GB1239565A - - Google Patents

Info

Publication number
GB1239565A
GB1239565A GB1239565DA GB1239565A GB 1239565 A GB1239565 A GB 1239565A GB 1239565D A GB1239565D A GB 1239565DA GB 1239565 A GB1239565 A GB 1239565A
Authority
GB
United Kingdom
Prior art keywords
pressure
brake
circuit
wheel
piston
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 GB1239565A publication Critical patent/GB1239565A/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
    • B60T8/1763—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to the coefficient of friction between the wheels and the ground surface
    • B60T8/17633—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to the coefficient of friction between the wheels and the ground surface based on analogue circuits or digital circuits comprised of discrete electronic elements

Abstract

1,239,565. Anti-skid brake systems. ALFRED TEVES G.m.b.H. 21 May, 1969 [24 May, 1968], No. 25953/69. Heading F2F. A device for preventing wheel lock, when the brakes of a motor vehicle are applied, by controlling the hydraulic pressure in the brake circuit comprises a sensor 2 rotatable with a wheel of the vehicle and having an output providing a measure of the rotary deceleration of the wheel and a control unit 3 including a differentiating circuit to which the sensor output is applied, the output of the circuit being such as to trigger an electronic switch to actuate an electromagnetic valve 4 to reduce the pressure in the brake circuit before the wheel becomes locked. The unit 3 includes two differentiating circuits 6, 7, the output voltage of which, when a limiting value is exceeded triggers an electronic switch 8. Valve 4 includes a piston 11 slidable in a cylinder against a spring 13 under the influence of a moving coil magnet arrangement 14. When brake pedal 1 is actuated, the control unit 3 is energized by means of a switch 9 and fluid is fed to both sides of piston 11 and to the brake shoes via lines 16, 17, 19, 20. When the control comes into action the piston 11 is pushed in the direction A against the hydraulic pressure, the connection between lines 16, 19 being interrupted so that brake pressure cannot be increased, until the magnetic force balances the hydraulic pressure. If pressure in the hydraulic circuit is still too high, a connection between lines 18, 19 allows fluid to flow back to the reservoir. In a modification, the regulation is independent of the pedal pressure.
GB1239565D 1968-05-24 1969-05-21 Expired GB1239565A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681755578 DE1755578B2 (en) 1968-05-24 1968-05-24 DEVICE TO PREVENT THE BLOCKING OF VEHICLE WHEELS

Publications (1)

Publication Number Publication Date
GB1239565A true GB1239565A (en) 1971-07-21

Family

ID=5693555

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1239565D Expired GB1239565A (en) 1968-05-24 1969-05-21

Country Status (4)

Country Link
JP (1) JPS4829679B1 (en)
DE (1) DE1755578B2 (en)
FR (1) FR2009261A1 (en)
GB (1) GB1239565A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933858A (en) * 1983-05-17 1990-06-12 Nissan Motor Company, Limited Anti-skid brake control system for an automotive brake system having variable deceleration threshold

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2258317A1 (en) * 1972-11-29 1974-06-20 Teldix Gmbh ANTI-LOCK CONTROL SYSTEM
JPS59209943A (en) * 1983-05-16 1984-11-28 Nissan Motor Co Ltd Anti-skid control device
DE3430098A1 (en) * 1984-08-16 1986-02-27 Alfred Teves Gmbh, 6000 Frankfurt Circuit arrangement for the control of a brake system with wheel slip control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933858A (en) * 1983-05-17 1990-06-12 Nissan Motor Company, Limited Anti-skid brake control system for an automotive brake system having variable deceleration threshold

Also Published As

Publication number Publication date
DE1755578B2 (en) 1976-03-25
JPS4829679B1 (en) 1973-09-12
DE1755578A1 (en) 1972-03-02
FR2009261A1 (en) 1970-01-30

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Legal Events

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