Anti-skid control with fail-safe function

Details Anti-skid control with fail-safe function Anti-skid control with fail-safe function

1986-02-26

1988-12-06

Chin, Gary

Boots, shoes, and leggings

303 92, B60T 888

Patent

active

047899387

ABSTRACT:
In an anti-skid control system for a motor vehicle there is provided a fail-safe control system for providing a compensation for a proper vehicle braking operation against the occurrence of failure of a hydraulic pressure control valve. The fail-safe control system includes a device for monitoring a control signal for controlling the operation of the control valve so that the hydraulic pressure applied to a wheel braking cylinder is regulated for preventing a wheel of the vehicle from skidding. The monitoring device detects the occurrence of failure of the control valve when the control signal indicative of one of the operation modes of the control valve is continuously generated more than a predetermined time period. In response to the detection, the fail-safe control system switches a directional control valve to the passage-opening condition so that the hydraulic pressure from a master cylinder can directly be applied to the wheel braking cylinder, thereby enabling the braking operation to be controlled by a vehicle driver.

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patent: 3883184 (1975-05-01), Jonner et al.
patent: 3920284 (1975-11-01), Lane et al.
patent: 4013324 (1977-03-01), Quon
patent: 4059312 (1977-11-01), Jonner
patent: 4287505 (1981-09-01), Ohmori et al.
patent: 4523791 (1985-06-01), Belart et al.
patent: 4636009 (1987-01-01), Tsuru et al.
patent: 4665490 (1987-05-01), Masaki et al.

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