Patent ID: 6385524
Filing Date: 2002-05-07
Classification: B60T

Abstract:
An automotive brake control system comprising:vehicle sensors which detect at least each wheel speed of road wheels to generate wheel speed sensor signals; an anti-brake skid unit which controls a wheel-brake cylinder pressure to each individual wheel cylinder of the road wheels to prevent a wheel lock-up condition during braking; a control unit being configured to be connected electrically to the vehicle sensors and the anti-brake skid unit to execute skid control having at least a reduce-pressure operating mode and a pressure build-up operating mode, when the wheel speed sensor signals indicate that at least one of the road wheels is locking up: said control unit comprising a road-surface-condition change determination section which determines, based on both a time length of brake-fluid-pressure control continuously executed during the skid control and a recovery acceleration of the wheel speed of the road wheel subjected to the skid control, whether there is a change of a road surface condition from a road surface having a low friction coefficient to a road surface having a high friction coefficient.