Patent ID: 7938493
Filing Date: 2011-05-10
Classification: B60T

Abstract:
1. A brake control system comprising: a wheel cylinder that applies braking force to a wheel according to hydraulic pressure generated by a supply of hydraulic fluid; a brake operating member operated by a driver; an external reservoir in which hydraulic fluid is stored; a master cylinder which generates hydraulic master cylinder pressure according to an operating amount of the brake operating member, communication between the master cylinder and the external reservoir being cut off when the operating amount of the brake operating member is equal to or greater than a predetermined value; an internal reservoir which is communicatively connected to the master cylinder and in which hydraulic fluid is stored; a pump which selectively discharges hydraulic fluid in two directions, one being a direction that increases the hydraulic pressure in the wheel cylinder by drawing up hydraulic fluid from the internal reservoir, and the other being a direction that stores hydraulic fluid in the internal reservoir; and a pump control unit which controls the pump to discharge hydraulic fluid in the direction that stores hydraulic fluid in the internal reservoir when communication is open between the master cylinder and the external reservoir, and controls the pump to discharge hydraulic fluid in the direction that increases the hydraulic pressure in the wheel cylinder when the brake operating member is operated such that communication is cut off between the master cylinder and the external reservoir and when a sufficient braking force is not able to be generated by only the master cylinder pressure.