EP3157787A1 - Electronically slip-controllable vehicle brake system - Google Patents

Electronically slip-controllable vehicle brake system

Info

Publication number
EP3157787A1
EP3157787A1 EP15719730.2A EP15719730A EP3157787A1 EP 3157787 A1 EP3157787 A1 EP 3157787A1 EP 15719730 A EP15719730 A EP 15719730A EP 3157787 A1 EP3157787 A1 EP 3157787A1
Authority
EP
European Patent Office
Prior art keywords
pressure
brake
valve
pressure medium
electronically
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Withdrawn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
EP15719730.2A
Other languages
German (de)
French (fr)
Inventor
Christoph Kasper
Guenther Schnalzger
Juergen Reiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3157787A1 publication Critical patent/EP3157787A1/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Withdrawn legal-status Critical Current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
    • B60T8/48—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B60T13/147—In combination with distributor valve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • 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
    • B60T13/74—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 electrical assistance or drive
    • B60T13/741—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 electrical assistance or drive acting on an ultimate actuator
    • 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
    • B60T13/74—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 electrical assistance or drive
    • B60T13/745—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 electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
    • 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
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/025—Electrically controlled valves
    • B60T15/028—Electrically controlled valves in hydraulic 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
    • B60T8/48—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
    • 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

Definitions

  • the invention relates to an electronically slip-controllable vehicle brake system according to the features of the preamble of claim 1.
  • a slip-controllable vehicle brake system is known for example from DE 199 40 263 AI.
  • This known vehicle brake system comprises an anti-lock control, a traction control and a vehicle dynamics control. While at a
  • Blockage protection of the driver the brake pressure in a wheel brake through
  • Brake pressure generated in a traction control and in a vehicle dynamics control at least partially by external force is equipped for this purpose with a pressure generator, which is controlled by an electronically
  • Electric motor is driven.
  • Vehicle brake system consists of a switchable valve controllable first fluid connection.
  • the switching valve is open in its normal position directional control valve with two pressure medium connections, which can be switched from the passage position to a blocking position. In the locked position of
  • Change-over valve the hydraulic connection between the driver and wheel brake is interrupted, so that a change in the brake pressure by the driver is no longer possible.
  • a second fluid connection exists between the master cylinder and a suction side of the pressure generator.
  • This pressure medium connection is controllable by means of a so-called intake valve.
  • In this intake valve is a closed in its basic position directional control valve with two pressure medium connections, which can be switched from a blocking position into a passage position to supply a supply of pressure to the pressure generator from the
  • Intake valve and changeover valve are designed as two, structurally separate and each switchable by an associated electronically controllable actuator, 2/2-way valves. This construction is relatively complex, requires double installation effort for anchoring the two valves on one
  • Housing block of a hydraulic unit of the vehicle brake system takes
  • DE 199 40 263 AI contains the note that instead of two individual 2/2-way valves and a common 3/3-way valve can be used. However, this reference refers to the pressure build-up or
  • ESP brake system driving stability control
  • An electronically slip-controllable vehicle brake system has the advantage that by using component synergies, a reduction in the number of necessary assemblies takes place and ultimately parts and assembly costs and space can be saved.
  • a brake circuit 10 is equipped with anti-lock, traction slip and driving stability control (ABS / ESP brake system)
  • This brake circuit 10 is connected to a
  • the brake pressure in the wheel brakes 14 is adjusted in each case by means of a pressure modulation valve 16 and adapted to the slip conditions which prevail at the wheel associated with the respective wheel brake 14.
  • the respective pressure modulation valve 16 is formed as a directional control valve with three pressure medium connections 18, 20, 22, by an electronically controllable actuator 24 against the force of a
  • Pressure modulation valve 16 is locked in this basic position 28 to the
  • Outflowing brake fluid enters a return 34, which with the
  • Return port 32 of the pressure modulation valve 16 of the other wheel brake 14 of the brake circuit 10 is connected.
  • an accumulator 36 which initially buffers the outflowing brake fluid.
  • a pressure generator 38 is further connected to its pump suction 40.
  • Pressure generator 38 is actuated by an electronically controllable drive motor 42 to brake fluid while increasing the brake pressure to that in the pressure reduction position 32 of the pressure modulation valve 16 closed
  • Return ports 22 are also the master cylinder ports 18 of
  • Pressure modulation valves 16 of a brake circuit 10 via a supply line 44 coupled together.
  • Each pressure modulation valve 16 is of a bypass 46 with one therein
  • this check valve 48 opens in the direction of the wheel brake 14 to the master cylinder 12 and in
  • Bypass 46 and check valve 48 are provided to a faster and possible not throttled reduction of brake pressure at the
  • Wheel brake 14 to allow, as soon as the driver, the actuation force on
  • Pressure modulation valve 16 is.
  • the brake circuit 10 is further equipped with an operating mode switching valve 50 which is disposed between the master cylinder 12 and a pump pressure port 52 of the pressure generator 40.
  • This operating mode changeover valve 50 is designed according to the invention in the form of a directional control valve with three pressure medium connections 54, 56, 58, which can be switched by an electronically controllable actuator 60 against the force of a restoring element 62 into three discrete positions 64, 66, 68.
  • the three pressure medium connections are one
  • Pressure modulation valve 16 flows.
  • Lock position 66 is called.
  • the master brake cylinder port 54 is connected to the pump suction port 58 while the pump pressure port 56 is shut off. Accordingly, brake fluid flows in this intake position 68 from the master brake cylinder 12 to the pump suction port 40, so that the pressure generator 38 is supplied with brake fluid both from the master brake cylinder 12 and from the return line 34.
  • An optionally provided bypass 70 to the operating mode changeover valve 50 connects the master brake cylinder port 54 with the pump pressure port 56.
  • This bypass 70 is controlled by a check valve 72, which is the
  • the check valve 72 is exemplary designed featherless, whereby the valve closing member is pressed only by the effective hydraulic pressure against a valve seat to close this.
  • this bypass 70 can be provided if the
  • the brake circuit 10 thus has exclusively by electronically controllable actuators 24; 60 controlled 3/3-way switching valves for controlling the pressure medium flow or for adapting the brake pressure to the
  • the Radiomannumschaltventil 50 and the pressure modulation valves 16 are structurally different, since they are in particular in their respective third position 32; 68 different from each other in which they connect or lock different hydraulic connections. In addition, they have due to the adjusting pressure ratios differently sized valve seats and closing body and require in view of the different powerful actuators to their respective operation. Also in the associated bypass 46; 70, the mode switching valve 50 is different from
  • Pressure modulation valve 16 which is based on the blocking in different directions check valves 48; 72 becomes apparent.
  • Mode switch valve 50 to summarize a unit or alternatively the bypass 70 and the check valve 72 detached from the operating mode changeover valve 50 represent.
  • the function of the described brake circuit 10 is known in principle and should therefore be briefly touched upon below for the sake of clarity:
  • the brake pressure is generated by the driver by muscular power of the master cylinder 12.
  • the Bremsartumschaltventil 50 assumes its basic position 64, as well as the various wheel brakes 14 of the brake circuit 10 associated pressure modulation valves 16. Consequently, there is a continuous pressure medium connection from the master cylinder 12 to the wheel brakes 14, via which a brake pressure build-up takes place. If the necessary brake pressure is reached, the pressure modulation valves 16 are switched to their blocking position 30 (middle position) and the brake pressure is maintained. Any necessary reduction of the brake pressure takes place by switching the
  • Pressure modulation valves 16 in its third position 32, in which the wheel brakes 14 are connected to the return 34 and the inlet 18 is interrupted instead.
  • Brake fluid flows from the wheel brakes 14 in the return 34 and on to the pump suction port 40.
  • the driven by external force pressure generator 38 promotes the upcoming brake fluid through the Radio cylinder 12 back.
  • the bypass 70 of the operating mode changeover valve 50 is not flowed through because the check valve 72 is pressed against its seat by the higher pressure at the pump pressure connection 56 of the operating mode changeover valve 50 and thus shuts off this flow direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Braking Systems And Boosters (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The invention relates to an electronically slip-controllable vehicle brake system with a human-powered master brake cylinder (12) and with a pressure generator (38) which can be driven by an external force for supplying a brake fluid under a brake pressure to a wheel brake (14) connected to the master brake cylinder (12) and to the pressure generator (38). Such vehicle brake systems are equipped with, among others, an electronically actuatable valve device (50) which controls the pressure medium connections of the master brake cylinder (12) to the wheel brake (14) and to a suction side of the pressure generator (38). Known valve devices for this purpose comprise two distribution valves with two respective pressure medium connections, each of which can be switched by an actuator into two positions, namely a blocking position and a flow position. In order to reduce costs, installation space, and the number of components, an individual valve device (50) is to be used as the valve device, comprising three pressure medium connections (54, 56, 58) that can be switched by an electronically actuatable actuator (60) into three discrete positions (64, 66, 68) in which the pressure medium connections (54, 56, 58) are connected to one another in different variations or are blocked from one another.

Description

Beschreibung Titel  Description title
Elektronisch schlupfregelbare Fahrzeugbremsanlage Electronically slip-controllable vehicle brake system
Stand der Technik State of the art
Die Erfindung betrifft eine elektronisch schlupfregelbare Fahrzeugbremsanlage nach den Merkmalen des Gattungsbegriffs des Anspruchs 1. Eine derartige schlupfregelbare Fahrzeugbremsanlage ist beispielsweise bekannt aus der DE 199 40 263 AI. The invention relates to an electronically slip-controllable vehicle brake system according to the features of the preamble of claim 1. Such a slip-controllable vehicle brake system is known for example from DE 199 40 263 AI.
Diese bekannte Fahrzeugbremsanlage umfasst eine Blockierschutzregelung, eine Antriebsschlupfregelung und eine Fahrdynamikregelung. Während bei einer This known vehicle brake system comprises an anti-lock control, a traction control and a vehicle dynamics control. While at a
Blockierschutzregelung der Fahrer den Bremsdruck in einer Radbremse durch Blockage protection of the driver the brake pressure in a wheel brake through
Betätigung eines Hauptbremszylinders per Muskelkraft erzeugt, wird dieser Actuation of a master cylinder generated by muscle power, this is
Bremsdruck bei einer Antriebsschlupfregelung und bei einer Fahrdynamikregelung zumindest teilweise durch Fremdkraft erzeugt. Die Fahrzeugbremsanlage ist hierfür mit einem Druckerzeuger ausgestattet, der von einem elektronisch ansteuerbaren Brake pressure generated in a traction control and in a vehicle dynamics control at least partially by external force. The vehicle brake system is equipped for this purpose with a pressure generator, which is controlled by an electronically
Elektromotor angetrieben wird. Electric motor is driven.
Zwischen dem Hauptbremszylinder und der Radbremse der bekannten Between the master cylinder and the wheel of the known
Fahrzeugbremsanlage besteht eine von einem Umschaltventil steuerbare erste Druckmittelverbindung. Das Umschaltventil ist ein in seiner Grundstellung offenes Wegeventil mit zwei Druckmittelanschlüssen, welches von der Durchlassstellung in eine Sperrstellung umgeschaltet werden kann. In der Sperrstellung des Vehicle brake system consists of a switchable valve controllable first fluid connection. The switching valve is open in its normal position directional control valve with two pressure medium connections, which can be switched from the passage position to a blocking position. In the locked position of
Umschaltventils ist die hydraulische Verbindung zwischen Fahrer und Radbremse unterbrochen, so dass eine Änderung des Bremsdrucks durch den Fahrer nicht mehr möglich ist. Eine zweite Druckmittelverbindung besteht zwischen dem Hauptbremszylinder und einer Saugseite des Druckerzeugers. Diese Druckmittelverbindung ist mittels eines sogenannten Ansaugventils steuerbar. Bei diesem Ansaugventil handelt es sich um ein in seiner Grundstellung geschlossenes Wegeventil mit zwei Druckmittelanschlüssen, das aus einer Sperrstellung in eine Durchlassstellung umgeschaltet werden kann, um bei Bedarf eine Versorgung des Druckerzeugers mit Druckmittel aus dem Change-over valve, the hydraulic connection between the driver and wheel brake is interrupted, so that a change in the brake pressure by the driver is no longer possible. A second fluid connection exists between the master cylinder and a suction side of the pressure generator. This pressure medium connection is controllable by means of a so-called intake valve. In this intake valve is a closed in its basic position directional control valve with two pressure medium connections, which can be switched from a blocking position into a passage position to supply a supply of pressure to the pressure generator from the
Hauptbremszylinder zu ermöglichen. To allow master cylinder.
Ansaugventil und Umschaltventil sind ausgebildet als zwei, baulich voneinander getrennte und von jeweils einem zugeordneten elektronisch ansteuerbaren Aktuator umschaltbare, 2/2-Wegeventile. Diese Bauweise ist relativ aufwändig, erfordert doppelten Montageaufwand zur Verankerung der beiden Ventile an einem Intake valve and changeover valve are designed as two, structurally separate and each switchable by an associated electronically controllable actuator, 2/2-way valves. This construction is relatively complex, requires double installation effort for anchoring the two valves on one
Gehäuseblock eines Hydroaggregats der Fahrzeugbremsanlage, nimmt Housing block of a hydraulic unit of the vehicle brake system, takes
verhältnismäßig viel Bauraum dieses Gehäuseblocks in Anspruch und ist darüber hinaus teuer. relatively much space of this housing block to complete and is also expensive.
Die Beschreibung zur DE 199 40 263 AI enthält den Hinweis, dass anstelle zweier einzelner 2/2-Wegeventile auch ein gemeinsames 3/3-Wegeventil verwendet werden kann. Allerdings bezieht sich dieser Hinweis auf die Druckaufbau- bzw. The description of DE 199 40 263 AI contains the note that instead of two individual 2/2-way valves and a common 3/3-way valve can be used. However, this reference refers to the pressure build-up or
Druckabsenkventile, also die Einrichtung zur Modulation des Bremsdrucks in derDruckabsenkventile, so the means for modulating the brake pressure in the
Radbremse und nicht auf eine Kombination eines Umschalt- mit einem Ansaugventil bei einer Fahrzeugbremsanlage mit Fahrstabilitätsregelung (ESP-Bremsanlage). Wheel brake and not on a combination of a changeover with an intake valve in a vehicle brake system with driving stability control (ESP brake system).
Vorteile der Erfindung Advantages of the invention
Eine elektronisch schlupfregelbare Fahrzeugbremsanlage nach den Merkmalen des Anspruchs 1 weist den Vorteil auf, dass durch Ausnutzung von Bauteilsynergien eine Reduzierung der Anzahl notwendiger Baugruppen erfolgt und letztlich Teile- und Montagekosten sowie Bauraum eingespart werden können. An electronically slip-controllable vehicle brake system according to the features of claim 1 has the advantage that by using component synergies, a reduction in the number of necessary assemblies takes place and ultimately parts and assembly costs and space can be saved.
Weitere Vorteile oder vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Zeichnung Further advantages or advantageous developments of the invention will become apparent from the dependent claims and the description below. drawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in nachfolgender Beschreibung detailliert erläutert. Die einzige Figur zeigt einen An embodiment of the invention is illustrated in the drawing and explained in detail in the following description. The only figure shows one
Bremskreis einer erfindungsgemäß aufgebauten elektronisch schlupfregelbaren Fahrzeugbremsanlage mit Fahrstabilitätsregelung anhand eines Hydraulikschaltplans mit den Schaltsymbolen der wesentlichen Komponenten. Brake circuit of an inventively constructed electronic slip-controllable vehicle brake system with driving stability control using a hydraulic circuit diagram with the symbols of the essential components.
Beschreibung des Ausführungsbeispiels Description of the embodiment
In der Figur ist ein Bremskreis 10 einer mit Blockierschutz-, Antriebsschlupf- und Fahrstabilitätsregelung (ABS/ESP-Bremsanlage) ausgestatteten In the figure, a brake circuit 10 is equipped with anti-lock, traction slip and driving stability control (ABS / ESP brake system)
Fahrzeugbremsanlage dargestellt. Dieser Bremskreis 10 ist an einen Vehicle brake system shown. This brake circuit 10 is connected to a
Hauptbremszylinder 12 angeschlossen, welcher von einem Fahrer durch Muskelkraft betätigbar ist, beispielsweise über ein Bremspedal, um zwei Radbremsen 14 des Bremskreises 10 mit Bremsfluid unter Bremsdruck zu versorgen. Der Bremsdruck in den Radbremsen 14 wird jeweils mit Hilfe eines Druckmodulationsventils 16 eingestellt und an die Schlupfverhältnisse, welche an dem der jeweiligen Radbremse 14 zugeordneten Rad vorherrschen, angepasst. Das jeweilige Druckmodulationsventil 16 ist als Wegeventil mit drei Druckmittelanschlüssen 18, 20, 22 ausgebildet, das von einem elektronisch ansteuerbaren Aktuator 24 entgegen der Kraft eines Connected to the master cylinder 12, which is actuated by a driver by muscle power, for example via a brake pedal to provide two wheel brakes 14 of the brake circuit 10 with brake fluid under braking pressure. The brake pressure in the wheel brakes 14 is adjusted in each case by means of a pressure modulation valve 16 and adapted to the slip conditions which prevail at the wheel associated with the respective wheel brake 14. The respective pressure modulation valve 16 is formed as a directional control valve with three pressure medium connections 18, 20, 22, by an electronically controllable actuator 24 against the force of a
Rückstellelements 26 in drei diskrete Stellungen 28, 30, 32 schaltbar ist. Return element 26 in three discrete positions 28, 30, 32 is switchable.
In der dargestellten Grundstellung 28 ist das Druckmodulationsventil 16 offen In the illustrated basic position 28, the pressure modulation valve 16 is open
(Durchlassstellung), das heißt ein Hauptbremszylinder- bzw. Zulaufanschluss 18 und ein Radanschluss 20 des Druckmodulationsventils 16 sind miteinander verbunden, so dass Bremsfluid in die zugeordnete Radbremse 14 einströmen kann. Die bestehende hydraulische Verbindung ist zur situationsabhängigen Anpassung des Bremsdrucks in beide Flussrichtungen durchströmbar. Ein Rücklaufanschluss 22 des (Through position), that is a Hauptbremszylinder- or inlet port 18 and a wheel port 20 of the pressure modulation valve 16 are connected to each other, so that brake fluid can flow into the associated wheel brake 14. The existing hydraulic connection can be flowed through for situation-dependent adaptation of the brake pressure in both directions of flow. A return port 22 of the
Druckmodulationsventils 16 ist in dieser Grundstellung 28 gesperrt, um den Pressure modulation valve 16 is locked in this basic position 28 to the
Druckaufbau in der Radbremse 14 überhaupt erst zu ermöglichen. ln einer mittleren Stellung des Druckmodulationsventils sind alle drei Anschlüsse 18, 20, 22 gegeneinander gesperrt. Diese Sperrstellung 30 dient dazu, den einmal aufgebauten Bremsdruck aufrecht erhalten. Pressure build-up in the wheel brake 14 in the first place to allow. In a middle position of the pressure modulation valve, all three ports 18, 20, 22 are locked against each other. This blocking position 30 serves to maintain the once built up brake pressure.
In einer dritten Stellung des Druckmittelmodulationsventils 16 sind der Radanschluss 20 und ein Rücklaufanschluss 22 miteinander verbunden, sowie der In a third position of the pressure medium modulation valve 16, the wheel port 20 and a return port 22 are connected to each other, as well as the
Hauptbremszylinderanschluss 18 abgesperrt. In dieser Druckabbaustellung 32 fließt Bremsfluid aus der Radbremse 14 ab, wodurch eine Absenkung des Bremsdrucks eintritt. Master cylinder connection 18 shut off. In this pressure reduction position 32, brake fluid flows out of the wheel brake 14, whereby a lowering of the brake pressure occurs.
Abströmendes Bremsfluid gelangt in einen Rücklauf 34, welcher mit dem Outflowing brake fluid enters a return 34, which with the
Rücklaufanschluss 32 des Druckmodulationsventils 16 der anderen Radbremse 14 des Bremskreises 10 verbunden ist. Im Rücklauf 34 befindet sich ein Druckspeicher 36, der das abströmende Bremsfluid zunächst puffert. An den Rücklauf 34 ist ferner ein Druckerzeuger 38 mit seinem Pumpensauganschluss 40 angeschlossen. Der Return port 32 of the pressure modulation valve 16 of the other wheel brake 14 of the brake circuit 10 is connected. In the return 34 is an accumulator 36, which initially buffers the outflowing brake fluid. At the return 34, a pressure generator 38 is further connected to its pump suction 40. Of the
Druckerzeuger 38 ist von einem elektronisch ansteuerbaren Antriebsmotor 42 betätigbar, um Bremsfluid unter gleichzeitiger Erhöhung des Bremsdrucks zu dem in der Druckabbaustellung 32 des Druckmodulationsventils 16 geschlossenen Pressure generator 38 is actuated by an electronically controllable drive motor 42 to brake fluid while increasing the brake pressure to that in the pressure reduction position 32 of the pressure modulation valve 16 closed
Hauptbremszylinderanschluss 18 zurück zu fördern. Vergleichbar zu den Master cylinder connection 18 back to promote. Comparable to the
Rücklaufanschlüssen 22 sind auch die Hauptbremszylinderanschlüsse 18 der Return ports 22 are also the master cylinder ports 18 of
Druckmodulationsventile 16 eines Bremskreises 10 über eine Zulaufleitung 44 miteinander gekoppelt. Pressure modulation valves 16 of a brake circuit 10 via a supply line 44 coupled together.
Jedes Druckmodulationsventil 16 ist von einem Bypass 46 mit einem darin Each pressure modulation valve 16 is of a bypass 46 with one therein
angeordneten Rückschlagventil 48 umströmbar, wobei dieses Rückschlagventil 48 in Richtung von der Radbremse 14 zum Hauptbremszylinder 12 öffnet und in arranged check valve 48 flow around, this check valve 48 opens in the direction of the wheel brake 14 to the master cylinder 12 and in
Gegenrichtung sperrt. Bypass 46 bzw. Rückschlagventil 48 sind vorgesehen um einen schnelleren und möglichst nicht gedrosselten Abbau von Bremsdruck an der Opposite direction locks. Bypass 46 and check valve 48 are provided to a faster and possible not throttled reduction of brake pressure at the
Radbremse 14 zu gestatteten, sobald der Fahrer die Betätigungskraft am Wheel brake 14 to allow, as soon as the driver, the actuation force on
Hauptbremszylinder 12 reduziert und folglich das Druckniveau am Master cylinder 12 reduces and consequently the pressure level at
Hauptbremszylinderanschluss 18 niedriger als am Radbremsanschluss 20 des Master cylinder connection 18 lower than the Radbremsanschluss 20 of
Druckmodulationsventils 16 ist. Der Bremskreis 10 ist ferner mit einem Betriebsartenumschaltventil 50 ausgestattet, das zwischen dem Hauptbremszylinder 12 und einem Pumpendruckanschluss 52 des Druckerzeugers 40 angeordnet ist. Dieses Betriebsartenumschaltventil 50 ist erfindungsgemäß in Form eines Wegeventils mit drei Druckmittelanschlüssen 54, 56, 58 ausgeführt, das sich von einem elektronisch ansteuerbaren Aktuator 60 entgegen der Kraft eines Rückstellelements 62 in drei diskrete Stellungen 64, 66, 68 umschalten lässt. Bei den drei Druckmittelanschlüssen handelt es sich um einen Pressure modulation valve 16 is. The brake circuit 10 is further equipped with an operating mode switching valve 50 which is disposed between the master cylinder 12 and a pump pressure port 52 of the pressure generator 40. This operating mode changeover valve 50 is designed according to the invention in the form of a directional control valve with three pressure medium connections 54, 56, 58, which can be switched by an electronically controllable actuator 60 against the force of a restoring element 62 into three discrete positions 64, 66, 68. The three pressure medium connections are one
Hauptbremszylinderanschluss 54, einen Pumpendruckanschluss 56 und einen Master brake cylinder port 54, a pump pressure port 56 and a
Pumpensauganschluss 58. In der gezeichneten Grundstellung 64 des Pump suction 58. In the illustrated basic position 64 of
Betriebsartenumschaltventils 50 besteht zwischen dem Hauptbremszylinderanschluss 54 und dem Pumpendruckanschluss 56 eine in beide Flussrichtungen durchströmbare Druckmittelverbindung, durch die Bremsfluid vom Hauptbremszylinder 12 zur Betriebsartenumschaltventils 50 consists between the master brake cylinder port 54 and the pump pressure port 56 a through-flow in both directions fluid connection, through the brake fluid from the master cylinder 12 to
Druckseite des Druckerzeugers 38, respektive zum Zulaufanschluss 18 des Pressure side of the pressure generator 38, respectively to the inlet port 18 of the
Druckmodulationsventils 16 strömt. Der Pumpensauganschluss 58 des Pressure modulation valve 16 flows. The pump suction port 58 of the
Betriebsartenumschaltventils 50 ist dabei abgesperrt, so dass der Druckerzeuger 38 allenfalls Druckmittel aus dem Rücklauf 34 ansaugen kann. Betriebsartenumschaltventils 50 is shut off, so that the pressure generator 38 can suck at most pressure fluid from the return 34.
In einer mittleren bzw. zweiten Stellung des Betriebsartenumschaltventils 50 sind alle drei Anschlüsse gegeneinander abgesperrt, weshalb diese Stellung auch als In a middle or second position of Betriebsartenumschaltventils 50 all three ports are shut off from each other, which is why this position as
Sperrstellung 66 bezeichnet wird. Lock position 66 is called.
In einer dritten Stellung des Betriebsartenumschaltventils 50 ist demgegenüber der Hauptbremszylinderanschluss 54 mit dem Pumpensauganschluss 58 verbunden, während der Pumpendruckanschluss 56 abgesperrt ist. Bremsfluid strömt demnach in dieser Ansaugstellung 68 vom Hauptbremszylinder 12 zum Pumpensauganschluss 40, so dass der Druckerzeuger 38 sowohl vom Hauptbremszylinder 12 als auch vom Rücklauf 34 mit Bremsfluid versorgt ist. In contrast, in a third position of the mode changeover valve 50, the master brake cylinder port 54 is connected to the pump suction port 58 while the pump pressure port 56 is shut off. Accordingly, brake fluid flows in this intake position 68 from the master brake cylinder 12 to the pump suction port 40, so that the pressure generator 38 is supplied with brake fluid both from the master brake cylinder 12 and from the return line 34.
Ein optional vorgesehener Bypass 70 zum Betriebsartenumschaltventil 50 verbindet den Hauptbremszylinderanschluss 54 mit dem Pumpendruckanschluss 56. Dieser Bypass 70 ist von einem Rückschlagventil 72 steuerbar, welches die An optionally provided bypass 70 to the operating mode changeover valve 50 connects the master brake cylinder port 54 with the pump pressure port 56. This bypass 70 is controlled by a check valve 72, which is the
Strömungsrichtung vom Hauptbremszylinderanschluss 54 zum Pumpendruckanschluss 56 freigibt und die Gegenrichtung sperrt. Das Rückschlagventil 72 ist exemplarisch federlos ausgeführt, wodurch dessen Ventilschließglied allein vom wirksamen hydraulischen Druck gegen einen Ventilsitz gepresst wird, um diesen zu verschließen. Flow direction from the master brake cylinder port 54 to the pump pressure port 56 releases and locks the opposite direction. The check valve 72 is exemplary designed featherless, whereby the valve closing member is pressed only by the effective hydraulic pressure against a valve seat to close this.
Funktional kann dieser Bypass 70 vorgesehen werden, falls das Functionally, this bypass 70 can be provided if the
Betriebsartenumschaltventil 50 aufgrund seiner kompakten Abmessungen den Mode switch valve 50 due to its compact dimensions
Druckmittelfluss vom Hauptbremszylinder 12 zu den Radbremsen 14 zu stark drosseln und damit einen durch Muskelkraft erzeugten Bremsdruckaufbau an den Radbremsen 14 des Bremskreises 10 behindern würde. Pressure fluid flow from the master cylinder 12 to the wheel brakes 14 too much throttle and thus hinder a generated by muscle brake pressure build-up on the wheel brakes 14 of the brake circuit 10 would hinder.
Der erfindungsgemäße Bremskreis 10 weist somit ausschließlich von elektronisch ansteuerbaren Aktuatoren 24; 60 gesteuerte 3/3-Wege-Schaltventile zur Steuerung des Druckmittelflusses bzw. zur Anpassung des Bremsdrucks an die The brake circuit 10 according to the invention thus has exclusively by electronically controllable actuators 24; 60 controlled 3/3-way switching valves for controlling the pressure medium flow or for adapting the brake pressure to the
Schlupfverhältnisse an den, den Radbremsen 14 zugeordneten Rädern auf. Er besteht folglich gegenüber einem konventionell mit 2/2-Wegeventilen bestückten Bremskreis aus weniger einzelnen Ventilen bzw. Baugruppen, benötigt entsprechend weniger Arbeitsschritte zur Montage derselben am Hydraulikaggregat und lässt eine besonders kompakte, also bauraumsparende, Ausgestaltung dieses Hydraulikaggregats zu. Slip on the, the wheel brakes 14 associated wheels. Consequently, compared with a brake circuit equipped conventionally with 2/2-way valves, it consists of fewer individual valves or assemblies, requires correspondingly fewer work steps for mounting the same on the hydraulic unit, and permits a particularly compact, thus space-saving design of this hydraulic unit.
Das Betriebsartenumschaltventil 50 und die Druckmodulationsventile 16 sind konstruktiv unterschiedlich ausgebildet, da sie sich insbesondere in ihrer jeweiligen dritten Stellung 32; 68 voneinander unterscheiden in denen sie verschiedene hydraulische Anschlüsse miteinander verbinden bzw. sperren. Darüber hinaus weisen sie aufgrund der sich einstellenden Druckverhältnisse unterschiedlich dimensionierte Ventilsitze und Schließkörper auf und bedürfen angesichts dessen unterschiedlich leistungsfähiger Aktuatoren zu ihrer jeweiligen Betätigung. Auch im zugeordneten Bypass 46; 70 unterscheidet sich das Betriebsartenumschaltventil 50 vom The Betriebsartenumschaltventil 50 and the pressure modulation valves 16 are structurally different, since they are in particular in their respective third position 32; 68 different from each other in which they connect or lock different hydraulic connections. In addition, they have due to the adjusting pressure ratios differently sized valve seats and closing body and require in view of the different powerful actuators to their respective operation. Also in the associated bypass 46; 70, the mode switching valve 50 is different from
Druckmodulationsventil 16, was anhand der in unterschiedliche Richtung sperrenden Rückschlagventile 48; 72 augenscheinlich wird. Pressure modulation valve 16, which is based on the blocking in different directions check valves 48; 72 becomes apparent.
Es ist denkbar, den Bypass 70 mit dem Rückschlagventil 72 und das It is conceivable, the bypass 70 with the check valve 72 and the
Betriebsartenumschaltventil 50 zu einer Baueinheit zusammenzufassen oder alternativ den Bypass 70 und das Rückschlagventil 72 losgelöst vom Betriebsartenumschaltventil 50 darzustellen. Die Funktion des beschriebenen Bremskreises 10 ist prinzipiell bekannt und soll daher im Folgenden lediglich des Verständnisses halber kurz angerissen werden: Mode switch valve 50 to summarize a unit or alternatively the bypass 70 and the check valve 72 detached from the operating mode changeover valve 50 represent. The function of the described brake circuit 10 is known in principle and should therefore be briefly touched upon below for the sake of clarity:
Im Blockierschutzbetrieb wird der Bremsdruck vom Fahrer durch Muskelkraftbetätigung des Hauptbremszylinders 12 erzeugt. Das Bremsartenumschaltventil 50 nimmt dabei seine Grundstellung 64 ein, ebenso wie die den verschiedenen Radbremsen 14 des Bremskreises 10 zugeordneten Druckmodulationsventile 16. Folglich besteht eine durchgehende Druckmittelverbindung vom Hauptbremszylinder 12 zu den Radbremsen 14, über welche ein Bremsdruckaufbau stattfindet. Ist der notwendige Bremsdruck erreicht, werden die Druckmodulationsventile 16 in ihre Sperrstellung 30 (mittlere Stellung) umgeschaltet und der Bremsdruck wird gehalten. Ein gegebenenfalls notwendiger Abbau des Bremsdrucks findet durch Umschalten der In anti-lock operation, the brake pressure is generated by the driver by muscular power of the master cylinder 12. The Bremsartenumschaltventil 50 assumes its basic position 64, as well as the various wheel brakes 14 of the brake circuit 10 associated pressure modulation valves 16. Consequently, there is a continuous pressure medium connection from the master cylinder 12 to the wheel brakes 14, via which a brake pressure build-up takes place. If the necessary brake pressure is reached, the pressure modulation valves 16 are switched to their blocking position 30 (middle position) and the brake pressure is maintained. Any necessary reduction of the brake pressure takes place by switching the
Druckmodulationsventile 16 in ihre dritte Stellung 32, in welcher die Radbremsen 14 mit dem Rücklauf 34 verbunden sind und der Zulauf 18 unterbrochen ist, statt. Pressure modulation valves 16 in its third position 32, in which the wheel brakes 14 are connected to the return 34 and the inlet 18 is interrupted instead.
Bremsfluid fließt dabei von den Radbremsen 14 in den Rücklauf 34 und weiter zur Pumpensauganschluss 40. Der durch Fremdkraft angetriebene Druckerzeuger 38 fördert das anstehende Bremsfluid durch das Betriebsartenumschaltventil 50 hindurch zum Hauptbremszylinder 12 zurück. Der Bypass 70 des Betriebsartenumschaltventils 50 wird nicht durchströmt, weil das Rückschlagventil 72 vom höheren Druck am Pumpendruckanschluss 56 des Betriebsartenumschaltventils 50 gegen seinen Sitz gedrückt wird und damit diese Flussrichtung absperrt. Brake fluid flows from the wheel brakes 14 in the return 34 and on to the pump suction port 40. The driven by external force pressure generator 38 promotes the upcoming brake fluid through the Betriebsartenumschaltventil 50 through to the master cylinder 12 back. The bypass 70 of the operating mode changeover valve 50 is not flowed through because the check valve 72 is pressed against its seat by the higher pressure at the pump pressure connection 56 of the operating mode changeover valve 50 and thus shuts off this flow direction.
Im Falle einer stattfindenden Antriebsschlupfregelung bzw. einer In the case of an ongoing traction control or a
Fahrstabilitätsregelung, bei der keine an den Bremsfall angepasste Betätigung des Hauptbremszylinders 12 durch den Fahrer erfolgt, nimmt das Driving stability control, in which no adapted to the brake case actuation of the master cylinder 12 by the driver, takes that
Betriebsartenumschaltventil 50 seine Ansaugstellung 68 ein und verbindet damit den Hauptbremszylinder 12 mit dem Sauganschluss 40 des Druckerzeugers 38. Mit dessen Antrieb durch den Antriebsmotor 42 wird Bremsfluid aus dem Hauptbremszylinder 12 angesaugt und unter Erhöhung des Drucks im Bremsfluid zu dem in seiner  Betriebsartenumschaltventil 50 its intake 68 and thus connects the master cylinder 12 with the suction port 40 of the pressure generator 38. With its drive by the drive motor 42 brake fluid is sucked from the master cylinder 12 and increasing the pressure in the brake fluid to the in his
Grundstellung 28 offenen Druckmodulationsventil 16 gefördert. Von dort strömt das Bremsfluid weiter in die Radbremse 14 und bewirkt dort einen Bremsdruckaufbau. Zum Druckhalten werden die Druckmodulationsventile 16 wieder ihre Mittelstellung bzw. Sperrstellung 30 umgeschaltet und zum Druckabbau in ihre jeweilige Basic position 28 open pressure modulation valve 16 promoted. From there, the brake fluid continues to flow into the wheel brake 14, where it causes a buildup of brake pressure. To keep pressure, the pressure modulation valves 16 are switched back to their middle position or blocking position 30 and to reduce pressure in their respective
Druckabbaustellung 32, wie bereits oben erläutert. Selbstverständlich sind Änderungen oder Ergänzungen gegenüber dem beschriebenenPressure reduction position 32, as already explained above. Of course, changes or additions to the described
Ausführungsbeispiel denkbar, ohne vom Grundgedanken der Erfindung abzuweichen. Embodiment conceivable without departing from the spirit of the invention.

Claims

Ansprüche claims
1. Elektronisch schlupfregelbare Fahrzeugbremsanlage, 1. electronically slip-controllable vehicle brake system,
mit einem durch Muskelkraft betätigbaren Hauptbremszylinder (12) und mit einem durch Fremdkraft antreibbaren Druckerzeuger (38) zur Versorgung einer mit dem Hauptbremszylinder (12) und dem Druckerzeuger (38) kontaktierten Radbremse (14) mit einem unter Bremsdruck stehendem Bremsfluid und  with a master cylinder (12) which can be actuated by muscle power and with a pressure generator (38) which can be driven by external force to supply a wheel brake (14) which is in contact with the master brake cylinder (12) and the pressure generator (38) and has brake fluid under brake pressure
mit einer elektronisch ansteuerbaren Ventileinrichtung (50) zur Steuerung der Druckmittelverbindungen des Hauptbremszylinders (12) mit der Radbremse (14) und des Hauptbremszylinders (12) mit einem Sauganschluss (40) des  with an electronically controllable valve device (50) for controlling the pressure medium connections of the master brake cylinder (12) with the wheel brake (14) and the master brake cylinder (12) with a suction port (40) of the
Druckerzeugers (38), dadurch gekennzeichnet,  Pressure generator (38), characterized
dass die Ventileinrichtung (50) ein einzelnes Ventil mit drei Druckmittelanschlüssen (54, 56, 58) umfasst, das über einen ansteuerbaren Aktuator (60) in drei diskrete Stellungen (64, 66, 68) schaltbar ist, in denen die Druckmittelanschlüsse (54, 56, 58) in unterschiedlichen Varianten miteinander verschaltet bzw. gegeneinander abgesperrt sind.  in that the valve device (50) comprises a single valve with three pressure medium connections (54, 56, 58) which can be switched via a controllable actuator (60) into three discrete positions (64, 66, 68), in which the pressure medium connections (54, 54) 56, 58) connected in different variants with each other or are locked against each other.
2. Elektronisch schlupfregelbare Fahrzeugbremsanlage nach Anspruch 1, 2. Electronically slip-controllable vehicle brake system according to claim 1,
dadurch gekennzeichnet, dass ein erster Druckmittelanschluss (54) der  characterized in that a first pressure medium connection (54) of
Ventileinrichtung (50) mit dem Hauptbremszylinder (12), ein zweiter  Valve means (50) with the master cylinder (12), a second
Druckmittelanschluss (56) mit einem Druckanschluss (52) des Druckerzeugers (38) und ein dritter Druckmittelanschluss (58) mit einem Sauganschluss (40) des  Pressure medium connection (56) with a pressure connection (52) of the pressure generator (38) and a third pressure medium connection (58) with a suction connection (40) of the
Druckerzeugers (38) kontaktiert ist.  Pressure generator (38) is contacted.
3. Elektronisch schlupfregelbare Fahrzeugbremsanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Ventileinreichtung (50) zudem einen Bypass (70) aufweist, welcher den ersten Druckmittelanschluss (54) zum Hauptbremszylinder (12) der Ventileinrichtung (50) mit dem zweiten Druckmittelanschluss (56) zum Druckanschluss (52) des Druckerzeugers (38) der Ventileinrichtung (50) verbindet, wobei im Bypass (70) ein Rückschlagventil (72) angeordnet ist, das den Bypass (70) in Strömungsrichtung vom zweiten Druckmittelanschluss (56) zum ersten 3. Electronically slip-controllable vehicle brake system according to claim 1 or 2, characterized in that the Ventileinreichtung (50) also has a bypass (70), which the first pressure medium connection (54) to the master cylinder (12) of the valve device (50) with the second pressure medium connection ( 56) to the pressure port (52) of the pressure generator (38) of the valve device (50), wherein in the bypass (70) a check valve (72) is arranged, the bypass (70) in the flow direction from the second pressure medium connection (56) to the first
Druckmittelanschluss (54) sperrt. Pressure medium connection (54) locks.
4. Elektronisch schlupfregelbare Fahrzeugbremsanlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Rückschlagventil (72) einen Schließkörper aufweist, der allein vom Druck des Bremsfluids gegen einen Ventilsitz gedrückt ist. 4. Electronically slip-controllable vehicle brake system according to one of claims 1 to 3, characterized in that the check valve (72) has a closing body which is pressed solely by the pressure of the brake fluid against a valve seat.
5. Elektronisch schlupfregelbare Fahrzeugbremsanlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Fahrzeugbremsanlage zur Modulation des Drucks in der Radbremse (14) jeweils eine zweite elektronisch ansteuerbare Ventileinrichtung (16) aufweist, welche von einem einzelnen Ventil mit drei 5. Electronically slip-controllable vehicle brake system according to one of claims 1 to 4, characterized in that the vehicle brake system for modulating the pressure in the wheel brake (14) each have a second electronically controllable valve means (16) which of a single valve with three
Druckmittelanschlüssen (18, 20, 22) gebildet ist, welches von einem elektronisch ansteuerbaren Aktuator (24) in drei diskrete Stellungen schaltbar ist.  Pressure medium connections (18, 20, 22) is formed, which is switchable by an electronically controllable actuator (24) in three discrete positions.
6. Elektronisch schlupfregelbare Fahrzeugbremsanlage nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass jede der elektronisch ansteuerbaren 6. Electronically slip-controllable vehicle brake system according to one of claims 1 to 5, characterized in that each of the electronically controllable
Ventileinrichtungen (16; 50) zur Steuerung der Fahrzeugbremsanlage mit drei Anschlüssen ausgestattet und in drei Schaltstellungen umschaltbar ist.  Valve means (16; 50) for controlling the vehicle brake system with three connections and is switchable into three switching positions.
7. Elektronisch schlupfregelbare Fahrzeugbremsanlage nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass in zwei der insgesamt drei Stellungen die Ventileinrichtungen (16; 50) von Bremsfluid durchströmt sind, dass in einer der Stellungen die Anschlüsse der Ventileinrichtungen (16; 50) gegeneinander gesperrt sind und dass die sperrende Stellung zwischen den beiden Stellungen in denen die Ventileinrichtung (16; 50) durchströmt ist, angeordnet ist. 7. Electronically slip-controllable vehicle brake system according to one of claims 1 to 6, characterized in that in two of the total of three positions, the valve means (16; 50) are flowed through by brake fluid, that in one of the positions, the connections of the valve means (16, 50) against each other are locked and that the blocking position between the two positions in which the valve means (16; 50) is flowed through, is arranged.
EP15719730.2A 2014-06-17 2015-05-06 Electronically slip-controllable vehicle brake system Withdrawn EP3157787A1 (en)

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DE102014211582.5A DE102014211582A1 (en) 2014-06-17 2014-06-17 Electronically slip-controllable vehicle brake system
PCT/EP2015/059906 WO2015193027A1 (en) 2014-06-17 2015-05-06 Electronically slip-controllable vehicle brake system

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DE102018210538A1 (en) * 2018-06-28 2020-01-02 Robert Bosch Gmbh Hydraulic braking system for a vehicle with at least two axles
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KR102633262B1 (en) * 2021-10-25 2024-02-02 현대모비스 주식회사 Brake Apparatus for Vehicle

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KR102350175B1 (en) 2022-01-17
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DE102014211582A1 (en) 2015-12-17
US10173654B2 (en) 2019-01-08

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