B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
341/73.4
B60T 8/86 (2006.01) B60T 8/88 (2006.01)
Patent
CA 2005578
ABSTRACT In an anti-lock brake system for a motor vehicle, the system including apparatus for sensing the rate of rotation of a member whose rate of rotation is indicative of the speed of a wheel of the vehicle, apparatus for generating a wheel speed signal indicative of the rate of rotation, a main control circuit having apparatus for determining an incipient wheel-lock condition based on the wheel speed signal and apparatus for generating a brake release signal upon determining the incipient wheel-lock condition, and apparatus for releasing a brake in response to the brake-force release signal, the improvement comprising a main microprocessor, a fail-safe microprocessor of a different type, apparatus for connecting the main microprocessor to the brake-release apparatus such that the main microprocessor monitors whether the brake-releasing apparatus has released the brake in response to the brake-force release signal, and apparatus for electrically connecting the fail-safe microprocessor and main microprocessor such that the fail-safe microprocessor monitors the main microprocessor, the fail-safe microprocessor including apparatus for preventing release of the brake by the brake-release apparatus upon either a determination that the brake-release apparatus is functioning improperly or a determination that the main microprocessor is functioning improperly, whereby the fail-safe microprocessor is capable of disabling the brake-release system independently of the main microprocessor.
Kramer Dennis A.
Tousignant Alan E.
Turner Robert S.
Pascal & Associates
Rockwell International Corporation
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