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GB2007787A - Anti-skid fluid-pressure operated vehicle braking system - Google Patents

Anti-skid fluid-pressure operated vehicle braking system

Info

Publication number
GB2007787A
GB2007787A GB7841509A GB7841509A GB2007787A GB 2007787 A GB2007787 A GB 2007787A GB 7841509 A GB7841509 A GB 7841509A GB 7841509 A GB7841509 A GB 7841509A GB 2007787 A GB2007787 A GB 2007787A
Authority
GB
United Kingdom
Prior art keywords
application
pressure
chamber
valve
skid
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.)
Granted
Application number
GB7841509A
Other versions
GB2007787B (en
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 GB7841509A priority Critical patent/GB2007787B/en
Publication of GB2007787A publication Critical patent/GB2007787A/en
Application granted granted Critical
Publication of GB2007787B publication Critical patent/GB2007787B/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
    • B60T8/50—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 means for controlling the rate at which pressure is reapplied to or released from the brake
    • B60T8/5056—Pressure reapplication using memory devices
    • B60T8/5062—Pressure reapplication using memory devices using memory chambers
    • B60T8/5068—Pressure reapplication using memory devices using memory chambers having decay means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

In a fluid-pressure operated anti- skid braking system operation of a brake applying relay valve 2 is controlled by application pressure in an application chamber 12. A memory chamber 25 is connected to the application chamber 12 through a one-way valve 26 and a restrictor 27 which permits pressure in the memory chamber 25 to decay into the application chamber 12 when the pressure in the application chamber 12 reduces at a skid point. Application pressure is supplied to the application chamber through a normally open latch valve 14 and a restrictor 18 in a by-pass passage 16, 17. Re-application of the brakes following a skid is controlled by closure of the latch valve 14 which permits only a restricted flow of application pressure through the restrictor 18 into the application chamber 12. This is sufficient to re-apply the brakes rapidly in a first stage until the pressure in the application chamber 12 becomes equal to that of the decayed pressure in the memory chamber 25 and the valve 26 opens. Brake-application then continues at a lower rate in a second stage since the restricted flow of control pressure has also to increase the pressure in the memory chamber 25. This continues until the latch valve 14 re- opens so that the brakes are re-applied in a third stage at an original application rate. The maximum pressure differential between the chambers 22 and 25 is limited by a valve spring 30 to advance the beginning of the third stage after a prolonged skid signal. <IMAGE>
GB7841509A 1977-11-12 1978-10-23 Fluid-pressure operated braking systems for vehicles Expired GB2007787B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7841509A GB2007787B (en) 1977-11-12 1978-10-23 Fluid-pressure operated braking systems for vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4718477 1977-11-12
GB7841509A GB2007787B (en) 1977-11-12 1978-10-23 Fluid-pressure operated braking systems for vehicles

Publications (2)

Publication Number Publication Date
GB2007787A true GB2007787A (en) 1979-05-23
GB2007787B GB2007787B (en) 1982-02-24

Family

ID=26265994

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7841509A Expired GB2007787B (en) 1977-11-12 1978-10-23 Fluid-pressure operated braking systems for vehicles

Country Status (1)

Country Link
GB (1) GB2007787B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462314A1 (en) * 1979-07-26 1981-02-13 Knorr Bremse Gmbh BRAKE FORCE ADJUSTING CIRCUIT WITH DAMAGE PROTECTION FOR RAIL VEHICLES
FR2536357A1 (en) * 1982-11-23 1984-05-25 Lucas Ind Plc IMPROVEMENTS IN PRESSURE FLUID AND PRESSURE FLUID BRAKING SYSTEMS FOR VEHICLES
EP0304264A2 (en) * 1987-08-19 1989-02-22 Grau Limited Improvements in fluid-pressure operated anti-skid braking systems for vehicles
US4893880A (en) * 1987-05-16 1990-01-16 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462314A1 (en) * 1979-07-26 1981-02-13 Knorr Bremse Gmbh BRAKE FORCE ADJUSTING CIRCUIT WITH DAMAGE PROTECTION FOR RAIL VEHICLES
FR2536357A1 (en) * 1982-11-23 1984-05-25 Lucas Ind Plc IMPROVEMENTS IN PRESSURE FLUID AND PRESSURE FLUID BRAKING SYSTEMS FOR VEHICLES
US4893880A (en) * 1987-05-16 1990-01-16 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system
EP0304264A2 (en) * 1987-08-19 1989-02-22 Grau Limited Improvements in fluid-pressure operated anti-skid braking systems for vehicles
EP0304264A3 (en) * 1987-08-19 1989-08-30 Lucas Industries Public Limited Company Improvements in fluid-pressure operated anti-skid braking systems for vehicles

Also Published As

Publication number Publication date
GB2007787B (en) 1982-02-24

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Legal Events

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