4-Sensor 2-Channel Anti-Lock System for FWD Cars

The possibility of 2 Channel anti-lock system, which controls each of two independent hydraulic circuits of diagonal split braking system of FWD car seperately, were studied.

Theoretical investigation suggested two out of four possible control logics to be promising and they were proved to be practically satisfactory through vehicle test.

This system is almost as effective as expensive 3-channel or 4-channel system, when the braking force distribution between front and rear axles is correct as required by EEC Braking regulation. Under extreme condition that rear wheels lock earlier than fronts, the compromise between stopping distance and stability is necessary.