Anti-lock brake control system for motor vehicle with facility for discriminating vibrations of driving wheels thereof

摘要

An anti-lock brake control system for motor vehicle which can determine vibrations of wheel speed brought about by rough-road condition and judder phenomenon by detecting a torque applied to a driving shaft of the motor vehicle in association with driving wheels without need for estimating a coefficient of friction of a road surface, to thereby improve and enhance the performance of the anti-lock brake control for the motor vehicle. Whether vibration of the driving wheel is brought about by a judder phenomenon or by a rough-road condition is decided on the basis of predetermined relations between the vibration state of the driving wheel and that of the torsion torque applied to the driving shaft.