GB1374693A - Compressed air vehicle braking systems - Google Patents
Compressed air vehicle braking systemsInfo
- Publication number
- GB1374693A GB1374693A GB459172A GB459172A GB1374693A GB 1374693 A GB1374693 A GB 1374693A GB 459172 A GB459172 A GB 459172A GB 459172 A GB459172 A GB 459172A GB 1374693 A GB1374693 A GB 1374693A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- pressure chamber
- pressure
- compressed air
- braking
- 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.)
- Expired
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
- B60T8/18—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 vehicle weight or load, e.g. load distribution
- B60T8/1812—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 vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction
-
- 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
- B60T8/18—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 vehicle weight or load, e.g. load distribution
- B60T8/1812—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 vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction
- B60T8/1825—Means for changing the diaphragm area submitted to pressure
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
1374693 Load and deceleration control of braking ROBERT BOSCH GmbH 1 Feb 1972 [2 Feb 1971] 4591/72 Heading F2F A compressed air vehicle braking system has a braking force regulating valve, connected in a compressed air supply line 29 to a brake cylinder pressure chamber 30 and having a member 10 displaced by vehicle load variation to limit pressure for the brake cylinder, and at least one wheel deceleration sensor to reduce braking pressure by connecting a counter pressure chamber 31 in the brake cylinder 30 to a source of compressed air, the counter pressure chamber being vented to atmosphere through a valve controlled by the member 10 when the deceleration sensor is not actuated. Vehicle suspension deflections and wheel rotation values are transmitted to a computer 4 from sensors 2, 2<SP>1</SP> and 3, 3<SP>1</SP> respectively, the computer supplying a signal to a spring biased electromagnet 9 to move the member 10 in the form of a frusto-conical sleeve, in turn actuating sleeves 15, 18 acting as closure members. Anti-skid actuation causes rapid movement of sleeve 15 to allow pressurized air to pass from the pressure chamber 30<SP>1</SP> via the 29, chambers 27, 35 and line 32 to the counter pressure chamber 31 to equalize pressures to retract the brakes. Load sensing causes slower electromagnet movement, decreasing load causing leftward movement of sleeve 10, and upward movement of the sleeve 18. Pressure fluid in chamber 27 acts on a diaphragm 22 with a series of rings 23 and a sleeve 21, causing the diaphragm to move down so that a neck 20 in the sleeve 21 engages a part 19 of the sleeve 18. The effective area of the diaphragm 22 decreases with downward movement due to successive rings 23 abutting the valve casing 12, and thus the pressure required to engage the neck 20 and the part 19 increases with such downward movement. Therefore, for decreasing load values, the valve closing pressure decreases, thus decreasing the braking pressure from the cylinder 30. During non-actuation of the anti-skid sensors 3, 3<SP>1</SP>, the counter pressure chamber 31 is vented to atmosphere through line 32, chamber 35, passages 36, 37, 38, 39, past a closure member 43 actuated by the sleeve 10, and through an exhaust passage 41.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712104646 DE2104646A1 (en) | 1971-02-02 | 1971-02-02 | Braking force control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1374693A true GB1374693A (en) | 1974-11-20 |
Family
ID=5797531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB459172A Expired GB1374693A (en) | 1971-02-02 | 1972-02-01 | Compressed air vehicle braking systems |
Country Status (6)
| Country | Link |
|---|---|
| CH (1) | CH529642A (en) |
| DE (1) | DE2104646A1 (en) |
| FR (1) | FR2124405B1 (en) |
| GB (1) | GB1374693A (en) |
| IT (1) | IT947093B (en) |
| SE (1) | SE372742B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104648370A (en) * | 2014-12-16 | 2015-05-27 | 齐齐哈尔轨道交通装备有限责任公司 | Empty and heavy vehicle adjustment valve for vehicle air braking system |
| CN106864439A (en) * | 2017-04-18 | 2017-06-20 | 绍兴友润机电有限公司 | A kind of piston type cam adjustment controls the automatic load sensing valve of automobile braking force |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1541218A (en) * | 1975-06-03 | 1979-02-28 | Bendix Westinghouse Ltd | Load dependent control arrangements |
| DE2638190C2 (en) * | 1976-08-25 | 1986-04-10 | Alfred Teves Gmbh, 6000 Frankfurt | Pressure control unit for hydraulic vehicle brake systems |
| DE2849879C2 (en) * | 1978-11-17 | 1985-03-14 | Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover | Load-dependent control of brake force regulators |
| DE3209248C2 (en) * | 1982-03-13 | 1987-11-12 | Graubremse Gmbh, 6900 Heidelberg | Load-dependent brake force regulator for commercial vehicles |
| US4714299A (en) * | 1983-05-10 | 1987-12-22 | Sumitomo Electric Industries, Limited | Brake pressure control system |
| DE3330483A1 (en) * | 1983-08-24 | 1985-03-07 | Alfred Teves Gmbh, 6000 Frankfurt | BRAKE SLIP-CONTROLLED BRAKE SYSTEM FOR MOTOR VEHICLES |
| DE3525835A1 (en) * | 1985-07-19 | 1987-01-29 | Graubremse Gmbh | A device exposed or exposable to the movements between vehicle body and vehicle axle on motor vehicles |
| DE3920290A1 (en) * | 1988-12-03 | 1990-06-07 | Wabco Westinghouse Fahrzeug | DEVICE FOR OBTAINING AN AXLE LOAD SIGNAL |
| DE3920289A1 (en) * | 1989-06-21 | 1991-01-10 | Wabco Westinghouse Fahrzeug | DEVICE FOR OBTAINING AN AXLE LOAD SIGNAL ON A LIFT AXLE UNIT |
| DE19629975C1 (en) * | 1996-07-25 | 1997-10-09 | Grau Gmbh | Air-brake system for commercial vehicle with air suspension |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1326434A (en) * | 1962-03-14 | 1963-05-10 | Dba Sa | Brake distributor |
| FR2051986A5 (en) * | 1969-07-03 | 1971-04-09 | Dba Sa | Non-slip pneumatic brake system |
-
1971
- 1971-02-02 DE DE19712104646 patent/DE2104646A1/en active Pending
- 1971-12-16 CH CH1834971A patent/CH529642A/en not_active IP Right Cessation
-
1972
- 1972-01-28 IT IT1994472A patent/IT947093B/en active
- 1972-02-01 SE SE113772A patent/SE372742B/xx unknown
- 1972-02-01 GB GB459172A patent/GB1374693A/en not_active Expired
- 1972-02-02 FR FR7203505A patent/FR2124405B1/fr not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104648370A (en) * | 2014-12-16 | 2015-05-27 | 齐齐哈尔轨道交通装备有限责任公司 | Empty and heavy vehicle adjustment valve for vehicle air braking system |
| CN104648370B (en) * | 2014-12-16 | 2017-06-06 | 中车齐齐哈尔车辆有限公司 | The empty and load brake equipment of vehicle air brake systems |
| CN106864439A (en) * | 2017-04-18 | 2017-06-20 | 绍兴友润机电有限公司 | A kind of piston type cam adjustment controls the automatic load sensing valve of automobile braking force |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2124405A1 (en) | 1972-09-22 |
| FR2124405B1 (en) | 1975-10-24 |
| IT947093B (en) | 1973-05-21 |
| CH529642A (en) | 1972-10-31 |
| DE2104646A1 (en) | 1972-08-24 |
| SE372742B (en) | 1975-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |