GB1513128A - Fluid pressure control valves - Google Patents

Fluid pressure control valves

Info

Publication number
GB1513128A
GB1513128A GB3288774A GB3288774A GB1513128A GB 1513128 A GB1513128 A GB 1513128A GB 3288774 A GB3288774 A GB 3288774A GB 3288774 A GB3288774 A GB 3288774A GB 1513128 A GB1513128 A GB 1513128A
Authority
GB
United Kingdom
Prior art keywords
pressure
master cylinder
pistons
brake
spring
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
GB3288774A
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.)
Automotive Products PLC
Original Assignee
Automotive Products PLC
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 Automotive Products PLC filed Critical Automotive Products PLC
Priority to GB3288774A priority Critical patent/GB1513128A/en
Publication of GB1513128A publication Critical patent/GB1513128A/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
    • B60T8/18—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
    • B60T8/1831—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 pressure reducing or limiting valves
    • 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
    • B60T8/30—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 responsive to load

Landscapes

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

Abstract

1513128 Pressure reducing valves for brake systems AUTOMOTIVE PRODUCTS LTD 25 July 1975 [25 July 1974] 32887/74 Heading F2F A pressure reducing hydraulic control valve assembly 19 is incorporated into a dual circuit hydraulic braking system to control communication between a tandem master cylinder 15 and front and rear brakes 12 and 14 respectively and comprises tubular components 23 and 24 forming a stepped through bore housing stepped pistons 34 and 49 associated with rear and front brake circuits respectively. An integral plunger 20 of the piston 34 engages a leaf spring 21 resiliently connected to rear axle 22 such that rear axle load variations cause variations in the spring force on plunger 20. When the pressure transmitted to the valve reaches a certain level dependent on the ratio of the effective areas of the pistons 34 and 49 the pressures in bores 25 and 31 are sufficient to separate pistons 34 and 49 against spring 74 and leaf spring 21 closing ball valves 41 and 62 which control communication between master cylinder 15 and brakes 14 and 12 respectively. Further increase in pressure transmitted from master cylinder 15 causes a pressure build up in annular spaces 45 and 66,without increase in brake pressure eventually forcing the pistons 34 and 49 together again and reopening valves 41 and 62. This separating and closing cycle is repeated as master cylinder pressure increases having the net effect that the rate of increase of brake cylinder pressure is less than that generated in the master cylinder. Alternatively a second spring may be provided to act directly on the piston 49.
GB3288774A 1975-07-25 1975-07-25 Fluid pressure control valves Expired GB1513128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3288774A GB1513128A (en) 1975-07-25 1975-07-25 Fluid pressure control valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3288774A GB1513128A (en) 1975-07-25 1975-07-25 Fluid pressure control valves

Publications (1)

Publication Number Publication Date
GB1513128A true GB1513128A (en) 1978-06-07

Family

ID=10345523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3288774A Expired GB1513128A (en) 1975-07-25 1975-07-25 Fluid pressure control valves

Country Status (1)

Country Link
GB (1) GB1513128A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397318A1 (en) * 1977-07-11 1979-02-09 Teves Gmbh Alfred BRAKING SYSTEM FOR MOTOR CYCLES
FR2404551A1 (en) * 1977-10-03 1979-04-27 Teves Gmbh Alfred BRAKE CONTROL UNIT FOR HYDRAULIC VEHICLE BRAKES
DE3343612A1 (en) * 1983-12-02 1985-06-13 Alfred Teves Gmbh, 6000 Frankfurt Brake pressure control unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397318A1 (en) * 1977-07-11 1979-02-09 Teves Gmbh Alfred BRAKING SYSTEM FOR MOTOR CYCLES
FR2404551A1 (en) * 1977-10-03 1979-04-27 Teves Gmbh Alfred BRAKE CONTROL UNIT FOR HYDRAULIC VEHICLE BRAKES
DE3343612A1 (en) * 1983-12-02 1985-06-13 Alfred Teves Gmbh, 6000 Frankfurt Brake pressure control unit

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Legal Events

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