Patent ID: 8029075

Claim:
A brake control apparatus comprising: a fluid pressure sensor to produce a sensor signal representing an actual master cylinder pressure of a master cylinder; a pump to suck a brake fluid from the master cylinder through a hydraulic circuit connecting the master cylinder to a wheel cylinder; and a controller to perform a brake assist control to supply a discharge pressure of the pump to the wheel cylinder and to return the brake fluid from the wheel cylinder to the master cylinder through the hydraulic circuit, in accordance with the sensor signal, the controller being configured, to calculate a modified master cylinder pressure by modifying the actual master cylinder pressure in accordance with an operating condition of the pump, to calculate a base pressure to represent a driver's brake operation quantity, in accordance with a variation of the modified master cylinder pressure, and to calculate a target wheel cylinder pressure in accordance with the base pressure, to control a braking force by controlling an actual wheel cylinder pressure of the wheel cylinder in accordance with the target wheel cylinder pressure.