Patent ID: 6945612

Claim:
A brake control system for a motor vehicle with a master cylinder, a first wheel cylinder, and a second wheel cylinder, the brake control system comprising: a brake line with a supply line; a pump that supplies brake fluid to the supply line; branch lines branched from the supply line to the first and second wheel cylinders; a pressure controller that allows independent control of brake-fluid pressures within the first and second wheel cylinders; and an ECU that controls the pump and the pressure controller, the ECU comprising an estimate part that estimates the pressures within the first and second wheel cylinders in accordance with a flow amount of brake fluid obtained out of signals indicative of braking conditions, the estimate part being so programmed as to: estimate an amount of brake fluid flowing from the supply line to the first wheel cylinder, wherein the first wheel cylinder has a pressure that is lower than a pressure in the supply line, wherein the amount of brake fluid flowing from the supply line to the first wheel cylinder is estimated based on a difference between the pressure within the first wheel cylinder and the pressure in the supply line when the control to the first wheel cylinder is switched to pressure-increase control; and estimate an actual pressure within the first wheel cylinder based on the estimated amount of brake fluid.