Brake control system for an electrically operated vehicle

摘要

The present invention is directed to a brake control system for controlling a braking force applied to a wheel of an electrically operated vehicle. A changeover device is disposed in a main passage for selectively placing one of a first operating position where a static hydraulic pressure supplied from a master cylinder to a wheel brake cylinder is controlled to be lower than a master cylinder pressure generated from the master cylinder when an electric motor applies the regenerative braking force to the wheel, and a second operating position where the static hydraulic pressure is controlled to be substantially equal to the master cylinder pressure when the electric motor does not apply the regenerative braking force to the wheel. A pressure transmitting device is communicated with a dynamic pressure generator through an auxiliary passage and connected to the main passage between the changeover device and the wheel brake cylinder, so that it fluidly separates the dynamic hydraulic pressure and the hydraulic pressure in the wheel brake cylinder, and transmits the dynamic hydraulic pressure to the wheel brake cylinder. And, a valve device is disposed in the auxiliary passage so as to close the auxiliary passage when the regenerative braking force is applied to the wheel, and alternately open and close the auxiliary passage when the hydraulic braking force is applied to the wheel.