Patent ID: 6070954
Filing Date: 2000-06-06
Classification: B60L,B60T,Y02T,Y10S

Abstract:
A brake control system for controlling a braking force applied to a wheel of an electrically operated vehicle that includes a brake pedal, comprising:an electric motor operatively connected to the wheel for applying a regenerative braking torque to the wheel;a wheel brake cylinder operatively mounted on the wheel for supplying a braking force to the wheel;static hydraulic pressure generating means for generating a static hydraulic pressure whose magnitude depends on a degree of depression of the brake pedal which is movable between a rest position and a fully depressed position;dynamic hydraulic pressure generating means for generating a dynamic hydraulic pressure;regulating means for substantially equalizing the dynamic hydraulic pressure to the static hydraulic pressure;static hydraulic pressure supply means for adjusting the static hydraulic pressure to a value obtained by subtracting a pressure equivalent to the regenerative braking torque from the static hydraulic pressure and supplying the resultant static hydraulic pressure to the wheel brake cylinder;dynamic hydraulic pressure supply means for supplying the dynamic hydraulic pressure as is to the wheel brake cylinder; andcontrol means for controlling both the static hydraulic pressure supply means and the dynamic hydraulic pressure supply means so that while the brake pedal is moving from the rest position the wheel brake cylinder is supplied with only the static hydraulic pressure from the static hydraulic pressure supply means and while the brake pedal is retained at a retained position the wheel brake cylinder is supplied with the static hydraulic pressure from the static hydraulic pressure supply means and the dynamic hydraulic pressure from the dynamic hydraulic pressure supply means.