Method and apparatus for controlling the wheel brakes to prevent

Details Method and apparatus for controlling the wheel brakes to prevent Method and apparatus for controlling the wheel brakes to prevent

1976-06-11

1978-09-19

Kunin, Stephen G.

Fluid-pressure and analogous brake systems

Pipeless valves

188181C, 324161, 361242, B60T 810

Patent

active

041149572

ABSTRACT:
A brake control system for vehicles in which the difference in speed of rotation of a corresponding pair of wheels is detected in a prebraking mode of operation. If the difference in rotational speed exceeds a predetermined amount, the brakes on the pair of wheels are disabled. In one embodiment of the invention, the prebraking rotational speed ratio of the pair of wheels is determined by a comparator and electronic voltage control circuit, and the electrical output thereof fed to a valve control circuit for controlling the brake valves to maintain the braking rotational speed ratio of the wheels substantially equal to the prebraking rotational speed ratio. In the event the control circuits are unable to maintain the braking rotational speed ratio substantially equal to the prebraking rotational speed ratio, and such ratio exceeds a predetermined value, and a pendulum switch mechanism combined therewith indicates the beginning of a vehicle skid and spin, the brakes will be automatically disabled on both wheels. The disablement of the brakes is caused by a pair of pendulum switch mechanisms in combination with the control circuit.

REFERENCES:
patent: 3537002 (1970-10-01), Haner et al.
patent: 3608978 (1971-09-01), Neisch
patent: 3613075 (1971-10-01), Griffiths et al.
patent: 3620577 (1971-11-01), Neisch et al.
patent: 3629815 (1971-12-01), Hattwig
patent: 3656815 (1972-04-01), Talebi et al.
patent: 3657601 (1972-04-01), Darrow
patent: 3719246 (1973-03-01), Bott
patent: 3735200 (1973-05-01), Kritz
patent: 3948570 (1976-04-01), Fukumori et al.

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