Individual wheel antiskid brake control system arranged to prevent

Abstract

An antiskid brake control system for an automotive vehicle of the type having for each wheel signalling apparatus to scan and sense its dynamic behavior characteristics during braking and electronic evaluation circuitry whose output signals operate electro-pneumatic modulator valves to override the operator controlled fluid brake pressure at a respective wheel when the signalling apparatus indicates an impending wheel skid. The invention features a pulse generator for each wheel of a pair of wheels that is cross-connected with the evaluation circuitry of the opposite wheel so as to effect intermittent operation of one wheel modulator valve only when the evaluation circuit of the other wheel indicates an impending wheel skid in the absence of an impending wheel skid condition of the one wheel. The intermittent operation of the one wheel modulator valve effects brake pressure buildup at a slower than normal rate to prevent excessive brake pressure differences from arising sufficient to cause directional instability when the pair of wheels are the vehicle steering wheels. The invention has the advantage of assuring brake pressure buildup at the one wheel, even in the event the indication of an impending wheel skid by the evaluation circuit is due to a malfunction.