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 systemInfo
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
- Regulating Braking Force (AREA)
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>
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)
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)
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)
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 |
GB1487788A (en) * | 1974-01-18 | 1977-10-05 | Teves Gmbh Alfred | Braking-force regulator for a multi-circuit brake system |
JPS5526021B2 (en) * | 1974-05-02 | 1980-07-10 |
-
1978
- 1978-04-18 JP JP4570078A patent/JPS54138238A/en active Pending
- 1978-10-26 DE DE19782846724 patent/DE2846724C2/en not_active Expired
- 1978-10-26 GB GB7842018A patent/GB2018921B/en not_active Expired
-
1979
- 1979-01-24 FR FR7901734A patent/FR2423385B1/en not_active Expired
Cited By (7)
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 |
---|---|
DE2846724C2 (en) | 1984-04-05 |
GB2018921B (en) | 1982-06-16 |
FR2423385B1 (en) | 1986-11-21 |
JPS54138238A (en) | 1979-10-26 |
DE2846724A1 (en) | 1979-10-25 |
FR2423385A1 (en) | 1979-11-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |