WO2008017548A1 - Système hydraulique de freinage de véhicule à régulation du glissement d'entraînement - Google Patents

Système hydraulique de freinage de véhicule à régulation du glissement d'entraînement Download PDF

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Publication number
WO2008017548A1
WO2008017548A1 PCT/EP2007/056870 EP2007056870W WO2008017548A1 WO 2008017548 A1 WO2008017548 A1 WO 2008017548A1 EP 2007056870 W EP2007056870 W EP 2007056870W WO 2008017548 A1 WO2008017548 A1 WO 2008017548A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
cylinder
wheel
hydraulic pump
valves
Prior art date
Application number
PCT/EP2007/056870
Other languages
German (de)
English (en)
Inventor
Horst Beling
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 WO2008017548A1 publication Critical patent/WO2008017548A1/fr

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
    • 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

Definitions

  • the invention relates to a slip-controlled hydraulic vehicle brake system having the features of the preamble of claim 1.
  • the known vehicle brake system has a master brake cylinder to which two brake circuits each having two wheel brake cylinders are connected.
  • Each wheel brake cylinder is preceded by a brake pressure build-up valve, via which the wheel brake cylinder is connected to the master brake cylinder, and a brake pressure reduction valve, via which the wheel brake cylinder is connected to a suction side of a hydraulic pump.
  • the hydraulic pump is also referred to as a return pump.
  • a pressure side of the return pump is connected to the brake pressure build-up valve on a side facing away from the wheel brake cylinder, that is, the pressure side of the hydraulic pump is connected to the master cylinder and the brake pressure build-up valve.
  • a brake pressure build-up valve and a brake pressure reduction valve are provided for each wheel brake cylinder, which are connected in common to a hydraulic pump in each brake circuit.
  • the hydraulic pumps of both (all) brake circuits can be driven together with an electric motor.
  • the brake pressure increase valve and the brake pressure reduction valve of a wheel brake cylinder form a brake pressure modulation valve arrangement of the wheel brake cylinder, with which knew way a wheel-specific brake pressure control, so a slip control is possible.
  • slip control is meant a Bremsblockiertikwort, traction control and / or vehicle dynamics control, for which the abbreviations ABS, ASR, FDR and ESP are common.
  • a brake fluid reservoir is placed, but this is not mandatory, the brake fluid reservoir can also be located elsewhere.
  • the suction side of the hydraulic pump is connected to the brake fluid reservoir.
  • the hydraulic pump of the vehicle brake system according to the invention therefore does not draw brake fluid from the brake master cylinder or through the master cylinder from the brake fluid reservoir, which communicatively communicates with the master cylinder through narrow sniffer holes or the like and therefore has a large flow resistance, but the hydraulic pump of the vehicle brake system according to the invention sucks to the brake fluid reservoir.
  • a flow resistance on the suction side of the hydraulic pump is considerably lower, a brake pressure build-up with the hydraulic pump when the master cylinder is not actuated is considerably accelerated. Especially with cold and as a result of its viscous brake fluid, the brake pressure build-up is improved with the hydraulic pump.
  • a brake pressure buildup with the hydraulic pump when not actuated master cylinder takes place in a traction control system and partially in a vehicle dynamics control, especially in the vehicle dynamics control a rapid pressure build-up is crucial to counteract a spin tendency of a vehicle earliest possible possible.
  • Another advantage of the invention is that a vacuuming of the wheel brake cylinder is avoided with the hydraulic pump, because the hydraulic pump sucks from the brake fluid reservoir.
  • Another advantage of the invention is that a hydraulic accumulator can be omitted on the side facing away from the wheel brake cylinder side of the brake pressure reduction valves and the suction side of the hydraulic pump.
  • This hydraulic accumulator is used in known hydraulic vehicle brake systems for receiving and intermediate storage of brake fluid from the wheel brake cylinders and as a reservoir for the hydraulic pump in a slip control.
  • the outlet of brake fluid from the wheel brake cylinders of the vehicle brake system according to the invention by the Bremsdruckabsenkventile in a slip control takes place against the pressure prevailing in the brake fluid reservoir atmospheric pressure.
  • Brake pressure build-up valves for the wheel brake cylinders, via which the wheel brake cylinders are connected to the master brake cylinder, are not absolutely necessary for the invention, but can in embodiments of the invention omitted.
  • a slip control is possible only with the brake pressure reduction valves.
  • Claim 2 provides that the suction side of the hydraulic pump and the sides of the brake pressure reduction valves facing away from the wheel brake cylinders are connected directly to the brake fluid reservoir. This means that no hydraulic components, in particular no magnetic or other valve in a line from the master cylinder to the suction side of the hydraulic pump and the wheel brake cylinders facing away from the Bremstikabsenkventile is arranged. The flow resistance on the suction side of the hydraulic pump is kept low in order to ensure a rapid buildup of brake pressure with the hydraulic pump.
  • Claim 3 provides brake pressure build-up valves, via which the wheel brake cylinders are connected to the master cylinder.
  • the slip control of the vehicle brake system is improved.
  • the pressure side of the hydraulic pump is connected between the master cylinder and the brake pressure build-up valves.
  • Claim 4 provides an isolation valve for each brake circuit, with which the brake circuit is connected to the master cylinder. With the isolation valve, the brake circuit can be separated during a slip control of the master cylinder to avoid repercussions such as a vibrating pedal by pressure pulsations in the slip control. In addition, a closed when not actuated master cylinder isolation valve prevents that funded with the hydraulic pump brake fluid flows into the master cylinder. The pressure side of the hydraulic pump is connected between the isolation valve and the brake pressure build-up valves.
  • FIGURE shows a hydraulic circuit diagram of a vehicle brake system according to the invention.
  • the inventive hydraulic vehicle brake system 1 shown in the drawing has a slip control (anti-lock control ABS, traction control system ASR, vehicle dynamics control FDR, ESP). They are designed as a two-circuit brake system with two brake circuits I, II, which are connected to a master cylinder 2.
  • the master cylinder 2 has a brake fluid reservoir 3, which is placed on it.
  • Each brake circuit I, Il is connected via a separating valve 4 to the master cylinder 2.
  • the isolation valves 4 are in their currentless normal position open 2/2-way solenoid valves.
  • the isolation valves 4 are each a hydraulically connected in parallel from the master cylinder 2 to Radbremszylindern 5 check valve 6.
  • each brake circuit I, Il the wheel brake cylinder 5 are connected via brake pressure build-up valves 7.
  • the brake pressure build-up valves 7 are in their currentless home position open 2/2-way solenoid valves. They are check valves 8 connected in parallel, which can be flowed through by the wheel brake cylinders 5 in the direction of the master cylinder 2.
  • a brake pressure reduction valve 9 is connected, which are connected together to a suction side of a hydraulic pump 10.
  • the Bremstikabsenkventile 9 are designed as closed in their currentless home position 2/2-way solenoid valves.
  • a pressure side of the hydraulic pump 10 is connected between the brake pressure build-up valves 7 and the isolation valves 4, ie, the pressure side of the hydraulic pump 10 is connected to the wheel brake cylinders 5 via the brake pressure build-up valves 7 and to the master cylinder 2 via the isolation valve 4.
  • Each of the two brake circuits I, Il has a hydraulic pump 10, which are drivable together with an electric motor 11.
  • the suction side of the hydraulic pumps 10 are directly, that is not connected to the brake fluid reservoir 3 via the master cylinder 2 and also without the interposition of hydraulic components such as in particular solenoid valves.
  • the hydraulic pumps 10 suck brake fluid directly from the brake fluid reservoir 3, in a slip control by opening the Bremsdruckabsenkventile 9 from the Radbremszylindern 5 flowing brake fluid flows at atmospheric pressure in the brake fluid reservoir 3, if it is not funded by the hydraulic pump 10.
  • a reduction of a Radbremstiks in the Radbremszylindern 5 substantially below atmospheric pressure when opening the Bremstikabsenkventile 9 is excluded by the connection of the wheel brake cylinder 5 via the Bremstikabsenkventile 9 to the brake fluid reservoir 3, in the atmospheric pressure.
  • a slight lowering of the pressure below atmospheric pressure by a suction effect of the hydraulic pump 10 is possible.
  • the brake pressure build-up valves 7 and the brake pressure reduction valves 9 form wheel brake pressure modulation valve arrangements, with which a wheel-specific brake pressure control for slip control in a manner known per se and not explained here is possible with the hydraulic pump 10 driven.
  • the brake pressure build-up valves 7 are not absolutely necessary, they can be omitted in simplified embodiments of the invention. Since the Bremstikabsenkventile 9 are connected directly to the brake fluid reservoir 3, in the ambient pressure prevails, the wheel brake in the Radbremszylindern 5 can be lowered by opening the Bremstikabsenkventile 9 always to ambient pressure.
  • the wheel brake pressures in the wheel brake cylinders 5 can be controlled individually with the brake pressure reduction valves 9 and without the brake pressure build-up valves 7.
  • the slip control is therefore without the brake pressure build-up valves 7th because of possible without the brake pressure build-up valves 7.
  • the isolation valves 4 should be present when the brake pressure build-up valves 9 are omitted. The isolation valves 4 are closed during a slip control, so that an undesired yielding of a predominantlybremspedals or hand brake lever is avoided.
  • the check valves 6, which are connected in parallel hydraulically to the separating valves 4, should be omitted with the brake pressure build-up valves 7 for a given reason, to avoid unwanted yielding of a foot brake pedal or handbrake lever. With the brake pressure build-up valves 7, the quality slip control is improved, however.
  • the isolation valves 4 are closed and the brake circuits I, Il characterized hydraulically separated from the master cylinder 2.
  • repercussions in particular a vibrating foot brake pedal or, in particular in the case of a motorcycle, a vibrating hand brake lever, are avoided by pressure pulsations of the brake fluid as a result of the brake pressure modulation.
  • the closed isolation valves 4 prevent that funded by the hydraulic pumps 10 brake fluid flows back into the master cylinder 2 when it is not actuated. Due to the design of the master cylinder 2 separates the brake fluid reservoir 3 hydraulically when it is actuated. A backflow of brake fluid, which is funded by the hydraulic pumps 10, in the master cylinder 2 is therefore excluded when the master cylinder 2 is actuated.
  • the isolation valves 4 do not necessarily have to be closed. Since the main brake cylinder 2 is always actuated in the case of an anti-lock control, the separating valves 4 can be dispensed with in simplified embodiments of the invention if the vehicle brake system 1 is provided exclusively for an anti-lock control. In a muscle-operated vehicle brake system 1, the separating valves 4 and the brake pressure build-up valves 7 should not be omitted.

Abstract

L'invention concerne un système (1) hydraulique de freinage de véhicule à régulation du glissement d'entraînement, avec un maître-cylindre de frein (2) auquel sont raccordés des cylindres de frein de roue (5). Les cylindres de frein de roue (5) sont raccordés à des pompes hydrauliques (10) via des soupapes (9) d'abaissement de pression de freinage. Selon l'invention, les pompes hydrauliques (10) et les cylindres de frein de roue (5) sont raccordés via les soupapes (9) d'abaissement de pression de freinage à un réservoir (3) de liquide de freinage monté sur le maître-cylindre de frein (2), et non au maître-cylindre de frein (2). On n'a ainsi pas besoin d'accumulateurs hydrauliques supplémentaires pour recevoir et stocker temporairement du liquide de frein provenant des cylindres de frein de roue (5) pendant une régulation du glissement d'entraînement, on évite un vidage par aspiration des cylindres de frein de roue (5), et on permet une rapide montée en pression avec les pompes hydrauliques (10) lorsque le maître-cylindre de frein (2) n'est pas actionné.
PCT/EP2007/056870 2006-08-09 2007-07-06 Système hydraulique de freinage de véhicule à régulation du glissement d'entraînement WO2008017548A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610037171 DE102006037171A1 (de) 2006-08-09 2006-08-09 Schlupfgeregelte hydraulische Fahrzeugbremsanlage
DE102006037171.2 2006-08-09

Publications (1)

Publication Number Publication Date
WO2008017548A1 true WO2008017548A1 (fr) 2008-02-14

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PCT/EP2007/056870 WO2008017548A1 (fr) 2006-08-09 2007-07-06 Système hydraulique de freinage de véhicule à régulation du glissement d'entraînement

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Country Link
DE (1) DE102006037171A1 (fr)
WO (1) WO2008017548A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928118A1 (fr) * 2008-03-03 2009-09-04 Peugeot Citroen Automobiles Sa Systeme de regulation du freinage pour le controle de stabilite et de trajectoire d'un vehicule automobile
DE102009045714A1 (de) 2009-04-28 2010-11-04 Continental Teves Ag & Co. Ohg Schlupfgeregelte hydraulische Fahrzeugbremsanlage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017219494A1 (de) 2017-11-02 2019-05-02 Robert Bosch Gmbh Verfahren zur Erkennung von Bremsfading in einer elektronisch schlupfregelbaren Fahrzeugbremsanlage

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705311A1 (de) * 1987-02-19 1988-09-01 Teves Gmbh Alfred Hydraulische bremsanlage fuer kraftfahrzeuge
DE3734903A1 (de) * 1987-10-15 1989-05-03 Teves Gmbh Alfred Hydraulische bremsanlage fuer kraftfahrzeuge mit abs
DE3912322A1 (de) * 1987-10-17 1990-10-18 Teves Gmbh Alfred Blockiergeschuetzte, hydraulische bremsanlage
DE4014052A1 (de) * 1990-05-02 1991-11-07 Teves Gmbh Alfred Bremsdruckregelvorrichtung
EP0566344A1 (fr) * 1992-04-14 1993-10-20 Lucas Industries Public Limited Company Systèmes hydrauliques de freinage pour véhicules
WO1993021047A1 (fr) * 1992-04-22 1993-10-28 Itt Automotive Europe Gmbh Dispositif de freinage hydraulique avec systeme d'antipatinage au freinage et a l'acceleration
WO1993022169A1 (fr) * 1992-05-02 1993-11-11 Itt Automotive Europe Gmbh Circuit pour systemes de freinage pourvu d'un systeme antipatinage a l'acceleration (asr)
DE19501760A1 (de) * 1995-01-21 1996-07-25 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung eines ABS/ASR-Systems

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3705311A1 (de) * 1987-02-19 1988-09-01 Teves Gmbh Alfred Hydraulische bremsanlage fuer kraftfahrzeuge
DE3734903A1 (de) * 1987-10-15 1989-05-03 Teves Gmbh Alfred Hydraulische bremsanlage fuer kraftfahrzeuge mit abs
DE3912322A1 (de) * 1987-10-17 1990-10-18 Teves Gmbh Alfred Blockiergeschuetzte, hydraulische bremsanlage
DE4014052A1 (de) * 1990-05-02 1991-11-07 Teves Gmbh Alfred Bremsdruckregelvorrichtung
EP0566344A1 (fr) * 1992-04-14 1993-10-20 Lucas Industries Public Limited Company Systèmes hydrauliques de freinage pour véhicules
WO1993021047A1 (fr) * 1992-04-22 1993-10-28 Itt Automotive Europe Gmbh Dispositif de freinage hydraulique avec systeme d'antipatinage au freinage et a l'acceleration
WO1993022169A1 (fr) * 1992-05-02 1993-11-11 Itt Automotive Europe Gmbh Circuit pour systemes de freinage pourvu d'un systeme antipatinage a l'acceleration (asr)
DE19501760A1 (de) * 1995-01-21 1996-07-25 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung eines ABS/ASR-Systems

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928118A1 (fr) * 2008-03-03 2009-09-04 Peugeot Citroen Automobiles Sa Systeme de regulation du freinage pour le controle de stabilite et de trajectoire d'un vehicule automobile
EP2098426A1 (fr) * 2008-03-03 2009-09-09 Peugeot Citroën Automobiles S.A. Système de régulation du freinage pour le contrôle de stabilité et de trajectoire d'un véhicule automobile
DE102009045714A1 (de) 2009-04-28 2010-11-04 Continental Teves Ag & Co. Ohg Schlupfgeregelte hydraulische Fahrzeugbremsanlage
WO2010124952A1 (fr) 2009-04-28 2010-11-04 Continental Teves Ag & Co. Ohg Système de freinage hydraulique pour véhicule avec régulation du glissement

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