Patent ID: 7533944

Claim:
A brake control apparatus, comprising: a plurality of wheel cylinders that each apply braking force to one of a plurality of wheels when supplied with a hydraulic fluid; a wheel cylinder pressure control system that controls a wheel cylinder pressure independently of an operation of a brake operating member, wherein the wheel cylinder pressure is a pressure of the hydraulic fluid supplied to the wheel cylinders; a manual hydraulic pressure source that includes a first hydraulic pressure source which pressurizes a hydraulic fluid stored in a hydraulic chamber of the first hydraulic pressure source in accordance with an operation amount of the brake operating member, and a second hydraulic pressure source that includes a regulator that adjusts a pressure of a hydraulic fluid stored in a hydraulic chamber of the second hydraulic pressure source in accordance with the pressure of the hydraulic fluid in the hydraulic chamber of the first hydraulic pressure source; a hydraulic fluid supply path that connects the manual hydraulic pressure source to the wheel cylinders; and a controller that controls a manner in which the hydraulic fluid is supplied to the wheel cylinders, wherein: communication between the manual hydraulic pressure source and the wheel cylinders through the hydraulic fluid supply path is interrupted when the wheel cylinder pressure control system controls the wheel cylinder pressure, and the communication between the manual hydraulic pressure source and the wheel cylinders through the hydraulic fluid supply path is permitted so that the hydraulic fluid is supplied from the manual hydraulic pressure source to the wheel cylinders when the wheel cylinder pressure deviates from a target pressure, and when the wheel cylinder pressure deviates from the target pressure, the controller controls the manner in which the hydraulic fluid is supplied to the wheel cylinders so that the hydraulic fluid from the second hydraulic pressure source is initially supplied to each of the plurality of wheel cylinders and the hydraulic fluid from the first hydraulic pressure source is not supplied to any of the plurality of wheel cylinders, then the hydraulic fluid from the second hydraulic pressure source is supplied to both a first predetermined group and a second predetermined group of wheel cylinders of the plurality of wheel cylinders and the hydraulic fluid from the first hydraulic pressure source is supplied to only the second predetermined group of wheel cylinders of the plurality of wheel cylinders.