JPS529275B2 - - Google Patents
Info
- Publication number
- JPS529275B2 JPS529275B2 JP47113765A JP11376572A JPS529275B2 JP S529275 B2 JPS529275 B2 JP S529275B2 JP 47113765 A JP47113765 A JP 47113765A JP 11376572 A JP11376572 A JP 11376572A JP S529275 B2 JPS529275 B2 JP S529275B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- housing
- chamber
- chambers
- 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.)
- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/26—Compressed-air systems
- B60T13/40—Compressed-air systems indirect, i.e. compressed air booster units indirect 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
- B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4004—Repositioning the piston(s) of the brake control means by means of a fluid pressurising means in order to reduce the brake pressure
- B60T8/4009—Repositioning the piston(s) of the brake control means by means of a fluid pressurising means in order to reduce the brake pressure the brake control means being the wheel cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Safety Valves (AREA)
- Actuator (AREA)
- Braking Arrangements (AREA)
- Fluid-Driven Valves (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
1415299 Fluid pressure brakes GIRLING Ltd 1 Nov 1972 [13 Nov 1971 21 Jan 1972] 52798/71 and 2881/72 Heading F2F [Also in Division G3] A pneumatic actuator for a vehicle brake system comprises a wall 11 movable in a housing 21 in response to differential fluid pressures applied to chambers 9, 10 in the housing on opposite sides of the wall, an actuating member 12 attached to the wall and adapted to actuate a component of the braking system and a valve 16 located in the housing for establishing communication through the wall to equalize the pressure in both chambers. The valve has a valve seat and a valve member comprising a flexible diaphragm 49 adapted to co-operate with the valve seat and operable directly by fluid pressure, and a fluid pressure connection extending from the valve to the exterior of the housing to enable the valve member to be remotely operated by fluid pressure. As shown in Figs. 5 and 6, the normally closed valve 16 and actuating member 12 are secured to the backing plate 30 of a flexible diaphragm 11 and a normally open second valve 17, also remotely operable, controls a connection 50 leading from the low pressure chamber 10 to the exterior of the actuator housing 21. The high pressure chamber 9 of the actuator is connected directly to a supply 13 of pressurized air which is also connected directly to the chamber 10 through a relay valve 14 controlled by a treadle valve 15. The latter, when the brakes are applied operates the valve 14 to cut off the air supply to the chamber 10 and then connect this chamber exhaust, the differential pressure established across the diaphragm 11 moving the diaphragm and member 12 to actuate a brake. The valve 14 balances the pressures in the chambers 9, 10 with the treadle valve pressure so that a driver has a "feel" of the brake. When a signal from skid sensing means 19 is received by the solenoid control valve assembly 18, the latter operates to close the valve 17 to isolate the chamber 10 from exhaust and open the valve 16 to equalize the pressures in the chambers 9, 10 and to move the diaphragm 11 and member 12 to the left, as seen in Fig. 5, whereby the braking effort is reduced. When the valve assembly 18 reverts, the valve 17 again opens and the valve 16 closes, re-applying the brakes. In modifications, (a) the actuator incorporates a third valve (73), Fig. 12 (not shown) which, in the normal state of the actuator, is, together with the valve 17, closed, the valve 16 being open, and when the solenoid control valve assembly receives a signal from the skid sensing means 19, the valve 16 is connected to exhaust and the control ports of the valves 17, 73 are pressurized to become closed, the chamber 10 being isolated from atmosphere, and the chamber 9 being isolated from the air supply 13 whereby the pressure is equalized in the chambers, and. (b) the valve 17 is dispensed with, there being a flow restrictor (76), Fig. 14 (not shown), in the actuator casing. The construction of the valves, in which the ratio of the total peripheral length of the valve seat to the maximum unsupported span S of the diaphragm is greater than 10, may take various forms wherein (a) the valve is basically flat and constructed from a two-part housing 1, Figs. 1 and 2, between which is clamped a flexible diaphragm valve member 2, the housing part 3 being the valve seating member and having a raised, continuous, convoluted rib 4 dividing the housing into inlet and outlet spaces A, B, a pilot pressure applied to the space 5 closing the valve; the ratio of the length of seat separating inlet spaces from outlet spaces to the unsupported span S is 100, (b) the ribs (7) Figs. 3 and 4 (not shown), are circular in form and increase in height to vary the outlet flow from the valve (c) the seating member is slotted, (d) two annular housing parts 41, Figs. 6 and 7, are secured together by an encircling band 42 each part being grooved to form an annular passage 43 which is divided into three annular chambers 51, 53, 55 by an annular seating member 44 around which is flexible diaphragm 49; inlet ports 51 lead to the inlet chamber 51, and outlet and radial control ports 52 and 54 lead to chambers 53 and 55 respectively, and (e) the valve housing 60, Fig. 9, is frusto-conical in form and located therein is an annular seating member 63 the outer surface of which is frusto-conical.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5279871 | 1971-11-13 | ||
GB288172A GB1415299A (en) | 1971-11-13 | 1972-01-21 | Actuator for a vehicle braking system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS4855424A JPS4855424A (en) | 1973-08-03 |
JPS529275B2 true JPS529275B2 (en) | 1977-03-15 |
Family
ID=26237812
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP47113765A Expired JPS529275B2 (en) | 1971-11-13 | 1972-11-13 |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS529275B2 (en) |
DD (1) | DD107124A1 (en) |
DE (1) | DE2255192C3 (en) |
FR (1) | FR2160222A5 (en) |
GB (1) | GB1415299A (en) |
HU (1) | HU173330B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5528198Y2 (en) * | 1976-03-19 | 1980-07-05 | ||
JPS61164642U (en) * | 1985-03-29 | 1986-10-13 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS597637Y2 (en) * | 1977-08-17 | 1984-03-08 | 日野自動車株式会社 | brake chamber |
US4212501A (en) * | 1978-06-28 | 1980-07-15 | Honda Giken Kogyo Kabushiki Kaisha | Vehicular anti-skid brake device |
FR2476574A1 (en) * | 1980-02-22 | 1981-08-28 | Dba | BRAKE ASSIST SERVOMOTOR WITH LOW STRUCTURE |
DE3315176A1 (en) * | 1983-04-27 | 1984-10-31 | Knorr-Bremse GmbH, 8000 München | COMPRESSED AIR CYLINDER, ESPECIALLY COMPRESSED AIR BRAKE CYLINDER |
DE3315174A1 (en) * | 1983-04-27 | 1984-10-31 | Knorr-Bremse GmbH, 8000 München | COMPRESSED AIR CYLINDER, ESPECIALLY COMPRESSED AIR BRAKE CYLINDER FOR MOTOR VEHICLES |
EP0826633B1 (en) | 1996-08-30 | 2002-03-13 | Showa Denko Kabushiki Kaisha | Particles, aqueous dispersion and film of titanium oxide, and preparation thereof |
CN110410437B (en) * | 2019-07-22 | 2024-02-06 | 嘉兴盛鼎机械有限公司 | Brake chamber with balanced valve structure |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2520374A (en) * | 1944-06-09 | 1950-08-29 | Edward A Rockwell | Fluid operated pressure intensifier |
US2622620A (en) * | 1946-06-21 | 1952-12-23 | Grove Regulator Company | Fluid pressure controlled flexible tube valve |
GB880074A (en) * | 1959-02-27 | 1961-10-18 | Vickers Res Ltd | Improvements in or relating to fluid control valves |
GB1101582A (en) * | 1963-11-16 | 1968-01-31 | Ferguson Res Ltd Harry | Improvements in or relating to vehicle braking systems |
US3312509A (en) * | 1965-08-13 | 1967-04-04 | Gen Motors Corp | Anti-skid brake pressure modulator |
-
1972
- 1972-01-21 GB GB288172A patent/GB1415299A/en not_active Expired
- 1972-11-08 HU HU72GI185A patent/HU173330B/en unknown
- 1972-11-10 DE DE19722255192 patent/DE2255192C3/en not_active Expired
- 1972-11-13 FR FR7240165A patent/FR2160222A5/fr not_active Expired
- 1972-11-13 DD DD16641772A patent/DD107124A1/xx unknown
- 1972-11-13 JP JP47113765A patent/JPS529275B2/ja not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5528198Y2 (en) * | 1976-03-19 | 1980-07-05 | ||
JPS61164642U (en) * | 1985-03-29 | 1986-10-13 |
Also Published As
Publication number | Publication date |
---|---|
DE2255192A1 (en) | 1973-05-24 |
JPS4855424A (en) | 1973-08-03 |
GB1415299A (en) | 1975-11-26 |
HU173330B (en) | 1979-04-28 |
DE2255192C3 (en) | 1981-04-30 |
FR2160222A5 (en) | 1973-06-22 |
DE2255192B2 (en) | 1980-07-31 |
DD107124A1 (en) | 1974-07-12 |
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