteuert, daß jeweils der erste Ausgang analog, das heißt mit zunehmendem Querschnitt, mit dem zweiten Ausgang ver­ bunden wird, so daß sich der Bremsdruck allmählich in die Niederdruckseite entlädt.In the case of comfort braking, the second isolating valve 20 is closed to increase the pressure and the hydraulic pump 16 is operated in pulsed fashion, so that the brake pressure in the wheel brakes 11 , 14 is built up analogously, that is to say gradually in small steps, via the three-way valves 21 , 22 . To reduce pressure, the hydraulic pump 16 is deactivated, and the three-way valves are gradually controlled so ang that the first output analog, that is, with increasing cross section, is connected to the second output ver, so that the brake pressure gradually discharges into the low pressure side .

Auch bei dieser zweiten Ausführungsform kann der Druckauf­ bau und der Druckabbau permanent und alternierend ablaufen, so daß eine kontinuierliche Druckregelung in kleinen Schritten möglich ist.In this second embodiment, too, the pressure can be increased construction and the pressure reduction are permanent and alternating, so that continuous pressure control in small Steps is possible.

Darüberhinaus ist es mit beiden Ausführungsformen auch möglich, die Druckmodulation dazu zu verwenden, eine von einem Fahrer ausgelöste Regelbremsung zu unterstützen, und zwar insbesondere oberhalb eines Ansteuerpunktes eines Boosters.Furthermore, it is the same with both embodiments possible to use pressure modulation to use one of to assist a driver's braking action, and in particular above a control point of a Boosters.

Schließlich soll noch darauf hingewiesen werden, daß die Funktion der Analogventile, die darin besteht, einen kon­ tinuierlichen und analogen Druckabbau zu realisieren, auch mit einer Hydraulikpumpe erfüllt werden könnte, die mit entgegengesetzter Drehung betreibbar ist, um auf diese Weise die Bremsflüssigkeit zurückzufördern. In diesem Fall müßte eine winkelabhängige Steuerung (Steuerspiegel) der Hydraulikpumpe erfolgen. Finally, it should be pointed out that the Function of the analog valves, which consists of a con to realize continuous and analog pressure reduction, too could be met with a hydraulic pump that with opposite rotation is operable to on this Way to return the brake fluid. In this case would have an angle-dependent control (control mirror) Hydraulic pump done.  

BezugszeichenlisteReference list

11

Hauptzylinder
Master cylinder

22nd

Hydraulik-Vorratsbehälter
Hydraulic reservoir

33rd

Bremskraftverstärker
Brake booster

44th

Bremspedal
Brake pedal

55

Bremsleitung
Brake line

66

analoges Ventil
analog valve

77

erster Bremszweig
first brake branch

88th

zweiter Bremszweig
second brake branch

99

erstes Einlaßventil
first inlet valve

1010th

erstes Auslaßventil
first exhaust valve

1111

erste Radbremse
first wheel brake

1212th

zweites Einlaßventil
second inlet valve

1313

zweites Auslaßventil
second exhaust valve

1414

zweite Radbremse
second wheel brake

1515

Niederdruckspeicher
Low pressure accumulator

1515

a erstes Rückschlagventil
a first check valve

1616

Hydraulikpumpe
hydraulic pump

1616

a zweites Rückschlagventil
a second check valve

1616

b drittes Rückschlagventil
b third check valve

1717th

Dämpfungskammer
Damping chamber

1717th

a Blende
a aperture

1818th

erstes Trennventil
first isolating valve

2020th

zweites Trennventil
second isolation valve

2121

erstes Dreiwegeventil
first three-way valve

2222

zweites Dreiwegeventil
second three-way valve

100100

Bremskreis
Brake circuit

Claims (13)

1. Hydraulische Bremsanlage für Regel- und Komfortbremsun­ gen, mit einer Hydraulikpumpe zum Aufbau eines eine Brem­ sung bewirkenden Hydraulikdrucks sowie einer Ventileinrich­ tung, über die der Hydraulikdruck abbaubar ist, dadurch gekennzeichnet, daß die Ventileinrichtung ein analoges Ventil (6) ist und daß das analoge Ventil und die Hydraulikpumpe (16) durch eine Steuereinrichtung in der Weise ansteuerbar sind, daß der Bremsdruck für eine Kom­ fortbremsung im wesentlichen stufenlos erhöht oder ver­ mindert werden kann.1. Hydraulic brake system for control and comfort braking, with a hydraulic pump to build up a brake effect hydraulic pressure and a Ventileinrich device via which the hydraulic pressure can be reduced, characterized in that the valve device is an analog valve ( 6 ) and that Analog valve and the hydraulic pump ( 16 ) can be controlled by a control device in such a way that the brake pressure for a Kom continuous braking can be increased or decreased essentially continuously. 2. Hydraulische Bremsanlage nach Anspruch 1, dadurch gekennzeichnet, daß das analoge Ventil (6) zwischen eine Druckseite der Hydraulikpumpe (16) und eine Nieder­ druckseite der Bremsanlage geschaltet ist, wobei das analoge Ventil (6) zum Abbau des Bremsdruckes durch die Steuereinrichtung stufenweise geöffnet werden kann.2. Hydraulic brake system according to claim 1, characterized in that the analog valve ( 6 ) between a pressure side of the hydraulic pump ( 16 ) and a low pressure side of the brake system is connected, the analog valve ( 6 ) for reducing the brake pressure by the control device in stages can be opened. 3. Hydraulische Bremsanlage nach Anspruch 2, dadurch gekennzeichnet, daß eine Saugseite der Hydraulik­ pumpe (16) über ein erstes Trennventil (18) mit einem Hy­ draulik-Vorratsbehälter (2) verbindbar ist, wobei zur Bremsdruckerhöhung durch die Steuereinrichtung das analoge Ventil (6) geschlossen und das erste Trennventil (18) geöffnet werden kann.3. Hydraulic brake system according to claim 2, characterized in that a suction side of the hydraulic pump ( 16 ) via a first isolating valve ( 18 ) with a hy draulic reservoir ( 2 ) can be connected, the analog valve ( 6 ) closed and the first isolating valve ( 18 ) can be opened. 4. Hydraulische Bremsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das analoge Ventil (6) stromlos offen und das erste Trennventil (18) stromlos geschlossen ist. 4. Hydraulic brake system according to one of the preceding claims, characterized in that the analog valve ( 6 ) is open when de-energized and the first isolating valve ( 18 ) is closed when de-energized. 5. Hydraulische Bremsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das analoge Ventil (6) ein Sitzventil ist, dessen Magnetantrieb proportionalisiert ist.5. Hydraulic brake system according to one of the preceding claims, characterized in that the analog valve ( 6 ) is a seat valve, the magnetic drive is proportional. 6. Hydraulische Bremsanlage für Regel- und Komfortbremsun­ gen, mit einer Hydraulikpumpe zum Aufbau eines eine Brem­ sung bewirkenden Hydraulikdrucks sowie einer Ventileinrich­ tung, über die der Hydraulikdruck abbaubar ist, dadurch gekennzeichnet, daß die Ventileinrichtung durch ein für jede Radbremse (11; 14) vorgesehenes analoge Drei­ wegeventil (21; 22) gebildet ist, deren Eingänge mit der Druckseite der Hydraulikpumpe (16) verbunden sind, deren erster Ausgang jeweils an eine Radbremse (11; 14) geführt ist, und deren zweite Ausgänge mit einer Niederdruckseite der Bremsanlage verbunden sind, wobei die Dreiwegeventile (21, 22) und die Hydraulikpumpe (16) durch eine Steuerein­ richtung in der Weise ansteuerbar sind, daß der Bremsdruck für eine Komfortbremsung im wesentlichen stufenlos erhöht oder vermindert werden kann.6. Hydraulic brake system for control and comfort braking, with a hydraulic pump to build up a brake effect hydraulic pressure and a Ventileinrich device via which the hydraulic pressure can be reduced, characterized in that the valve device by one for each wheel brake ( 11 ; 14 ) provided analog three-way valve ( 21 ; 22 ) is formed, the inputs of which are connected to the pressure side of the hydraulic pump ( 16 ), the first output of which is each guided to a wheel brake ( 11 ; 14 ), and the second outputs of which are connected to a low-pressure side of the brake system are, the three-way valves ( 21 , 22 ) and the hydraulic pump ( 16 ) can be controlled by a Steuerein direction in such a way that the brake pressure for comfort braking can be increased or decreased substantially continuously. 7. Hydraulische Bremsanlage nach Anspruch 6, dadurch gekennzeichnet, daß die Ansaugseite der Hydraulik­ pumpe (16) direkt mit einem Hydraulik-Vorratsbehälter (2) verbunden ist.7. Hydraulic brake system according to claim 6, characterized in that the suction side of the hydraulic pump ( 16 ) is connected directly to a hydraulic reservoir ( 2 ). 8. Hydraulische Bremsanlage nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß zum Abbau des Bremsdruckes an einem der analogen Dreiwegeventile (21; 22) durch die Steuereinrichtung stufenweise der erste Ausgang mit dem zweiten Ausgang verbindbar ist. 8. Hydraulic brake system according to claim 6 or 7, characterized in that for reducing the brake pressure on one of the analog three-way valves ( 21 ; 22 ) by the control device stepwise the first output can be connected to the second output. 9. Hydraulische Bremsanlage nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß mit der Niederdruckseite ein Niederdruckspeicher (15) verbunden ist und daß die Steuere­ inrichtung zur Erhöhung oder Verminderung des Bremsdruckes an mindestens einem der analogen Dreiwegeventile (21; 22) durch eine Antriebs- und/oder Bremsschlupfregelung an­ steuerbar ist.9. Hydraulic brake system according to one of claims 6 to 8, characterized in that a low-pressure accumulator ( 15 ) is connected to the low-pressure side and that the control device for increasing or reducing the brake pressure on at least one of the analog three-way valves ( 21 ; 22 ) by one Drive and / or brake slip control is controllable. 10. Hydraulische Bremsanlage nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß das mindestens eine analoge Dreiwegeventil (21, 22) ein Schieberventil mit integriertem Sitz ist.10. Hydraulic brake system according to one of claims 6 to 9, characterized in that the at least one analog three-way valve ( 21 , 22 ) is a slide valve with an integrated seat. 11. Hydraulische Bremsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Hydraulikpumpe (16) durch die Steuereinheit gepulst betreibbar ist.11. Hydraulic brake system according to one of the preceding claims, characterized in that the hydraulic pump ( 16 ) can be operated in a pulsed manner by the control unit. 12. Hydraulische Bremsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Ventileinrichtung (6; 21, 22) und die Hydraulikpumpe (16) mit der Steuereinrichtung zur Realisierung einer kontinuierlichen Druckregelung per­ manent betreibbar ist.12. Hydraulic brake system according to one of the preceding claims, characterized in that the valve device ( 6 ; 21 , 22 ) and the hydraulic pump ( 16 ) with the control device for realizing a continuous pressure control can be operated per manent. 13. Hydraulische Bremsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Steuereinrichtung zur Un­ terstützung einer manuellen Betätigung der Bremsanlage ak­ tivierbar ist.13. Hydraulic brake system according to one of the preceding Expectations, characterized in that the control device to Un support a manual actuation of the brake system ak can be activated.
DE19850386A 1998-05-12 1998-11-02 Hydraulic brake system for regulated and gentle braking Withdrawn DE19850386A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE19850386A DE19850386A1 (en) 1998-05-12 1998-11-02 Hydraulic brake system for regulated and gentle braking
DE59904457T DE59904457D1 (en) 1998-05-12 1999-05-11 HYDRAULIC BRAKE SYSTEM FOR CONTROL AND COMFORT BRAKES
PCT/EP1999/003221 WO1999058380A1 (en) 1998-05-12 1999-05-11 Hydraulic brake system for regulated and comfortable braking
US09/674,438 US6648423B1 (en) 1998-05-12 1999-05-11 Hydraulic brake system for regulated and comfortable braking
EP99924933A EP1077847B1 (en) 1998-05-12 1999-05-11 Hydraulic brake system for regulated and comfortable braking
JP2000548201A JP4819219B2 (en) 1998-05-12 1999-05-11 Hydraulic brake system for controlled and controllable brake operation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19821180 1998-05-12
DE19850386A DE19850386A1 (en) 1998-05-12 1998-11-02 Hydraulic brake system for regulated and gentle braking

Publications (1)

Publication Number Publication Date
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DE59904457T Expired - Lifetime DE59904457D1 (en) 1998-05-12 1999-05-11 HYDRAULIC BRAKE SYSTEM FOR CONTROL AND COMFORT BRAKES

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DE19918112A1 (en) * 1998-08-25 2000-03-02 Continental Teves Ag & Co Ohg Hydraulic car braking installation with wheel slip control has maximum vacuum brake force amplification limited to mean value of wheel brake pressure representative of wheel slip-free normal braking
DE10053993A1 (en) * 1999-11-27 2001-06-28 Continental Teves Ag & Co Ohg Hydraulic brake system for motor vehicles has suction-controlled pump for each front axle wheel brake, and suction-controlled pump for each rear axle wheel brake or common pump for both rear axle wheel brakes
DE10104497A1 (en) * 2000-02-02 2002-08-08 Continental Teves Ag & Co Ohg Method for controlling pressure in wheel brakes of electronically regulated braking system, involves using valve current magnitude at time of valve changeover to compute required valve current
DE10221456A1 (en) * 2001-07-11 2003-02-06 Continental Teves Ag & Co Ohg Calibrating current/opening characteristic of analogue hydraulic valve for regulated motor vehicle brake system, involves diagnostic or calibration process in which test rod is applied to brake pressure transducer and valve changeover
DE102006058085A1 (en) * 2006-06-06 2007-12-13 Continental Teves Ag & Co. Ohg Method for controlling analogously controlled hydraulic inlet valves
DE10147586B4 (en) * 2001-09-27 2010-12-02 Volkswagen Ag Electric brake system for a passenger vehicle
DE102004060080B4 (en) * 2004-07-08 2015-02-05 Continental Teves Ag & Co. Ohg Motor vehicle brake system

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DE4340467A1 (en) * 1993-11-27 1995-06-01 Bosch Gmbh Robert Hydraulic vehicle brake system working with external power
DE19537927A1 (en) * 1995-10-12 1997-04-17 Teves Gmbh Alfred Method for operating a hydraulic brake system
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19918112A1 (en) * 1998-08-25 2000-03-02 Continental Teves Ag & Co Ohg Hydraulic car braking installation with wheel slip control has maximum vacuum brake force amplification limited to mean value of wheel brake pressure representative of wheel slip-free normal braking
DE19918112B4 (en) * 1998-08-25 2007-05-10 Continental Teves Ag & Co. Ohg Hydraulic motor vehicle brake system with wheel slip control
DE10053993A1 (en) * 1999-11-27 2001-06-28 Continental Teves Ag & Co Ohg Hydraulic brake system for motor vehicles has suction-controlled pump for each front axle wheel brake, and suction-controlled pump for each rear axle wheel brake or common pump for both rear axle wheel brakes
DE10053993B4 (en) * 1999-11-27 2014-09-04 Continental Teves Ag & Co. Ohg Hydraulic brake system and method for brake pressure generation and control for vehicle brake system
DE10104497A1 (en) * 2000-02-02 2002-08-08 Continental Teves Ag & Co Ohg Method for controlling pressure in wheel brakes of electronically regulated braking system, involves using valve current magnitude at time of valve changeover to compute required valve current
DE10104497B4 (en) * 2000-02-02 2011-11-24 Continental Teves Ag & Co. Ohg Method for controlling the pressure in the wheel brakes of an electronically controlled braking system
DE10221456A1 (en) * 2001-07-11 2003-02-06 Continental Teves Ag & Co Ohg Calibrating current/opening characteristic of analogue hydraulic valve for regulated motor vehicle brake system, involves diagnostic or calibration process in which test rod is applied to brake pressure transducer and valve changeover
DE10221456B4 (en) * 2001-07-11 2011-08-11 Continental Teves AG & Co. OHG, 60488 Method for calibrating the current / opening characteristic of an analog hydraulic valve
DE10147586B4 (en) * 2001-09-27 2010-12-02 Volkswagen Ag Electric brake system for a passenger vehicle
DE102004060080B4 (en) * 2004-07-08 2015-02-05 Continental Teves Ag & Co. Ohg Motor vehicle brake system
DE102006058085A1 (en) * 2006-06-06 2007-12-13 Continental Teves Ag & Co. Ohg Method for controlling analogously controlled hydraulic inlet valves

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DE59904457D1 (en) 2003-04-10
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