GB1471762A - Master cylinder assemblies for vehicle hydraulic braking systems - Google Patents

Master cylinder assemblies for vehicle hydraulic braking systems

Info

Publication number
GB1471762A
GB1471762A GB644774A GB644774A GB1471762A GB 1471762 A GB1471762 A GB 1471762A GB 644774 A GB644774 A GB 644774A GB 644774 A GB644774 A GB 644774A GB 1471762 A GB1471762 A GB 1471762A
Authority
GB
United Kingdom
Prior art keywords
piston
pressure
space
pedal
valve
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
GB644774A
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 GB644774A priority Critical patent/GB1471762A/en
Priority to FR7504315A priority patent/FR2260478B1/fr
Priority to DE2505945A priority patent/DE2505945C3/en
Priority to US05/549,476 priority patent/US3991573A/en
Priority to JP50018382A priority patent/JPS50113677A/ja
Publication of GB1471762A publication Critical patent/GB1471762A/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
    • B60T8/32—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
    • B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
    • B60T8/447—Reducing the boost of the power-assist booster means to reduce brake pressure
    • 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
    • B60T13/12—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 liquid
    • 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
    • B60T13/12—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 liquid
    • B60T13/14—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 liquid using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B60T13/143—Master cylinder mechanically coupled with booster
    • B60T13/144—Pilot valve provided inside booster piston
    • 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
    • B60T8/36—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 including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
    • B60T8/3635—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems switching between more than two connections, e.g. 3/2-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
    • B60T8/32—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
    • B60T8/36—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 including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
    • B60T8/368—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders
    • 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
    • B60T8/44—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems
    • B60T8/441—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 co-operating with a power-assist booster means associated with a master cylinder for controlling the release and reapplication of brake pressure through an interaction with the power assist device, i.e. open systems using hydraulic boosters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

1471762 Anti-skid hydraulic brake boosters GIRLING Ltd 28 Jan 1975 [13 Feb 1974 4 June 1974 30 Nov 1974] 06447/74 24597/74 and 51962/74 Heading F2F In a master cylinder assembly comprising a pedal-operated value assembly 34, 36, for controlling a supply of pressure fluid (in chamber 28) to a power chamber 13 on the opposite side of a first piston 5/59 to a pressure space 17 with an outlet 18 to a wheel brake, a second piston 16, operating in the opposite direction to the 1st piston is provided actuatable by the pedal to generate fluid pressure in the space 17. The second piston 16 is normally inoperative due to the clearance between a shoulder 26 on the piston and a plate 24 actuated by the pedal, but should the pressure fluid supply fail the brakes can be applied without the seal drag normally present from the booster means. Preferably the boost pressure is supplied to a plurality of respective pressure spaces 17 for individual front wheels and the rear wheels and the pivotally mounted equalizing plate 24 actuates respective second cylinders for the front wheels at least. In operation on initial pedal movement of rod 3 a valve member 34 closes bore 35 leading through passage 37 to a fluid reservoir. On further movement an extension of the member 34 lifts a ball 36 from its seat to connect the pressure chamber 28 through passage 43, antiskid valve 50, and inlet 19 to the left hand end of piston 5 and the space 13. This moves the pistons 5 and 59 (which may be integral) to close the recuperation valve 21 and pressurize the space 17 and hence a brake actuator. The solenoid operated anti-skid valve 50 is responsive to deceleration of the corresponding braked wheel to move the valve ball 53 to close the space 13 from the pressure supply passage 43, and connect it to a reservoir to de-energize the brake. In a modification (Fig. 3) pressure fluid is supplied to a chamber 46 of larger effective area than the space 13 on sufficient deceleration to move the first piston 5 to the left to relieve the braking pressure. In further modifications (Figs. 6 and 7, not shown) the second piston has longitudinal bores (75), (76) leading to ports 18, 20 connected by flexible pipes to a brake actuator and a reservoir respectively and (Fig. 11, not shown) the second piston 16 is hollow and has a head at its right hand end incorporating a recuperation valve (21) and ports 18, 20 connected again to flexible pipes. In Fig. 7 the pressure chamber (13) is constituted by a stepped piston (64) mounted around the piston (5) and abutting a shoulder thereof. To provide feel a rubber spring 97 (Fig. 13) may be enclosed within telescopic members between the pedal rod 95 and an equalizing plate 82.
GB644774A 1974-02-13 1974-02-13 Master cylinder assemblies for vehicle hydraulic braking systems Expired GB1471762A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB644774A GB1471762A (en) 1974-02-13 1974-02-13 Master cylinder assemblies for vehicle hydraulic braking systems
FR7504315A FR2260478B1 (en) 1974-02-13 1975-02-12
DE2505945A DE2505945C3 (en) 1974-02-13 1975-02-13 Master cylinder arrangement for a hydraulic vehicle brake system
US05/549,476 US3991573A (en) 1974-02-13 1975-02-13 Master cylinder assemblies for vehicle hydraulic braking systems
JP50018382A JPS50113677A (en) 1974-02-13 1975-02-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB644774A GB1471762A (en) 1974-02-13 1974-02-13 Master cylinder assemblies for vehicle hydraulic braking systems

Publications (1)

Publication Number Publication Date
GB1471762A true GB1471762A (en) 1977-04-27

Family

ID=9814656

Family Applications (1)

Application Number Title Priority Date Filing Date
GB644774A Expired GB1471762A (en) 1974-02-13 1974-02-13 Master cylinder assemblies for vehicle hydraulic braking systems

Country Status (1)

Country Link
GB (1) GB1471762A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3325424A1 (en) * 1983-07-14 1985-01-24 Alfred Teves Gmbh, 6000 Frankfurt ACTUATING DEVICE FOR A HYDRAULIC MOTOR VEHICLE BRAKE SYSTEM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3325424A1 (en) * 1983-07-14 1985-01-24 Alfred Teves Gmbh, 6000 Frankfurt ACTUATING DEVICE FOR A HYDRAULIC MOTOR VEHICLE BRAKE SYSTEM

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Legal Events

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