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EP0472523A1 - Systeme de freinage - Google Patents

Systeme de freinage

Info

Publication number
EP0472523A1
EP0472523A1 EP90901555A EP90901555A EP0472523A1 EP 0472523 A1 EP0472523 A1 EP 0472523A1 EP 90901555 A EP90901555 A EP 90901555A EP 90901555 A EP90901555 A EP 90901555A EP 0472523 A1 EP0472523 A1 EP 0472523A1
Authority
EP
European Patent Office
Prior art keywords
valve
brake
line
solenoid valve
pump
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Withdrawn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
EP90901555A
Other languages
German (de)
English (en)
Inventor
Robert Mergenthaler
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 EP0472523A1 publication Critical patent/EP0472523A1/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Withdrawn legal-status Critical Current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
    • B60T8/343—Systems characterised by their lay-out
    • B60T8/344—Hydraulic systems
    • B60T8/348—4 Channel 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
    • B60T8/42—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition having expanding chambers for controlling pressure, i.e. closed systems
    • B60T8/4275—Pump-back systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/44—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
    • 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
    • B60T8/4881—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems having priming means
    • 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
    • B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means

Definitions

  • the invention relates to a brake system with a master brake cylinder, two brake circuits and an anti-lock and traction control system according to the preamble of the main claim.
  • Brake systems of this type with a closed anti-lock control system and a traction control system are known and are used in various embodiments. It is essential in these brake systems that the individual valves can be continuously checked for leaks, since the function of the entire brake system essentially depends on the tightness of the valves. This also applies to the valves that serve to control the traction.
  • a brake system of the embodiment described in claim 1 has the essential advantage that the valves, which have essential functions with regard to the traction control system, are also checked for leaks. This happens during normal braking.
  • At least one brake line should therefore, according to the invention, be connected to the two valves for traction control via, for example, a simple check valve. If a brake pressure is then built up, if one of the valves leaks, the brake pressure in the brake line and thus also the pedal decrease. This is a sure sign that one of the valves is leaking.
  • this check does not include the other parts of the anti-lock control or traction control system, the connection to these parts and in particular here to the corresponding storage for pressure medium and the return pump is blocked by a solenoid valve.
  • This solenoid valve is in the blocking position during normal braking operation, while it is open for filling the subsequent pressure accumulator via the precharge pump for traction control.
  • a master brake cylinder 1 has two brake chambers 3 and 4 after a brake booster part 2 which is only shown schematically. Pistons 5 and 6, respectively, slide in these brake chambers 3 and 4. The piston 5 is acted upon by a brake pressure applied to a brake pedal 8 via a piston rod 7 and transmits parts of this pressure to the piston 6 in the brake chamber 4. The transmission and also the The piston 6 is supported against a base 9 of the master brake cylinder 1 in a known manner and is only indicated schematically by the zigzag line 10. From the Bremska ⁇ uner 3 opens a brake line 11, which forms part of an I. brake circuit, via this brake line 11, two wheel brake cylinders 12 and 12a are supplied with brake fluid if a braking force is exerted on the piston 5.
  • An inlet valve 13 of an anti-lock control system is switched into the brake line 11 to the wheel brake cylinder 12.
  • This inlet valve 13 surrounds a bridge line 14, in which a check valve 15 is provided.
  • This check valve 15 is arranged such that it closes when brake pressure is applied, but permits a backflow from the wheel brake cylinder 12.
  • a precharge pump 22 is switched on, which is part of a traction control system.
  • the precharge pump 22 can also be bridged by a bypass line 23, in which a pressure relief valve 24 is located. This pressure limiting valve 24 limits the pressure generated by the precharge pump 22 and returns the outflowing volume to the reservoir 21.
  • a check valve 25 and a solenoid valve 26 are located between the precharge pump 22 and the low-pressure accumulator 19. The function of the solenoid valve 26 is explained further below.
  • the brake line 11 of the first brake circuit is also - - Connected to the wheel brake cylinder 12a via a further inlet valve 27.
  • This inlet valve 27 is also encompassed by a bypass line 28 with a check valve 29 activated. The same closes the Radbremsz cylinder 12a via an outlet valve 30 to the return line 17.
  • the inlet valve 27 also has a connecting line 31 to a return pump 32.
  • This return pump 32 works with an eccentric 33 which moves two pistons 34 and 35.
  • the piston 35 forms a working space 36, in which the connecting line 31 opens out via a check valve 37.
  • this working space 36 has a connection via a further check valve 38 to the return line 17 in front of the low-pressure accumulator 19.
  • the other piston 34 of the return pump 32 forms, together with the housing 39 of the return pump 32, a further working space 40, in which a piston return spring 41 is provided.
  • This piston return spring 41 serves to ensure that the pump receives a better filling.
  • the piston return spring is not necessarily necessary. It can only be necessary in particular if the pump 22 is missing.
  • the work space 40 has a connection via a non-return valve 42 to the solenoid valve 26, the non-return valve here being switched on in the line between the solenoid valve 26 and the low-pressure accumulator 19.
  • Brake fluid to be returned can be fed in via outlet valves 59 and 60, respectively, via a connecting line 61 between the check valve 25 and the solenoid valve 26.
  • a connecting line 61 between the check valve 25 and the solenoid valve 26 there is a direct connection to the storage container 21 via a solenoid valve 62.
  • the present brake system works as follows:
  • the wheel brake cylinders 12, 12a, 12b and 12c are supplied with brake fluid from the brake chambers 4 and 3 via the brake lines 11 and 46 and the inlet valves 13, 27, 53 and 54.
  • the switching position of the valves is as shown in the figure.
  • both the inlet valves 13, 27, 53 and 54 as well as the outlet valves 18, 30, 59 and 60 switch over to pressure reduction.
  • the return pump 32 now receives brake fluid from the wheel brake cylinders 12 and 12a through the outlet valves 18 and 30 via the check valve 38. Furthermore, the return of the brake fluid from the wheel brake cylinders 12b and 12c takes place via the outlet valves 59 and 60 by means of the return pump 32 via the check valve 42, whereby the solenoid valve 62 is closed and the solenoid valve 26 is open.
  • the returned brake fluid enters the first or second brake circuit via the check valves 37 or 44 and the connecting line 31 or line 51 and leads through the return of the
  • brake fluid is drawn from the precharge pump 22 via the check valve 25 and the opened solenoid valve 26 into the feed pump 32 via the check valve 42 and delivered via the check valve 44 to the inlet valves 53 and 54, respectively, which are switched to passage.
  • the control valve 45 is switched to the closed position.
  • the brake fluid in the traction control system is returned directly to the reservoir 21 via the solenoid valve 62.

Landscapes

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

Abstract

Dans le cas d'un système de freinage comportant un maître cylindre de frein (1), deux circuits de frein ainsi qu'un réglage antiblocage et anti-glissement d'entraînement, ces réglages sont assurés par une pompe d'alimentation (32). Cette pompe d'alimentation (32) communique avec un accumulateur (19) qui est raccordé, par l'intermédiaire d'une pompe de suralimentation (22) et d'une soupape (25), à un réservoir de stockage (21) servant à un fluide sous pression. Le retour du fluide sous pression après un réglage du glissement d'entraînement s'effectue à travers une électro-vanne (62) depuis des cylindres de freinage des roues (12b, 12c) de roues motrices directement vers le réservoir de stockage (21). La conduite entre l'électro-vanne (62) et les cylindres de frein de roue (12b, 12c) est couplée avec la conduite (61) vers la soupape (25) en aval de la pompe de suralimentation (22). Cette dernière conduite de raccordement (61) débouche entre la soupape (25) et une autre soupape (26), un autre raccordement (47) y étant prévu par l'intermédiaire d'une autre soupape (48) à l'une (46) des conduites de frein (11, 46).
EP90901555A 1989-05-20 1990-01-18 Systeme de freinage Withdrawn EP0472523A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3916489 1989-05-20
DE3916489A DE3916489A1 (de) 1989-05-20 1989-05-20 Bremsanlage

Publications (1)

Publication Number Publication Date
EP0472523A1 true EP0472523A1 (fr) 1992-03-04

Family

ID=6381066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90901555A Withdrawn EP0472523A1 (fr) 1989-05-20 1990-01-18 Systeme de freinage

Country Status (4)

Country Link
EP (1) EP0472523A1 (fr)
JP (1) JPH04505298A (fr)
DE (1) DE3916489A1 (fr)
WO (1) WO1990014258A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4009378A1 (de) * 1990-03-23 1991-09-26 Bosch Gmbh Robert Hydraulische zweikreisbremsanlage
DE4031533A1 (de) * 1990-10-05 1992-04-09 Teves Gmbh Alfred Bremsanlage mit einer einrichtung zum regeln sowohl des bremsschlupfes als auch des antriebsschlupfes
JP3051467B2 (ja) * 1991-02-20 2000-06-12 トキコ株式会社 車両ブレーキ装置
DE10033809B4 (de) * 2000-07-12 2005-10-27 Daimlerchrysler Ag Hydraulikeinheit mit Temperaturkompensation zur Verbesserung der Druckaufbaudynamik insbesondere von Fahrstabilitätssystemen in Kraftfahrzeugen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3439408C1 (de) * 1984-10-27 1986-07-17 Daimler-Benz Ag, 7000 Stuttgart Einrichtung zur Aufladung des Betriebsspeichers einer Vortriebs-Regeleinrichtung an einem Kraftfahrzeug, das auch mit einem Antiblockiersystem ausgerüstet ist
DE3633341A1 (de) * 1986-10-01 1988-04-14 Daimler Benz Ag Vortriebs-regeleinrichtung
DE3635054A1 (de) * 1986-10-15 1988-04-21 Teves Gmbh Alfred Blockiergeschuetzte bremsanlage mit antriebsschlupf-regelung
DE3839178A1 (de) * 1988-01-26 1989-08-03 Daimler Benz Ag Antiblockiersystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9014258A1 *

Also Published As

Publication number Publication date
DE3916489A1 (de) 1990-12-06
JPH04505298A (ja) 1992-09-17
WO1990014258A1 (fr) 1990-11-29

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Effective date: 19930803