Brake control logic circuit for vehicle skid control brake syste

Details Brake control logic circuit for vehicle skid control brake syste Brake control logic circuit for vehicle skid control brake syste

1976-08-06

1977-11-29

Kunin, Stephen G.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

303 20, 361238, B60T 802

Patent

active

040602850

ABSTRACT:
An improved vehicle skid control braking system is provided of the type that selectively controls the engagement and disengagement of the brake system of the vehicle in accordance with selective braking conditions, such as, vehicle speed, wheel speed, road surface conditions, wheel speed "slip" conditions, etc. The system includes first and second signal generating circuit components for respectively generating vehicle wheel speed and vehicle speed signals; a comparator responsive to the wheel speed and vehicle speed signals for generating a first control signal when the relationship therebetween is at a predetermined condition; a third signal generating circuit component for generating a second and third control signal when the rate of change of the wheel speed reaches a first and second value, respectively; a fourth signal generating circuit component for generating a fourth control signal proportional to the rate of change of the wheel speed signal when the first and second values are reached; and logic circuitry selectively responsive to the first, second, third and fourth control signals for disengaging the vehicle brake system when the predetermined condition and first value are reached and for sequentially engaging and disengaging the vehicle brake system in response to the fourth control signal when the predetermined condition and second value are reached.

REFERENCES:
patent: 3578819 (1971-05-01), Atkins
patent: 3610703 (1971-10-01), Slavin et al.
patent: 3834770 (1974-09-01), Fleischer et al.
patent: 3880474 (1975-04-01), Scharlack

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