GB1530596A - Modulators for vehicle hydraulic braking systems - Google Patents

Modulators for vehicle hydraulic braking systems

Info

Publication number
GB1530596A
GB1530596A GB5455474A GB5455474A GB1530596A GB 1530596 A GB1530596 A GB 1530596A GB 5455474 A GB5455474 A GB 5455474A GB 5455474 A GB5455474 A GB 5455474A GB 1530596 A GB1530596 A GB 1530596A
Authority
GB
United Kingdom
Prior art keywords
valve
chamber
pressure
spring
exhaust passage
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
Application number
GB5455474A
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.)
Girling Ltd
Original Assignee
Girling Ltd
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 Girling Ltd filed Critical Girling Ltd
Priority to GB5455474A priority Critical patent/GB1530596A/en
Priority to US05/639,872 priority patent/US3995913A/en
Priority to BR7508275*A priority patent/BR7508275A/en
Priority to HU75GI237A priority patent/HU173199B/en
Priority to ES443575A priority patent/ES443575A1/en
Priority to JP50150491A priority patent/JPS5185083A/en
Priority to CS758643A priority patent/CS219868B2/en
Priority to FR7538665A priority patent/FR2294892A1/en
Priority to IT30391/75A priority patent/IT1051093B/en
Priority to DE2556923A priority patent/DE2556923C2/en
Publication of GB1530596A publication Critical patent/GB1530596A/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
    • 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
    • B60T13/44—Compressed-air systems indirect, i.e. compressed air booster units indirect systems with two-chamber booster units
    • 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
    • B60T8/4208—Debooster systems
    • B60T8/4225—Debooster systems having a fluid actuated expansion unit
    • B60T8/4241—Debooster systems having a fluid actuated expansion unit pneumatically

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)

Abstract

1530596 Vehicle brake modulators; valves GIRLING Ltd 27 Nov 1975 [17 Dec 1974 24 April 1975] 54554/74 and 17105/75 Headings F2F and F2V A brake modulator has a chamber 7 connected to a master cylinder and a slave cylinder, and an expander piston 3 retractable by a spring 9 to increase the volume of the chamber 7 and close a valve 10 between the master cylinder and the slave cylinder. The piston 3 is controlled pneumatically in response to a signal from deceleration sensing means by a first valve 14 connected through inlet 20 to a source of pneumatic pressure, and a second valve 15 downstream of the valve 14 for controlling communication between the chamber 8 and an exhaust passage 21, the valve 15 consisting of a diaphragm 32 movable between seatings 23, 24 in response to pressure in the chamber 17. The arrangement is such that when the signal is inoperative the first valve 14 is open and the second valve 15 is held closed to isolate chamber 8 from the exhaust passage and when the signal is operative the first valve 14 isolates the inlet passage from the supply chamber 17 and reduces the pressure therein so that the second valve can open, the first valve being substantially smaller than the second whereby the pressure in the modulator chamber 8 can be reduced rapidly in response to a relatively small reduction of the pressure in the supply chamber. In a modified construction (Fig. 3) the seating 19 of valve 14 comprises an annulus surrounding an opening 32 in the centre of valve member 22 of valve 15 so that exhaust passage 21 can be eliminated by using exhaust passage 28 of valve 15. In a further modification (Fig. 4) a safety device has a casing containing a diaphragm 33 backed by a plate 35 and urged by a spring 39 stronger than the spring of the modulator pneumatic unit so that if pressure fails member 1 is advanced by a rod 36 under the influence of spring 39 to open valve 10 and allow normal braking.
GB5455474A 1974-12-17 1974-12-17 Modulators for vehicle hydraulic braking systems Expired GB1530596A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB5455474A GB1530596A (en) 1974-12-17 1974-12-17 Modulators for vehicle hydraulic braking systems
US05/639,872 US3995913A (en) 1974-12-17 1975-12-11 Actuator assemblies for vehicle hydraulic braking systems
BR7508275*A BR7508275A (en) 1974-12-17 1975-12-15 IMPROVEMENT IN ACTUATOR ASSEMBLY WITH PNEUMATIC ACTIVATION, FOR A HYDRAULIC BRAKING SYSTEM
HU75GI237A HU173199B (en) 1974-12-17 1975-12-16 Actuating section of hydraulic brake system of vehicles
ES443575A ES443575A1 (en) 1974-12-17 1975-12-17 Actuator assemblies for vehicle hydraulic braking systems
JP50150491A JPS5185083A (en) 1974-12-17 1975-12-17 Norimonobureekisochoakuchueetakumitatetai
CS758643A CS219868B2 (en) 1974-12-17 1975-12-17 Control device of hydraulic braking system
FR7538665A FR2294892A1 (en) 1974-12-17 1975-12-17 IMPROVEMENTS TO ACTUATOR ASSEMBLIES FOR VEHICLE HYDRAULIC BRAKING SYSTEMS
IT30391/75A IT1051093B (en) 1974-12-17 1975-12-17 IMPROVEMENTS TO AZIO NATORI COMPLEXES FOR HYDRAULIC BRAKING SYSTEMS IN VEHICLES
DE2556923A DE2556923C2 (en) 1974-12-17 1975-12-17 Control valve for an anti-lock hydraulic brake system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5455474A GB1530596A (en) 1974-12-17 1974-12-17 Modulators for vehicle hydraulic braking systems

Publications (1)

Publication Number Publication Date
GB1530596A true GB1530596A (en) 1978-11-01

Family

ID=10471396

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5455474A Expired GB1530596A (en) 1974-12-17 1974-12-17 Modulators for vehicle hydraulic braking systems

Country Status (1)

Country Link
GB (1) GB1530596A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee