Patent ID: 7549710

Claim:
A vehicle-use brake device comprising: a master cylinder operatively interlockingly operable with a brake manipulation portion; wheel braking means for imparting a braking force to a wheel based on a hydraulic manipulation; a main brake passage for connecting the master cylinder and the wheel braking means; a normally-open first solenoid open/close valve operatively connected to the main brake passage for manipulating the communication between the master cylinder and the wheel braking means and the interruption of the communication; a reaction simulator for applying a pseudo hydraulic reaction corresponding to a manipulated variable of the brake manipulation portion to the master cylinder; a branch passage branched from a portion of the main brake passage at a position closer to the master cylinder than the first solenoid open/close valve for connecting the main brake passage and the reaction simulator; a normally-closed second solenoid open/close valve which is interposed in the branch passage for manipulating the communication between the master cylinder and the reaction simulator and the interruption of the communication; a hydraulic modulator for generating a liquid pressure by an electrically-operated actuator; a supply/discharge passage merged to a portion of the main brake passage at a position closer to the wheel braking means than the first solenoid open/close valve and for connecting the hydraulic modulator and the wheel braking means; a normally-closed third solenoid open/close valve interposed in the supply/discharge passage for manipulating the communication between the hydraulic modulator and the wheel braking means and the interruption of the communication; an input-side pressure sensor for detecting an inner pressure of a passage on a side of the master cylinder; an output-side pressure sensor for detecting an inner pressure of a passage on a side of the wheel braking means; and control means for controlling the hydraulic modulator and the first to third solenoid open/close valves in response to an operation state of a vehicle and a brake manipulation; wherein the input-side pressure sensor is arranged on the branch passage on a side of the reaction simulator while sandwiching the second solenoid open/close valve between the master cylinder and the input-side pressure sensor; and wherein the output-side pressure sensor is arranged on the supply/discharge passage on a side of the hydraulic modulator while sandwiching the third solenoid open/close valve between the wheel braking means and the output-side pressure sensor.