Patent ID: 6196643
Filing Date: 2001-03-06
Classification: B60T

Abstract:
A brake control apparatus comprising:a wheel cylinder for applying a braking force to a wheel;a master cylinder for generating pressurized brake fluid according to operation of a brake pedal;a main line connecting the master cylinder to the wheel cylinder;a modulator disposed in the main line to control pressure in the wheel cylinder;a reservoir connected to the wheel cylinder through the modulator and to which the brake fluid from the modulator returns directly;a first valve for opening and closing the main line between the master cylinder and the modulator;a pump having an inlet side and an outlet side, the pump being connected to the reservoir at its inlet side and being connected to the main line between the first valve and the modulator at its outlet side;an auxiliary line connecting the inlet side of the pump to an outlet side of the master cylinder;a second valve for opening and closing the auxiliary line independently of the first valve;a pressure sensor for detecting an output pressure from the master cylinder; anda controller which controls the first valve, the second valve and the pump based upon the pressure detected by the pressure sensor so that the wheel cylinder receives a higher pressure than that of the master cylinder, the controller closing the second valve when the wheel cylinder receives higher pressure than that of the master cylinder and the output pressure at the master cylinder locks the wheels.