Hydraulic anti-lock braking systems for vehicles

Details Hydraulic anti-lock braking systems for vehicles Hydraulic anti-lock braking systems for vehicles

1989-05-05

1990-07-17

Reger, Duane A.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303110, B60T 840

Patent

active

049417134

ABSTRACT:
Fluid is adapted to be released from a brake to an expansion chamber from which a pump is adapted to withdraw fluid to achieve automatic re-application to the brake. The system includes an inlet valve between a master cylinder and the brake, a re-application valve between the pump and the brake, and a dump valve between the brake and the expansion chamber. The three valves are solenoid-operated and are operable in a predetermined sequence by a control module responsive to signals from means responsive to the behaviour of a wheel braked by the brake. Brake re-application pressure may be held in a "hold" mode by closing the re-application valve to prevent the pump from increasing the pressure within the brake. In a modification a separate, additional, hold valve may be provided to isolate the expansion chamber from the brake.

REFERENCES:
patent: 3756666 (1973-09-01), Leiber
patent: 4033638 (1977-07-01), Bertone et al.
patent: 4316642 (1982-02-01), Belart
patent: 4340258 (1982-07-01), Farr
patent: 4401348 (1983-08-01), Farr

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