Patent ID: 8733849

Claim:
A brake control device comprising: a plurality of wheel cylinders that are supplied with a working fluid and give braking force to a plurality of wheels, respectively; a wheel cylinder pressure control system that controls working fluid pressure of the plurality of wheel cylinders independently of brake operation of a driver; a manual hydraulic pressure source that pressurizes the working fluid contained in the manual hydraulic pressure source in accordance with amount of operation of a brake operating member performed by the driver; a separation valve that is caused to be in a closed state during a brake mode for backup in which the working fluid is supplied from the manual hydraulic pressure source to the plurality of wheel cylinders, and that, when in the closed state, separates a first path that supplies the working fluid to at least one wheel cylinder of the plurality of wheel cylinders, and a second path that supplies the working fluid to at least one wheel cylinder of the plurality of wheel cylinders excluding the at least one wheel cylinder supplied with the working fluid by the first path; an open-close valve that is provided between the manual hydraulic pressure source and the wheel cylinders, and that is kept in a closed state despite a valve-opening command, due to an effect of a differential pressure between an outlet opening and an inlet opening of the open-close valve, when the differential pressure is greater than a predetermined pressure during the closed state of the open-close valve; and a control portion that closes the separation valve after sending the valve-opening command so as to lessen the differential pressure so that the open-close valve is opened in accordance with the valve-opening command when discontinuing a control via the wheel cylinder pressure control system and causing a shift to the brake mode for backup.