Patent ID: 8366204
Filing Date: 2013-02-05
Classification: B60T

Abstract:
1. A brake system for a vehicle, comprising: an operation member on which a braking operation is performed by an occupant; a master cylinder in which a front pressure chamber and a rear pressure chamber are defined by a drive piston, which is movable and supported in the master cylinder and which outputs a hydraulic pressure in the front pressure chamber by the drive piston being moved by the operation member; a control pressure setting unit configured to set a target control pressure according to an operation force input from the operation member to the drive piston; a hydraulic pressure supply source; first and second wheel cylinders coupled to the front pressure chamber that generate a braking force to wheels; a first pressure control valve that adjusts a hydraulic pressure from the hydraulic pressure supply source on the basis of the target control pressure, and that outputs a first adjusted hydraulic pressure to the first wheel cylinder; a second pressure control valve that adjusts the hydraulic pressure from the hydraulic pressure supply source on the basis of the target control pressure, and that outputs a second adjusted hydraulic pressure directly to the rear pressure chamber to assist the drive piston to output the hydraulic pressure in the front pressure chamber directly to one of the first and second wheel cylinders; and a switching valve that makes a hydraulic connection between the first and second wheel cylinders or that interrupts the hydraulic connection.