Fluid-pressure and analogous brake systems – Pipeless valves
Patent
1991-09-23
1993-03-16
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Pipeless valves
303100, B60T 858
Patent
active
051938863
ABSTRACT:
An anti-skid control circuit for a wheeled vehicle and a method of processor computation confirmation within such an anti-skid control circuit includes the confirmation of proper processor operation only at a certain one of the computation values. Rotation of a vehicle wheel provides a pulse train the repetition rate of which is indicative of the vehicle speed. A sequence of program steps is repetitively executed in a mircroprocessor (17) over a fixed time interval with the microprocessor (17) repeating that same predetermined sequence of program steps during each successive said fixed time interval. A second pulse train is provided having one pulse for each repetition of the sequence of program steps. The speed of at least one vehicle wheel is repetitively computed according to the repetition rate of the first pulse train and the repetition rates of the first and second pulse trains are compared, and corrective action is initiated in the event that the compared repetition rates differ by more than a prescribed amount. The comparison is effected only at a certain specific wheel speed. Alternatively, a computed wheel speed may be compared to the fixed time interval and the anti-skid circuit allowed to continue in operating only so long as the compared wheel speed and time interval are within predetermined limits of one another. Again, the step of comparing is effected only at a certain specific wheel speed.
REFERENCES:
patent: 4106821 (1978-08-01), Brearley
patent: 4125825 (1978-11-01), Takeuchi et al.
patent: 4270808 (1981-06-01), Brearley
patent: 4270809 (1981-06-01), Ohmori et al.
patent: 4335430 (1982-06-01), Ohmori et al.
patent: 4360918 (1982-11-01), Ruhnau et al.
patent: 4425622 (1984-01-01), Arikawa
patent: 4499543 (1985-02-01), Matsuda
patent: 4546437 (1985-10-01), Bleckmann et al.
patent: 4629259 (1986-12-01), Brauninger
patent: 4700304 (1987-10-01), Byrne et al.
patent: 4709341 (1987-11-01), Matsuda
patent: 4773072 (1988-09-01), Fennel
patent: 4916698 (1990-04-01), McCann
patent: 4917443 (1990-04-01), Kramer et al.
patent: 5001641 (1991-03-01), Makino
patent: 5074626 (1991-12-01), Kramer et al.
Allied-Signal Inc.
Decker Ken C.
Muratori Alfred
Oberleitner Robert J.
Palguta Larry J.
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