GB2018921A - A hydraulic pressure control device for use in a vehicle split circuit brake system - Google Patents

A hydraulic pressure control device for use in a vehicle split circuit brake system

Info

Publication number
GB2018921A
GB2018921A GB7842018A GB7842018A GB2018921A GB 2018921 A GB2018921 A GB 2018921A GB 7842018 A GB7842018 A GB 7842018A GB 7842018 A GB7842018 A GB 7842018A GB 2018921 A GB2018921 A GB 2018921A
Authority
GB
United Kingdom
Prior art keywords
rear wheel
valve
braking
piston
hydraulic pressure
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.)
Granted
Application number
GB7842018A
Other versions
GB2018921B (en
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of GB2018921A publication Critical patent/GB2018921A/en
Application granted granted Critical
Publication of GB2018921B publication Critical patent/GB2018921B/en
Expired 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
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/28—Valves specially adapted therefor
    • B60T11/34—Pressure reducing or limiting valves

Abstract

A hydraulic pressure control device 100 for a vehicle braking system with a pair of mutually independent circuits for supplying respective rear wheel brake cylinders is provided with a proportioning valve 20 for controlling the braking hydraulic pressure in a first rear wheel cylinder 5L out of the right- and left rear wheel cylinders of the vehicle and a shut-off valve 52 for shutting off the braking fluid passage to a second rear wheel cylinder 5R. A balance piston 41 is disposed in series between the controlling piston 21 of the proportioning valve and the valve poppet of the shut-off valve 52 which balance piston is subject on one end surface thereof to the fluid pressure to the first rear wheel cylinder and on the other end surface thereof to the fluid pressure to the second rear wheel cylinder, a pressure differential between the two actuating the shut-off valve for equalizing the braking fluid pressures in the two rear wheel cylinders. Should a failure or leak occur in either circuit a lock piston 61 will be displaced from the position shown so one of the enlarged portions will prevent leftward movement of the control piston 22 so preventing closure of either valve 20 or 52 to prevent reduction of rear braking pressure. <IMAGE>
GB7842018A 1978-04-18 1978-10-26 Hydraulic pressure control device for use in a vehicle split circuit brake system Expired GB2018921B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4570078A JPS54138238A (en) 1978-04-18 1978-04-18 Liquid pressure control device for dual-system brake device for vehicle

Publications (2)

Publication Number Publication Date
GB2018921A true GB2018921A (en) 1979-10-24
GB2018921B GB2018921B (en) 1982-06-16

Family

ID=12726643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7842018A Expired GB2018921B (en) 1978-04-18 1978-10-26 Hydraulic pressure control device for use in a vehicle split circuit brake system

Country Status (4)

Country Link
JP (1) JPS54138238A (en)
DE (1) DE2846724C2 (en)
FR (1) FR2423385B1 (en)
GB (1) GB2018921B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346941A (en) * 1979-08-30 1982-08-31 Nissin Kogyo Kabushiki Kaisha Hydraulic pressure control valve device of hydraulic brake system for vehicles
EP0498131A1 (en) * 1991-02-07 1992-08-12 Alliedsignal Europe Services Techniques Brake pressure corrector for motor vehicles
WO1994011225A1 (en) * 1992-11-06 1994-05-26 Itt Automotive Europe Gmbh Hydraulic pressure relief valve
CN1332839C (en) * 2005-08-02 2007-08-22 浙江亚太机电股份有限公司 Single chamber failure protection apparatus of double chamber proportioning valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664539B1 (en) * 1990-07-11 1994-07-08 Valeo AIR PULSE DEVICE FOR A HEATING-VENTILATION SYSTEM OF A MOTOR VEHICLE.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1226300A (en) * 1968-12-19 1971-03-24 Ford Motor Co A warning device for indicating a pressure differential, for example, for hydraulic braking systems
JPS5142701B1 (en) * 1969-10-02 1976-11-17
US3804468A (en) * 1969-10-02 1974-04-16 Toyota Motor Co Ltd Dual hydraulic braking system
DE2402291C3 (en) * 1972-07-24 1980-02-28 Alfred Teves Gmbh, 6000 Frankfurt Brake force regulator for a multi-circuit brake system
GB1478136A (en) * 1973-06-08 1977-06-29 Automotive Prod Co Ltd Valve assemblies for use in fluid pressure braking systems and to fluid pressure braking systems including such valve assemblies
GB1444397A (en) * 1973-07-16 1976-07-28 Girling Ltd Fluid pressure control valve
US3832007A (en) * 1973-07-17 1974-08-27 Weatherhead Co Blend back proportioning valve
DE2445068A1 (en) * 1973-09-20 1975-05-15 Girling Ltd Pressure controller for vehicle brake system - has pressure control valve with inner section and operating piston
FR2258293B1 (en) * 1974-01-18 1979-09-28 Teves Gmbh Alfred
JPS5526021B2 (en) * 1974-05-02 1980-07-10

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346941A (en) * 1979-08-30 1982-08-31 Nissin Kogyo Kabushiki Kaisha Hydraulic pressure control valve device of hydraulic brake system for vehicles
EP0498131A1 (en) * 1991-02-07 1992-08-12 Alliedsignal Europe Services Techniques Brake pressure corrector for motor vehicles
FR2672558A1 (en) * 1991-02-07 1992-08-14 Bendix Europ Services Tech BRAKE COMPENSATOR FOR MOTOR VEHICLE.
US5186523A (en) * 1991-02-07 1993-02-16 Bendix Europe Services Techniques Brake compensator for a motor vehicle
WO1994011225A1 (en) * 1992-11-06 1994-05-26 Itt Automotive Europe Gmbh Hydraulic pressure relief valve
US5522422A (en) * 1992-11-06 1996-06-04 Itt Automotive Europe Gmbh Hydraulic pressure reducing valve
CN1332839C (en) * 2005-08-02 2007-08-22 浙江亚太机电股份有限公司 Single chamber failure protection apparatus of double chamber proportioning valve

Also Published As

Publication number Publication date
DE2846724A1 (en) 1979-10-25
GB2018921B (en) 1982-06-16
JPS54138238A (en) 1979-10-26
FR2423385B1 (en) 1986-11-21
DE2846724C2 (en) 1984-04-05
FR2423385A1 (en) 1979-11-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee