Multiple control circuit

Claim 1

A control apparatus for controlling a plurality of slip control devices of an automobile, said control apparatus comprising: a plurality of non-redundant sensor means for outputting sensor signals; redundant control logic circuits for receiving the sensor signals from each of said sensor means as redundant signals, processing said redundant signals, and outputting a plurality of sets of redundant control signals for controlling the plurality of slip control devices; an output decision logic circuit having a plurality of logic means selected from a group comprising AND logic means, OR logic means and a combination of AND and OR logic means, each of said logic means having as inputs a different set of the plurality of redundant control signals, and each for outputting a non-redundant control signal for independently controlling one of the plurality of slip control devices; a plurality of comparator means for comparing said non-redundant control signals outputted by each of said plurality of logic means with signals outputted by each of said plurality of control logic circuits and for outputting a discrepancy signal if the thus compared signals are different from each other and if this state continues in excess of a predetermined period of time; a disablement means for disabling at least one of said slip control devices in response to said discrepancy signal being outputted by at least one of said plurality of comparator means.