Brake control device for vehicle

A brake control device for a vehicle comprising:

• a hydraulic brake device including:
• a master cylinder which generates a brake fluid pressure according to a brake operation amount of a brake operating member by a driver;
• wheel cylinders which are connected to the master cylinder by main pipe line and which generate a braking force according to the generated fluid pressure;
• a differential pressure control valve which is disposed in the main pipe line and which generates a differential pressure corresponding to a fluid pressure difference between the master cylinder and the wheel cylinders, and
• a pump which sucks the brake fluid from a portion of the main pipe line between the differential pressure control valve and the master cylinder and which discharges the brake fluid to a portion of the main pipe line between the differential pressure control valve and the wheel cylinder for increasing the brake fluid pressures of the wheel cylinders;
• and
• a differential pressure control unit which operates the pump and which transmits a differential pressure instructing output to the differential pressure control valve to perform a differential pressure control such that a differential pressure corresponding to the differential pressure instructing output is generated;
• wherein the differential pressure control unit is configured to:
• calculate, when the differential pressure generated by the differential pressure control valve is to be increased during operation of the brake operating member by the driver, an amount, which corresponds to an amount by which the fluid pressure of the wheel cylinder is to be increased by the differential pressure control unit, by which the fluid pressure of the master cylinder will decrease relative to the fluid pressure of the master cylinder when the fluid pressure of the wheel cylinder is not increased by the differential pressure control unit;
• correct the differential pressure instructing output by the calculated amount by which the fluid pressure of the master cylinder will decrease;
• and
• transmit, to the differential pressure control valve, the differential pressure instructing output which has been corrected by the calculated amount by which the fluid pressure of the master cylinder will decrease.