EP0591237A1 - Dispositif de freinage hydraulique avec systeme d'antiblocage et d'antipatinage a l'acceleration, en particulier pour vehicules automobiles - Google Patents

Dispositif de freinage hydraulique avec systeme d'antiblocage et d'antipatinage a l'acceleration, en particulier pour vehicules automobiles

Info

Publication number
EP0591237A1
EP0591237A1 EP92910375A EP92910375A EP0591237A1 EP 0591237 A1 EP0591237 A1 EP 0591237A1 EP 92910375 A EP92910375 A EP 92910375A EP 92910375 A EP92910375 A EP 92910375A EP 0591237 A1 EP0591237 A1 EP 0591237A1
Authority
EP
European Patent Office
Prior art keywords
brake
valve
line
pressure
shut
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Withdrawn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
EP92910375A
Other languages
German (de)
English (en)
Inventor
Wolf-Dieter Jonner
Wolfgang Bernhardt
Helmut Pueschel
Guenther Schmidt
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 EP0591237A1 publication Critical patent/EP0591237A1/fr
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • Hydraulic brake systems with anti-lock and traction slip devices especially for motor vehicles
  • the invention relates to a hydraulic brake system with anti-lock and traction control device according to the preamble of the main claim.
  • shut-off valve in the suction line has a spring-operated blocking position and an electromagnetically switchable passage position as the basic position.
  • This shut-off valve is provided for the suction control of the high pressure pump. H. in traction control mode, the valve only releases the connection to the master brake cylinder if the high-pressure pump is to deliver pressure medium.
  • a particular advantage is the fact that a low-pressure storage chamber that is partially filled after an anti-lock or traction control operation can automatically drain into the master cylinder after releasing the brake pedal via the check valve and the second shut-off valve that assumes its open position.
  • the hydraulic brake system 1 shown in the drawing is intended for use in motor vehicles, in particular passenger cars.
  • the brake system 1 has a two-circuit master brake cylinder 3 which can be actuated by a brake pedal 2 and has a pressure medium reservoir 4.
  • a first brake circuit I of the brake system 1 is wheel brakes 4, 5 of non-driven vehicle wheels, e.g. B. assigned to the front axle of the vehicle.
  • the brake system 1 therefore has the so-called TT brake circuit division.
  • the brake circuit II associated with the solution according to the invention is explained in more detail below:
  • the brake circuit II has a brake line 10 starting from the master brake cylinder 3 and leading to the wheel brake 6.
  • a brake line 11 branches from this brake line 10 to the second wheel brake 7 of this brake circuit II.
  • a first shut-off valve 12 in the form of a 2/2-way valve with a spring-operated passage position 12a and an electromagnetically switchable blocking position 12b is arranged in the brake line 10 on the master cylinder side.
  • Valve arrangements 13, 14 are provided on the wheel brake side for the brake pressure in the wheel brakes 6, 7.
  • Each valve arrangement 13, 14 has an inlet valve 15, which is arranged in the corresponding brake line 10, 11 and controls the inflow of pressure medium to the wheel brake 6, 7.
  • a return line 16, 17 extends from the associated brake line 10, 11.
  • an outlet valve 18 of the valve north openings 13, 14 is arranged.
  • the outlet valve 18 is also designed as a 2/2-way valve; however, it has a spring-operated blocking position 18a and an electromagnetically switchable passage position 18b.
  • the return lines 16, 17 are combined after the two outlet valves 18 in a return line 19, to which a low-pressure storage chamber 20 is connected.
  • a check valve 23 with a passage direction is connected between the connection of the feed chambers 20 and the high-pressure pump 22.
  • the high-pressure pump 22 On the pressure side, the high-pressure pump 22 has a feed line 24 opening into the brake line 10 between the shut-off valve 12 and the valve arrangements 13, 14.
  • the self-priming high-pressure pump 22 is also connected on the suction side to a suction line 27, which emanates from the brake line 10 between the master brake cylinder 3 and the shut-off valve 12 and flows between the check valve 23 and the high-pressure pump 22 into the return line 19.
  • a second shut-off valve 28 in the form of a 2/2-way valve is arranged in the suction line 27.
  • the second shut-off valve 28 has a spring-operated passage position 28a and a hydraulically switchable blocking position 28b as the basic position. To generate this position, the second shut-off valve 28 is connected by a control line 29 to the section of the suction line 27 on the master cylinder side.
  • an overflow line 30 with a pressure relief valve 31 is provided between the first shut-off valve 12 and the connection of the feed line 24 from the brake line 10 and opens into the section of the suction line 27 on the master cylinder side.
  • this pressure-limiting valve 31 the pressure that can be generated by the high-pressure pump 22 can be limited in the brake line 10 when the first shut-off valve 12 assumes its blocking position 12b.
  • the elements of the brake system 1 which are arranged between the master brake cylinder 3 and the wheel brakes 4, 5, 6, 7 are part of an anti-lock and traction control device 34, to which an electronic control unit 35 and the wheel speed sensors 36 assigned to the individual vehicle wheels belong.
  • the control unit 35 can evaluate signals from the wheel speed sensors 36 and convert them into switching signals for the drive motor 21 and the various electromagnetically actuated valves of the brake system 1. Brake control control operation as well as drive Slip control operation possible, while the brake circuit I, not explained in more detail, only enables anti-lock control operation.
  • the hydraulic brake system 1 has the following functions, which are explained using the brake circuit II:
  • the first shut-off valve 12 and the inlet valves 15 and the outlet valves 18 of the valve arrangements 13, 14 assume the position shown.
  • the electric drive motor 21 is out of operation.
  • the pressure generated in the master brake cylinder 3 by actuating the brake pedal 2 is transmitted into the wheel brakes 6, 7 by shifting partial pressure medium quantities through the brake lines 10, 11.
  • the pressure generated by the master brake cylinder 3 is also effective in the section of the suction line 27 on the side of the master cylinder and in the control line 29, so that the second shut-off valve 28 is switched into its blocking position 28b.
  • the second shut-off valve 28 returns to its normal position, the open position 28a, due to pressure relief in the suction line 27.
  • the control unit 35 puts the high-pressure pump 22 into operation and switches the first shut-off valve 12 into the blocking position 12b and the inlet valve 15 of the valve arrangement 14 into the blocking position 15b. Since there is no actuation of the brake pedal 2, the second shut-off valve 28 is in its open position 28a.
  • the high-pressure pump 22 can therefore suck pressure medium through the suction line 27 from the master brake cylinder 3 and convey it through the feed line 24 into the brake line 10.
  • the brake pressure in the wheel brake 6 is now modulated in a known manner.
  • Pressure medium delivered by the high-pressure pump 22, but not removed by the wheel brake 6, is diverted through the overflow line 30 and the pressure-limiting valve 31 to the suction line 27.
  • the high-pressure pump 22 is switched off and the valves 12, 15, 18 are returned to their starting position.
  • the low-pressure storage chamber 20, which has a minimum operating pressure, ejects any pressure medium contained therein, so that it can automatically flow back to the master brake cylinder 3 by overcoming the check valve 23 through the suction line 27 and the second shut-off valve 28 which assumes its passage position 28a.
  • the backflow of the pressure medium is supported by the relatively large flow cross section of the second shut-off valve 28. Besides, is this reduces the throttling action of the second shut-off valve 28, which has an advantageous effect when pressure medium is drawn in from the master brake cylinder 3 in traction control mode at low temperatures if the viscosity of the pressure medium is increased.
  • the electronic control unit 35 triggers a test sequence of the anti-lock and traction control device 34 at certain time intervals.
  • the high-pressure pump 22 is put into operation and pressure medium is sucked out of the master brake cylinder 3 through the suction line 27.
  • the pressure medium conveyed into the brake line 10 flows out through the first shut-off valve 12 which assumes its passage position 12a and is pumped 22 through the suction line
  • the effects of the second shut-off valve 28 can be achieved if it has an electromagnetic actuation of the blocking position 28b instead of the hydraulic actuation.
  • the advantageous effects of the solution according to the invention can also be achieved in a brake system with K-brake circuit division.
  • K division the wheel brakes of diagonally opposite vehicle wheels are contained in a brake circuit.
  • the wheel brakes 4, 6 can be assigned to the driven front wheels, the wheel brakes 5, 7 to the non-driven rear wheels of the vehicle.
  • brake line 11 is then the main connected to the brake line 10, z. B. by connecting to the section of the suction line 27 running between the second shut-off valve 28 and the master brake cylinder 3.
  • the brake circuit I is then equipped with a self-priming high-pressure pump 22, a first shut-off valve 12, a check valve 23, and a second shut-off valve 28 , an overflow line 30 and a pressure relief valve 31.

Landscapes

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

Abstract

Il s'agit de simplifier le dispositif de freinage (1) et d'en améliorer le fonctionnement. Le dispositif de freinage hydraulique (1) présente au moins un système de soupapes (p. ex. 13) pour la modulation de la pression de freinage dans un frein de roue (p. ex. 6). En outre il est prévu une pompe à haute pression (22) pour le retour du liquide sous pression depuis le frein de roue (p. ex. 6) dans un maître-cylindre de freinage (3) lors du fonctionnement en mode antiblocage, ou bien pour amener du liquide sous pression depuis le maître-cylindre (3) à un frein de roue (p. ex. 6) lors du fonctionnement en mode antipatinage à l'accélération. En amont de la pompe à haute pression (22) est disposée du côté aspiration une soupape d'arrêt (28) avec une position de passage actionnée par ressort (28a) et avec une position de blocage (28b) déclenchée par la pression côté maître-cylindre de freinage. Ce dispositif de freinage hydraulique (1) avec système d'antiblocage et d'antipatinage à l'accélération (34) est utilisable en particulier dans les véhicules automobiles.
EP92910375A 1991-06-29 1992-06-02 Dispositif de freinage hydraulique avec systeme d'antiblocage et d'antipatinage a l'acceleration, en particulier pour vehicules automobiles Withdrawn EP0591237A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4121604 1991-06-29
DE4121604A DE4121604A1 (de) 1991-06-29 1991-06-29 Hydraulische bremsanlage mit blockierschutz- und antriebsschlupfregeleinrichtung, insbesondere fuer kraftfahrzeuge
PCT/DE1992/000442 WO1993000239A1 (fr) 1991-06-29 1992-06-02 Dispositif de freinage hydraulique avec systeme d'antiblocage et d'antipatinage a l'acceleration, en particulier pour vehicules automobiles

Publications (1)

Publication Number Publication Date
EP0591237A1 true EP0591237A1 (fr) 1994-04-13

Family

ID=6435082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910375A Withdrawn EP0591237A1 (fr) 1991-06-29 1992-06-02 Dispositif de freinage hydraulique avec systeme d'antiblocage et d'antipatinage a l'acceleration, en particulier pour vehicules automobiles

Country Status (6)

Country Link
US (1) US5390994A (fr)
EP (1) EP0591237A1 (fr)
JP (1) JPH06508579A (fr)
KR (1) KR940701346A (fr)
DE (1) DE4121604A1 (fr)
WO (1) WO1993000239A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4319161A1 (de) * 1993-06-09 1994-12-15 Teves Gmbh Alfred Schlupfgeregelte hydraulische Bremsanlage
DE4409911A1 (de) * 1994-03-23 1995-09-28 Teves Gmbh Alfred Hydraulische Bremsanlage mit Bremsschlupf- und Antriebsschlupfregelung
DE4434960A1 (de) * 1994-09-30 1996-04-04 Teves Gmbh Alfred Hydraulische Bremsanlage und Verfahren zur Druckregelung
WO1997043152A2 (fr) * 1996-05-14 1997-11-20 Robert Bosch Gmbh Systeme de freinage hydraulique pour vehicule
JP3564516B2 (ja) * 1996-09-04 2004-09-15 アイシン精機株式会社 機械操作用流体圧を発生する往復動ポンプ
DE19712889A1 (de) * 1997-03-27 1998-10-01 Bosch Gmbh Robert Verfahren und Vorrichtung zur Ermittlung einer den Systemdruck in einem Bremskreis beschreibenden Größe
WO2006041925A1 (fr) 2004-10-04 2006-04-20 Kelsey-Hayes Company Soupape d'alimentation a pression equilibree pour systeme de frein de vehicule a accumulateur basse pression integre

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3816073C2 (de) * 1988-05-11 1997-04-24 Bosch Gmbh Robert Blockierschutz- und Antriebsschlupfregelanlage
DE4001421A1 (de) * 1990-01-19 1991-07-25 Teves Gmbh Alfred Schlupfgeregelte, hydraulische bremsanlage
DE4017872A1 (de) * 1990-06-02 1991-12-05 Bosch Gmbh Robert Hydraulische fahrzeugbremsanlage mit antiblockiersystem und antriebsschlupfregelung
DE4021454A1 (de) * 1990-07-05 1992-01-16 Bosch Gmbh Robert Hydraulische bremsanlage
DE4034112A1 (de) * 1990-10-26 1992-04-30 Bosch Gmbh Robert Blockiergeschuetzte hydraulische mehrkreis-bremsanlage, insbesondere fuer kraftfahrzeuge
DE4034113A1 (de) * 1990-10-26 1992-04-30 Bosch Gmbh Robert Hydraulische mehrkreis-bremsanlage, insbesondere fuer kraftfahrzeuge
DE4112759A1 (de) * 1991-04-19 1992-10-22 Bosch Gmbh Robert Bremsdruckregelanlage
DE4118719C2 (de) * 1991-06-07 2000-12-28 Bosch Gmbh Robert Hydraulische Mehrkreis-Bremsanlage für Kraftfahrzeuge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9300239A1 *

Also Published As

Publication number Publication date
KR940701346A (ko) 1994-05-28
DE4121604A1 (de) 1993-01-07
US5390994A (en) 1995-02-21
JPH06508579A (ja) 1994-09-29
WO1993000239A1 (fr) 1993-01-07

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