DE4332451A1 - Control device for a hydraulic brake system for a motor vehicle - Google Patents

Control device for a hydraulic brake system for a motor vehicle

Info

Publication number
DE4332451A1
DE4332451A1 DE19934332451 DE4332451A DE4332451A1 DE 4332451 A1 DE4332451 A1 DE 4332451A1 DE 19934332451 DE19934332451 DE 19934332451 DE 4332451 A DE4332451 A DE 4332451A DE 4332451 A1 DE4332451 A1 DE 4332451A1
Authority
DE
Germany
Prior art keywords
brake
control device
hydraulic
brake system
brake pedal
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Withdrawn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
DE19934332451
Other languages
German (de)
Inventor
Wilhelm Cordes
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE19934332451 priority Critical patent/DE4332451A1/en
Publication of DE4332451A1 publication Critical patent/DE4332451A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • 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
    • B60T8/445—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 replenishing the released brake fluid volume into the brake piping
    • 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

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

Abstract

In a control device for a hydraulic brake system for a motor vehicle, in which the outlet pressure fed to the wheel brake cylinders of the hydraulic brake system can be regulated by way of a control valve, connected to a hydraulic pressure source and actuated by an electronic control device, a brake pedal actuation switch is provided, which at the start of brake pedal actuation, delivers an output signal to the electronic control device, whereupon the said device, by way of the control valve, raises the outlet pressure fed to the wheel brake cylinders of the hydraulic brake system to a predetermined value more rapidly than is possible solely by actuation of the brake pedal, owing to the clearance between the brake shoes or linings and the associated brake drums or discs.

Description

Die Erfindung betrifft eine Steuervorrichtung für eine Hydraulikbremsanlage für ein Kraftfahrzeug, bei der der den Radbremszylindern der Hydraulikbremsanlage zugeführte Ausgangsdruck über ein mit einer Hydraulikdruckquelle verbundenes und durch eine elektronische Regeleinrichtung angesteuertes Steuerventil regelbar ist.The invention relates to a control device for a Hydraulic brake system for a motor vehicle, in which the fed to the wheel brake cylinders of the hydraulic brake system Outlet pressure via a with a hydraulic pressure source connected and by an electronic control device controlled control valve is adjustable.

Eine derartige Steuervorrichtung für eine Hydraulikbrems­ anlage für ein Kraftfahrzeug ist bereits aus der DE 36 35 393 A1 bekannt. Bei dieser bekannten Steuervorrichtung wird der den Radbremszylindern der Hydraulikbremsanlage zugeführte Ausgangsdruck derart geregelt, daß sich ein linearer Zusammenhang zwischen der auf das Bremspedal ausgeübten Betätigungskraft und der tatsächlichen Fahr­ zeugbremsverzögerung ergibt. Auf diese Weise können vari­ ierende Beladungszustände sowie Reibwertschwankungen zwi­ schen den Bremsbacken bzw. -belägen und den Bremstrommeln bzw. -scheiben, die sich aufgrund von Feuchtigkeit erge­ ben können, ausgeglichen werden.Such a control device for a hydraulic brake System for a motor vehicle is already from DE 36 35 393 A1 known. In this known control device becomes the wheel brake cylinders of the hydraulic brake system supplied outlet pressure regulated so that a linear relationship between that on the brake pedal exerted actuation force and the actual driving brake deceleration results. In this way, vari Ending loading conditions and fluctuations in the coefficient of friction between between the brake shoes or pads and the brake drums or disks that arise due to moisture can be compensated.

Die aus der DE 36 35 393 A1 bekannte Hydraulikbremsanlage hat jedoch ebenso wie alle übrigen bekannten Hydraulik­ bremsanlagen den Nachteil, daß bei Beginn der Bremsbetä­ tigung ein Teil des zur Verfügung stehenden Bremspedalwe­ ges nicht in eine wirksame Fahrzeugverzögerung umgesetzt werden kann, sondern zum Anlegen der Bremsbacken bzw. -beläge an die Bremstrommeln bzw. -scheiben benötigt wird. Damit ergibt sich ein unerwünschter zeitlicher Verzug zwischen dem Beginn der Bremspedalbetätigung und dem Be­ ginn der Fahrzeugverzögerung.The hydraulic brake system known from DE 36 35 393 A1 However, like all other known hydraulics  Brake systems have the disadvantage that at the beginning of the brake part of the available brake pedal not converted into an effective vehicle deceleration but can be used to put on the brake shoes or pads on the brake drums or discs is required. This results in an undesirable delay between the start of the brake pedal application and the loading start of vehicle deceleration.

Es ist daher Aufgabe der Erfindung, eine Steuervorrich­ tung eingangs genannter Art anzugeben, die sich durch ein sehr schnelles Ansprechverhalten auszeichnet.It is therefore an object of the invention to provide a control device tion of the type mentioned above, which is characterized by a very fast response.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß ein Bremspedalbetätigungsschalter vorgesehen ist, der bei Beginn der Bremspedalbetätigung ein Ausgangssignal an die elektronische Regeleinrichtung abgibt, worauf diese über das Steuerventil den den Radbremszylindern der Hydraulik­ bremsanlage zugeführten Ausgangsdruck schneller auf einen vorgegebenen Wert anhebt, als dies durch alleinige Betä­ tigung des Bremspedals aufgrund des Spiels zwischen den Bremsbacken bzw. -belägen und den dazugehörigen Brems­ trommeln bzw. -scheiben möglich ist.This object is achieved in that a brake pedal actuation switch is provided which at Start of brake pedal actuation an output signal to the electronic control device gives what this on the control valve to the wheel brake cylinders of the hydraulics brake system supplied outlet pressure faster to one increases the predetermined value, as this by sole actuation of the brake pedal due to the play between the Brake shoes or pads and the associated brake drums or discs is possible.

Der der vorliegenden Erfindung zugrundeliegende Kernge­ danke besteht dabei darin, daß der Beginn der Bremspedal­ betätigung sehr frühzeitig erkannt wird, und daß unmit­ telbar nach Erkennen des Beginns eines Bremsvorganges der den Radbremszylindern der Hydraulikbremsanlage zugeführte Ausgangsdruck durch eine im Fahrzeug vorgesehene Hydrau­ likdruckquelle deutlich schneller angehoben wird, als dies durch alleinige Betätigung des Bremspedals möglich ist. Auf diese Weise wird das Spiel zwischen den Brems­ backen bzw. -belägen und den dazugehörigen Bremstrommeln bzw. -scheiben sehr schnell ausgeglichen, was zu einem deutlich verbesserten Ansprechverhalten der Hydraulik­ bremsanlage führt.The core ge on which the present invention is based thank you is that the start of the brake pedal actuation is recognized very early, and that immediately telbar after detection of the start of a braking process fed to the wheel brake cylinders of the hydraulic brake system Output pressure through a hydraulic provided in the vehicle likdruckquelle is raised significantly faster than this is possible by operating the brake pedal alone is. This way the game between the brakes bake or coverings and the associated brake drums or discs compensated very quickly, resulting in a  significantly improved hydraulic response brake system leads.

Um den zusätzlichen konstruktiven Aufwand möglichst ge­ ring zu halten, kann als den Beginn einer Bremsbetätigung sensierender Bremspedalbetätigungsschalter der ohnehin vorhandene Bremslichtschalter verwendet werden.To ge the additional design effort as possible holding ring can be the beginning of a brake application sensing brake pedal actuation switch anyway existing brake light switches can be used.

Im folgenden wird die Erfindung anhand eines Ausführungs­ beispieles erläutert.The invention based on an embodiment example explained.

Die einzige Figur zeigt eine Hydraulikbremsanlage für ein Kraftfahrzeug mit der erfindungsgemäßen Steuervorrichtung in schematischer Darstellung.The only figure shows a hydraulic brake system for one Motor vehicle with the control device according to the invention in a schematic representation.

Wird das Bremspedal 1 betätigt, so wird über einen Haupt­ bremszylinder 2 und eine Hydraulikeinheit 3, beispiels­ weise eines Antiblockierregelsystems, der jeweilige Aus­ gangsdruck den Radbremszylindern der Radbremssättel 4, 5, 6 und 7 zugeführt, um die jeweiligen zugehörigen Brems­ scheiben 8, 9, 10 und 11 abzubremsen.If the brake pedal 1 is actuated, a master brake cylinder 2 and a hydraulic unit 3 , for example an anti-lock control system, supply the respective output pressure to the wheel brake cylinders of the wheel brake calipers 4 , 5 , 6 and 7 in order to disks 8 , 9 , 10 and 11 to brake.

Da bei Beginn eines Bremsvorganges zwischen den Bremsbe­ lägen und den Bremsscheiben 8, 9, 10 und 11 ein Spiel be­ steht, wirkt die Fahrzeugbetriebsbremse erst mit zeitli­ chem Verzug.Since there would be a game at the beginning of a braking process between the Bremsbe and the brake discs 8 , 9 , 10 and 11 , the vehicle service brake only acts with a time delay.

Um das Ansprechverhalten der Fahrzeugbetriebsbremse deut­ lich zu verbessern, ist bei der erfindungsgemäßen Fahrzeugbremsanlage eine elektronische Regeleinrichtung 12 vorgesehen, die als Eingangsignal das Ausgangssignal eines Bremspedalbetätigungsschalters 13 erhält.In order to improve the response behavior of the vehicle service brake significantly, an electronic control device 12 is provided in the vehicle brake system according to the invention, which receives the output signal of a brake pedal actuation switch 13 as an input signal.

Wird durch den Bremspedalbetätigungsschalter 13, der im einfachsten Fall der ohnehin vorhandene Bremslichtschal­ ter sein kann, der Beginn eines Bremsvorganges festge­ stellt, so gibt dieser ein Signal an die elektronische Regeleinrichtung 12 ab, worauf diese über ein Steuerven­ til 14 den den Radbremszylindern der Radbremssättel 4, 5, 6 und 7 zugeführten Ausgangsdruck schneller auf einen vorgegebenen Wert anhebt, als dies durch alleinige Betä­ tigung des Bremspedals 1 aufgrund des Spiels zwischen den Bremsbelägen und den dazugehörigen Bremsscheiben 8, 9, 10 und 11 möglich ist.If by the brake pedal actuation switch 13 , which in the simplest case can be the already existing brake light switch, the start of a braking operation determines Festge, this emits a signal to the electronic control device 12 , whereupon the latter via a control valve 14 to the wheel brake cylinders of the wheel brake calipers 4 , 5 , 6 and 7 supplied output pressure rises faster to a predetermined value than is possible by sole actuation of the brake pedal 1 due to the play between the brake pads and the associated brake discs 8 , 9 , 10 and 11 .

Damit über das Steuerventil 14 der den Radbremszylindern zugeführte Ausgangsdruck ohne korrespondierende Bremspe­ dalbewegung erhöht werden kann, ist das Steuerventil 14 mit einer Hydraulikdruckquelle verbunden, die sich aus einem Druckspeicher 15 und einer Hydraulikpumpe 16 zusam­ mensetzt, die beispielsweise durch einen in der Figur nicht dargestellten Elektromotor angetrieben werden kann. Die Hydraulikpumpe 16 ist über eine Ansaugleitung 17 mit einem Vorratsbehälter 18 für die Hydraulikflüssigkeit verbunden.So that the output pressure supplied to the wheel brake cylinders can be increased via the control valve 14 without corresponding brake pedal control, the control valve 14 is connected to a hydraulic pressure source, which is composed of a pressure accumulator 15 and a hydraulic pump 16 , for example, by an electric motor, not shown in the figure can be driven. The hydraulic pump 16 is connected via a suction line 17 to a reservoir 18 for the hydraulic fluid.

Kernstück der erfindungsgemäßen Hydraulikbremsanlage ist die elektronische Regeleinrichtung 12 in Kombination mit dem Bremspedalbetätigungsschalter 13. Wird durch den Bremspedalbetätigungsschalter 13 der Beginn der Bremspe­ dalbetätigung erkannt, so wird durch die elektronische Regeleinrichtung 12 über das Steuerventil 14 der den Rad­ bremszylindern der Hydraulikbremsanlage zugeführte Aus­ gangsdruck automatisch sehr schnell angehoben. Durch diese sehr schnelle Anhebung des Ausgangsdrucks wird er­ reicht, daß das zwischen den Bremsbelägen der Bremssättel 4, 5, 6 und 7 und der dazugehörigen Bremsscheiben 8, 9, 10 und 11 vorhandene Spiel schneller ausgeglichen wird, als dies durch die Bremspedalbetätigung alleine möglich gewesen wäre. Damit wird ein sehr schnelles Ansprechver­ halten der Hydraulikbremsanlage erreicht, was zu äußerst kurzen Bremswegen führt.The core of the hydraulic brake system according to the invention is the electronic control device 12 in combination with the brake pedal actuation switch 13 . If the brake pedal actuation switch 13 detects the start of the brake pedal actuation, then the electronic control device 12 via the control valve 14 automatically feeds the wheel brake cylinders of the hydraulic brake system from the initial pressure which is raised very quickly. This very rapid increase in the output pressure, it is sufficient that the existing game between the brake pads of the brake calipers 4 , 5 , 6 and 7 and the associated brake discs 8 , 9 , 10 and 11 is compensated faster than was possible by actuating the brake pedal alone would. A very quick response behavior of the hydraulic brake system is achieved, which leads to extremely short braking distances.

Claims (2)

1. Steuervorrichtung für eine Hydraulikbremsanlage für ein Kraftfahrzeug, bei der der den Radbremszylindern der Hydraulikbremsanlage zugeführte Ausgangsdruck über ein mit einer Hydraulikdruckquelle verbundenes und durch eine elektronische Regeleinrichtung ange­ steuertes Steuerventil regelbar ist, dadurch gekennzeichnet, daß ein Bremspedalbetäti­ gungsschalter (13) vorgesehen ist, der bei Beginn der Bremspedalbetätigung ein Ausgangssignal an die elektronische Regeleinrichtung (12) abgibt, worauf diese über das Steuerventil (14) den den Radbremszy­ lindern der Hydraulikbremsanlage zugeführten Aus­ gangsdruck schneller auf einen vorgegebenen Wert an­ hebt, als dies durch alleinige Betätigung des Bremspedals (1) aufgrund des Spiels zwischen den Bremsbacken bzw. -belägen und den dazugehörigen Bremstrommeln bzw. -scheiben möglich ist. 1. Control device for a hydraulic brake system for a motor vehicle in which the output pressure supplied to the wheel brake cylinders of the hydraulic brake system can be controlled via a control valve connected to a hydraulic pressure source and controlled by an electronic control device, characterized in that a brake pedal actuation switch ( 13 ) is provided which at the beginning of the brake pedal actuation, outputs an output signal to the electronic control device ( 12 ), whereupon the control valve ( 14 ) raises the output pressure supplied to the hydraulic brake system to relieve the wheel brake cylinder to a predetermined value faster than by simply actuating the brake pedal ( 1 ). is possible due to the play between the brake shoes or pads and the associated brake drums or discs. 2. Steuervorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Bremspedalbetäti­ gungsschalter der ohnehin vorhandene Bremslicht­ schalter (13) verwendet wird.2. Control device according to claim 1, characterized in that the already existing brake light switch ( 13 ) is used as the brake pedal actuation switch.
DE19934332451 1993-09-23 1993-09-23 Control device for a hydraulic brake system for a motor vehicle Withdrawn DE4332451A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19934332451 DE4332451A1 (en) 1993-09-23 1993-09-23 Control device for a hydraulic brake system for a motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934332451 DE4332451A1 (en) 1993-09-23 1993-09-23 Control device for a hydraulic brake system for a motor vehicle

Publications (1)

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DE4332451A1 true DE4332451A1 (en) 1995-03-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803425A1 (en) * 1996-04-26 1997-10-29 Denso Corporation Braking apparatus for automotive vehicles
CN103303287A (en) * 2012-03-13 2013-09-18 株式会社万都 Integrated electronic hydraulic brake system
DE102022131323A1 (en) 2022-11-28 2024-05-29 Bayerische Motoren Werke Aktiengesellschaft Brake cylinder for a brake of a motor vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2430448A1 (en) * 1974-06-25 1976-01-15 Teldix Gmbh Electro-mechanical control for car brakes - with brake pedal operation controlling braking via retardation sensor for reproducible effect
DE3511579A1 (en) * 1985-03-29 1986-10-02 Robert Bosch Gmbh, 7000 Stuttgart Method and device for controlling the brake pressure in vehicle brake systems
DE3607366A1 (en) * 1986-03-06 1987-09-10 Teves Gmbh Alfred HYDRAULIC BRAKE SYSTEM FOR MOTOR VEHICLES
DE4028290C1 (en) * 1990-09-06 1992-01-02 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4037468A1 (en) * 1990-11-24 1992-05-27 Daimler Benz Ag METHOD FOR ACTIVATING THE HYDRAULIC SERVICE BRAKE SYSTEM OF A ROAD VEHICLE
DE4208496C1 (en) * 1992-03-17 1993-08-05 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2430448A1 (en) * 1974-06-25 1976-01-15 Teldix Gmbh Electro-mechanical control for car brakes - with brake pedal operation controlling braking via retardation sensor for reproducible effect
DE3511579A1 (en) * 1985-03-29 1986-10-02 Robert Bosch Gmbh, 7000 Stuttgart Method and device for controlling the brake pressure in vehicle brake systems
DE3607366A1 (en) * 1986-03-06 1987-09-10 Teves Gmbh Alfred HYDRAULIC BRAKE SYSTEM FOR MOTOR VEHICLES
DE4028290C1 (en) * 1990-09-06 1992-01-02 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De
DE4037468A1 (en) * 1990-11-24 1992-05-27 Daimler Benz Ag METHOD FOR ACTIVATING THE HYDRAULIC SERVICE BRAKE SYSTEM OF A ROAD VEHICLE
DE4208496C1 (en) * 1992-03-17 1993-08-05 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803425A1 (en) * 1996-04-26 1997-10-29 Denso Corporation Braking apparatus for automotive vehicles
US5890776A (en) * 1996-04-26 1999-04-06 Denso Corporation Braking apparatus for automotive vehicles
CN103303287A (en) * 2012-03-13 2013-09-18 株式会社万都 Integrated electronic hydraulic brake system
CN103303287B (en) * 2012-03-13 2016-05-11 株式会社万都 Integrated electronic brake fluid system
DE102022131323A1 (en) 2022-11-28 2024-05-29 Bayerische Motoren Werke Aktiengesellschaft Brake cylinder for a brake of a motor vehicle

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