WO2007071558A1 - Procede de fonctionnement d'une installation de freinage hydraulique dans des vehicules a moteur - Google Patents

Procede de fonctionnement d'une installation de freinage hydraulique dans des vehicules a moteur Download PDF

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Publication number
WO2007071558A1
WO2007071558A1 PCT/EP2006/069361 EP2006069361W WO2007071558A1 WO 2007071558 A1 WO2007071558 A1 WO 2007071558A1 EP 2006069361 W EP2006069361 W EP 2006069361W WO 2007071558 A1 WO2007071558 A1 WO 2007071558A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
brake
hydraulic
valves
electrical switching
Prior art date
Application number
PCT/EP2006/069361
Other languages
German (de)
English (en)
Inventor
Roland Gröschl
Michael Hitzel
Martin Baechle
Original Assignee
Continental Teves Ag & Co. Ohg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Publication of WO2007071558A1 publication Critical patent/WO2007071558A1/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
    • 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
    • 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
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/06—Hill holder; Start aid systems on inclined road

Definitions

  • the present invention relates to a method for operating a hydraulic brake system for motor vehicles, comprising a service brake system and a parking brake device, the service brake system having a pedalbetä- tigable, hydraulic pressure transducer with a master cylinder downstream, are connected to the two brake circuits with at least one externally controllable hydraulic pump , wherein in each case a brake circuit is a separating valve, an electric switching valve and a provided with inlet and outlet valves hydraulically actuated front wheel and associated with inlet and outlet valves hydraulically actuated rear axle wheel brake is assigned, and wherein the parking brake device comprises means for locking the Having brake piston of the rear axle wheel brakes, wherein for the initiation or termination of a parking brake operation, the brake piston of Hinte- rachs wheel brakes with one of the hydraulic pump available be applied tion hydraulic pressure.
  • the electrical switching valves are controlled such that a smaller volume of pressure medium flows from the master cylinder to the pump as is predicable by the pump.
  • the pulse-pause ratio for the pulsation-like opening and closing of the electrical changeover valves is selected so that the volume of hydraulic pressure medium flowing through the electrical changeover valves is less than that volume of hydraulic pressure medium required by the pump, which is determined from the product of the pump speed with the pump displacement.
  • the pump speed is determined by means of a voltage model.
  • the pulsation-like opening and closing of the electrical switching valves for the brake circuits is in push-pull.
  • FIG. 1 The schematic diagram of a brake system for motor vehicles shown schematically in FIG. 1 has two brake circuits I, II. Each of the two brake circuits I, II is associated with a front axle wheel brake 2 and a rear wheel brake 3. One speaks in such an arrangement also of a diagonal division.
  • the rear axle wheel brakes 3 with locking means will be described in more detail.
  • the wheel brakes 2, 3 are acted upon via inlet valves 7, 13 by a pedal-operated pressure transducer 10, which is shown in Fig. 1 as a vacuum brake booster with downstream master cylinder 1, with pressure.
  • the brake system has an electronic control unit 9, as well as for the wheel brakes 2, 3 on both vehicle axles two hydraulic pumps 4, 20, which together for the implementation of anti-lock regulations (ABS) and regulations in the electronic stability program (ESP) are necessary.
  • ABS anti-lock regulations
  • ESP electronic stability program
  • the generate hydraulic pumps 4, 20 a necessary for the activation and deactivation of the parking brake device hydraulic pressure, as will be explained in more detail below.
  • the isolation valve 6 is a normally open SO valve and is needed for all controls during an active pressure build-up by the hydraulic pumps 4, 20.
  • the isolation valves 6 are closed in these active pressure buildup phases by the hydraulic pumps 4, 20, so that the pressure build-up is not controlled in the master cylinder 1.
  • the electrical switching valve 5 - also called EUV for short - is a normally closed SG valve, which establishes or interrupts a connection between the master brake cylinder 1 and the suction side of the pump 4, 20. In the activated state, the electrical switching valve is open and the pump 4, 20 can suck brake fluid from the master cylinder 1 and provide, for example, for a traction control available.
  • a rear axle wheel brake 3 with integrated parking brake function is described, for example, in DE 10 2004 062 810 A1 and will not be explained again in detail here.
  • the content of DE 10 2004 062 810 A1 is intended to be incorporated by reference into this disclosure.
  • a hydraulic pressure is built up by the aforementioned hydraulic pumps 4, 20.
  • an electromagnet is energized, whereby the rear axle wheel brake is locked in its applied state.
  • the electromagnet will not work more energized and the armature plate 21 and the power transmission element 39 are no longer maintained.
  • the rear axle wheel brakes thus need no energy and no hydraulic pressure to maintain the lock in the applied state.
  • the vehicle driver on the brake pedal 11 senses the pump suction pulsations of the hydraulic pumps 4, 20, which is perceived as disturbing.
  • the pressure applied by the driver via the pressure transducer 10 loads on the suction side of the pump 4, 20, which can lead to jamming of the pump mechanism in the most serious case.
  • the pump 4, 20 subject to load changes with suction upstream form a greatly increased wear, resulting in a reduced life.
  • One way to decouple the brake pressure from the pump driver via the pedal-operated pressure transducer 10 from the pump suction side is to allow suitable circuitry for the electrical changeover valves 5 to flow through only as much fluid volume as can be carried away by the pump 4, 20.
  • the pump runs slightly suction throttled.
  • the hydraulic pump 4, 20 is operated with suction throttling, if at the same time the operation of the hydraulic pump 4, 20 during the initiation or termination of a parking brake operation of the pedalbetätigba- repressor 10 is actuated by the driver.
  • the electrical switching valves 5 are activated in such a way. ert that a smaller volume of pressure medium flows from the master cylinder 1 to the pump 4, 20 as by the pump 4, 20 is fordable.
  • the separating valves 6 are closed.
  • the intake valves 13 of the front-wheel brakes 2 are also closed.
  • the pumps 4, 20 are driven with a predetermined timing pattern. The result is a speed of the pumps 4,20 and thus a certain, depending on the geometric characteristics of the pump 4, 20 volume flow.
  • Such a clock pattern, with which the pumps 4, 20 are driven for example, 8ms on and 12ms off. Since the electrical switching valves 5 are closed, a cavitation bubble is formed in the suction space between the check valve 19 on the suction side of the pump 4, 20 and the electrical switching valve 5.
  • the electrical switching valves 5 are now activated with a short pulse, that is, it opens Only a very short and it flows a comparatively small volume of pressure medium from the master cylinder 5 to the suction side of the pump 4, 20.
  • This comparatively small volume of pressure medium is dependent on the pulse length with which the electrical switching valve 5 is opened and the pressure difference between the master cylinder 1 and the Suction side of the pump 4, 20.
  • the pulse length for short-term opening of the electrical switching valve is dimensioned so that the flowed-through volume of pressure medium, although the Kavitationsblase reduced, but not completely closed.
  • the pump 4, 20 increases the Kavitationsblase by demanding the flowed-through pressure medium volume again.
  • the next opening pulse the electrical switching valve 5 is supplied. This means that at no time the predetermined by FFV on the pressure transducer 10 pressure on the suction side of the pump 4, 20 is applied.
  • the pulse width just mentioned for short-term opening of the electrical switching valve 5 or the pulse-pause ratio at the electrical switching valve 5 is thus chosen such that the volume of hydraulic pressure medium flowing through the electrical switching valves 5 is less than the volume of hydraulic pressure medium demandable by the pump 4, 20.
  • the volume of hydraulic pressure medium required by the pump 4, 20 is determined from the mathematical product of the pump speed and the pump displacement.
  • the pump stroke is known from the pump geometry, while the pump speed is determined for example by means of a voltage model.
  • analogue controllable valves can be used as switching valves 5, with which a gleichoniaiger volume flow can be realized.
  • a pulsed control is not necessary in this alternative embodiment.

Landscapes

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

Abstract

L'invention concerne un procédé de fonctionnement d'une installation de freinage hydraulique dans des véhicules à moteur, laquelle comprend un système de frein de service et un dispositif de frein de stationnement. Selon l'invention, pour amorcer ou interrompre le fonctionnement du frein de stationnement, les pistons des freins de roues arrière (3) sont soumis à une pression hydraulique développée par une pompe hydraulique (4, 20). L'invention vise à prolonger la durée de vie de la pompe hydraulique (4, 20). A cet effet, cette pompe hydraulique (4, 20) est étranglée en aspiration lorsque, simultanément au fonctionnement de ladite pompe hydraulique (4, 20) lors de l'amorce ou de l'interruption du fonctionnement du frein de stationnement par l'élément de commande, le capteur de pression (10) asservi à l'actionnement d'une pédale est également actionné par le pilote du véhicule.
PCT/EP2006/069361 2005-12-21 2006-12-06 Procede de fonctionnement d'une installation de freinage hydraulique dans des vehicules a moteur WO2007071558A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102005061744 2005-12-21
DE102005061744.1 2005-12-21
DE102006042930A DE102006042930A1 (de) 2005-12-21 2006-09-13 Verfahren zum Betrieb einer hydraulischen Bremsanlage für Kraftfahrzeuge
DE102006042930.3 2006-09-13

Publications (1)

Publication Number Publication Date
WO2007071558A1 true WO2007071558A1 (fr) 2007-06-28

Family

ID=37716207

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/069361 WO2007071558A1 (fr) 2005-12-21 2006-12-06 Procede de fonctionnement d'une installation de freinage hydraulique dans des vehicules a moteur

Country Status (2)

Country Link
DE (1) DE102006042930A1 (fr)
WO (1) WO2007071558A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009138294A2 (fr) * 2008-05-14 2009-11-19 Robert Bosch Gmbh Procédé de réglage du système de freinage d'un véhicule motorisé

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010029391B4 (de) 2009-06-05 2023-03-30 Continental Automotive Technologies GmbH Verfahren zum Unterstützen einer elektrischen Parkbremse eines Fahrzeugs
DE102009052485A1 (de) * 2009-11-09 2011-05-12 Lucas Automotive Gmbh Druckerzeuger für eine mehrkreisige Fahrzeugbremsanlage
DE102022203752A1 (de) 2022-04-13 2023-10-19 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Verteilung einer Bremslast und Bremsvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998000322A1 (fr) * 1996-07-01 1998-01-08 Itt Manufacturing Enterprises, Inc. Installation de freinage hydraulique pourvue d'un dispositif de precharge
WO2004089713A1 (fr) * 2003-04-08 2004-10-21 Continental Teves Ag & Co. Ohg Procede pour faire fonctionner un systeme de freinage hydraulique a fonction de freinage de stationnement integree sur des vehicules
DE10327566A1 (de) * 2003-06-18 2005-01-05 Robert Bosch Gmbh Verfahren zur Betätigung einer Fremdkraft-Feststellbremsanlage einer hydraulischen Fahrzeugbremsanlage
DE102004062810A1 (de) * 2004-02-09 2005-09-01 Continental Teves Ag & Co. Ohg Hydraulische Fahrzeugbremse
WO2005115816A1 (fr) * 2004-05-24 2005-12-08 Lucas Automotive Gmbh Procede pour freiner un vehicule au moyen d'une installation de freinage a commande fluidique, et installation de freinage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998000322A1 (fr) * 1996-07-01 1998-01-08 Itt Manufacturing Enterprises, Inc. Installation de freinage hydraulique pourvue d'un dispositif de precharge
WO2004089713A1 (fr) * 2003-04-08 2004-10-21 Continental Teves Ag & Co. Ohg Procede pour faire fonctionner un systeme de freinage hydraulique a fonction de freinage de stationnement integree sur des vehicules
DE10327566A1 (de) * 2003-06-18 2005-01-05 Robert Bosch Gmbh Verfahren zur Betätigung einer Fremdkraft-Feststellbremsanlage einer hydraulischen Fahrzeugbremsanlage
DE102004062810A1 (de) * 2004-02-09 2005-09-01 Continental Teves Ag & Co. Ohg Hydraulische Fahrzeugbremse
WO2005115816A1 (fr) * 2004-05-24 2005-12-08 Lucas Automotive Gmbh Procede pour freiner un vehicule au moyen d'une installation de freinage a commande fluidique, et installation de freinage
DE102004025402B4 (de) * 2004-05-24 2006-05-11 Lucas Automotive Gmbh Verfahren zum Bremsen eines Fahrzeugs mittels einer fluidisch ansteuerbaren Fahrzeugbremsanlage und Fahrzeugbremsanlage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009138294A2 (fr) * 2008-05-14 2009-11-19 Robert Bosch Gmbh Procédé de réglage du système de freinage d'un véhicule motorisé
WO2009138294A3 (fr) * 2008-05-14 2010-08-19 Robert Bosch Gmbh Procédé de réglage du système de freinage d'un véhicule motorisé

Also Published As

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