GB1250737A - - Google Patents

Info

Publication number
GB1250737A
GB1250737A GB1250737DA GB1250737A GB 1250737 A GB1250737 A GB 1250737A GB 1250737D A GB1250737D A GB 1250737DA GB 1250737 A GB1250737 A GB 1250737A
Authority
GB
United Kingdom
Prior art keywords
signal
wheel
produce
modulator
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
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 filed Critical
Publication of GB1250737A publication Critical patent/GB1250737A/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
    • B60T8/58—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 responsive to speed and another condition or to plural speed conditions
    • 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
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
    • B60T8/1761—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
    • B60T8/17613—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure based on analogue circuits or digital circuits comprised of discrete electronic elements
    • 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
    • B60T8/425—Debooster systems having a fluid actuated expansion unit pneumatically using a vacuum
    • 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
    • B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/885—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/415—Short-circuit, open circuit failure

Landscapes

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

Abstract

1,250,737. Antiskid brake systems. GENERAL MOTORS CORP. 19 Feb., 1970 [13 March, 1969], No. 7934/70. Heading F2C. In a method of controlling a brake pressure modulator 100 in an antiskid system the velocity of a braked wheel is sensed by a tachogenerator to produce a first signal on a line 28 simulating wheel deceleration during braking and a timedelayed second signal simulating vehicle deceleration, the two signals being compared to sense incipient wheel lock-up and produce an output signal which controls the modulator. The frequency signal from the tachogenerator 12 is fed to a frequency-to-voltage converter 18 and differentiated to produce an acceleration signal. Spurious signals due to wheel hop following brake application are overcome by providing a bias signal by means of a pulser 74 and an acceleration switch 78 causes brake application whenever wheel acceleration exceeds a predetermined value. The modulator 100 has an hydraulic portion 102 including a piston 126 moving in a bore 124 under the influence of a pneumatic chamber 104 divided by a diaphragm 106 having a rigid backing 108 and connected to a vacuum source 118 via a conduit 116 and to a valve 86 via a conduit 114, the valve being operated by a solenoid 84 energized by the control circuit so that sensing of an incipient wheel lock condition causes the piston 126 to be moved to allow a check valve 146 to close and isolate the, brakes from the master cylinder and to increase the volume within the bore 124 to reduce the braking pressure.
GB1250737D 1969-03-13 1970-02-19 Expired GB1250737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80680769A 1969-03-13 1969-03-13

Publications (1)

Publication Number Publication Date
GB1250737A true GB1250737A (en) 1971-10-20

Family

ID=25194888

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1250737D Expired GB1250737A (en) 1969-03-13 1970-02-19

Country Status (4)

Country Link
JP (1) JPS512595B1 (en)
CA (1) CA932836A (en)
FR (1) FR2034906B1 (en)
GB (1) GB1250737A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716273A (en) * 1970-06-01 1973-02-13 Gen Motors Corp Variable sensitivity anti-lock brake control
US3680923A (en) * 1971-03-15 1972-08-01 Gen Motors Corp Anti-lock brake control with sensor monitoring circuit
GB1439929A (en) * 1972-07-14 1976-06-16 Lucas Electrical Ltd Road vehicle anti-skid braking systems

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022114A (en) * 1958-01-31 1962-02-20 Thompson Ramo Wooldridge Inc Brake control system
FR1472207A (en) * 1966-01-24 1967-03-10 Crane Co Brake control system for independent wheel vehicles
US3398994A (en) * 1966-09-14 1968-08-27 Westinghouse Air Brake Co Anti-skid wheel control system for railway cars

Also Published As

Publication number Publication date
FR2034906A1 (en) 1970-12-18
DE2012897B2 (en) 1976-06-16
FR2034906B1 (en) 1974-02-01
JPS512595B1 (en) 1976-01-27
DE2012897A1 (en) 1970-10-08
CA932836A (en) 1973-08-28

Similar Documents

Publication Publication Date Title
GB1273423A (en) Skid control system
GB1328127A (en) Braking system
GB1284238A (en) Brake control system
GB1231319A (en)
GB1368391A (en) Braking systems for vehicles
GB1263989A (en) Brake system
US3909071A (en) Vehicle antiskid brake control system
GB1256099A (en) Improved modulating valve for a vehicle braking skid control system
GB1239418A (en)
GB1232333A (en)
GB1221167A (en) Electronic control for anti-lock brake system
GB1313879A (en) Control system for an antiskid wheel brake system
GB1243323A (en) A dual circuit brake system with antiskid control
GB1229745A (en)
GB1258370A (en)
GB1361619A (en) Vehicle brake control system
GB1313878A (en) Anti-skid brake system
GB1301170A (en) Anti-skid braking device for vehicles
GB1312896A (en) Vehicle anti-lock brake systems
GB1237814A (en) Method and apparatus for the antiskid control of brake pressure
GB1249969A (en) Antiskid control system
GB1369905A (en) Anti-locking brake system
GB1362711A (en) Anti-skid systems
GB1250737A (en)
GB1240442A (en) Anti-skid device

Legal Events

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