Patent ID: 6382739
Filing Date: 2002-05-07
Classification: B60T

Abstract:
A brake control system comprising:a brake unit for reducing brake hydraulic pressures in wheel cylinders for braking wheels of a vehicle, independent from one another; wheel speed sensors for detecting wheels speeds of the wheels, respectively; pseudo vehicle body speed producing means for determining a pseudo vehicle body speed in accordance with outputs of the wheel speed sensors; ABS control means for carrying out ABS control to prevent wheel locking on braking by decreasing a brake hydraulic pressure with the brake unit in accordance with a difference between the pseudo vehicle body speed and each of the wheel speeds; and abnormality determining means for detecting an abnormality in the outputs of the wheel speed sensors, and for causing the pseudo vehicle body speed producing means to determine the pseudo vehicle body speed in accordance with the outputs from the wheel speed sensors, excepting the output of the wheel speed sensor if an abnormality is detected therein; the abnormality determining means comprising an abnormal wheel discriminating means for determining whether an abnormal wheel is a drive wheel or not, to differentiate conditions for resetting the determination of abnormality in dependence on whether the abnormal wheel is a drive wheel or a non-drive wheel.