Boots – shoes – and leggings
Patent
1990-06-19
1991-03-19
Black, Thomas G.
Boots, shoes, and leggings
180197, 303 95, G06F 1520, B60T 886
Patent
active
050016415
ABSTRACT:
An improved multiple control circuit is for use with an anti-lock brake control assembly. It includes a plurality of control logic circuits and an output decision circuit. The control circuits simultaneously receive redundant sensor signals representative of wheel speeds and carry out logical operations based upon the input signals to simultaneously transmit redundant command signals to control the brake pressure of the wheels. Such output signals are not directly sent to actuators, such as brake pressure control valves, but are instead sent through the output decision circuit. If the command signals of the control circuits should be different for some reason, the output decision circuit selects and transmits to the actuators the command signals to control the automobile in the safest manner based upon AND logic and OR logic. Each control circuit is connected to a comparator which compares the output signals of the control circuit with those of the output decision circuit. If there is a discrepancy between the signals and if such a discrepancy persists for a predetermined period of time, a failsafe signal is produced to disable the anti-lock brake control system.
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Black Thomas G.
Sumitomo Electric Industries Ltd.
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