Vehicle braking force control system

Details Vehicle braking force control system Vehicle braking force control system

1991-06-07

1993-01-05

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303100, 303104, 303105, B60T 832, B60T 870

Patent

active

051764440

ABSTRACT:
A braking force control system controls the brake fluid pressure applied to the wheel during braking when each of the wheels of the vehicle tends to lock so that the slip ratio of the wheel converges on a target slip ratio. The brake fluid pressure is once fixed at the beginning of the braking force control, and when the slip ratio falls below the target slip ratio by fixing the brake fluid pressure, the brake fluid pressure is increased at a first rate, and when the slip ratio does not increase to a predetermined slip ratio in a predetermined time after the slip ratio falls below the target slip ratio or when the rate of increase of the slip ratio after the slip ratio falls below the target slip ratio is lower than a predetermined rate, the brake fluid pressure is increased at a second rate which is higher than the first rate.

REFERENCES:
patent: 3550966 (1970-12-01), Leiber
patent: 3727992 (1973-04-01), Bowler et al.
patent: 3888550 (1975-06-01), Reinecke et al.
patent: 4033634 (1977-07-01), Arai et al.
patent: 4575160 (1986-03-01), Leiber et al.
patent: 4585280 (1986-04-01), Leiber
patent: 4779696 (1988-10-01), Harada et al.
patent: 4881784 (1989-11-01), Leppek
Bosch Technische Berichte, English special edition (Feb. 1982), ISSN 0006-789X, pp. 78-82, Technical and Scientific Report I.

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