Patent ID: 9656650
Date: 2017-05-23
CPC Classifications: B60T

Claim:
1. A vehicle brake device, comprising: a first wheel cylinder for receiving a hydraulic pressure of a working fluid and applying a braking force to a wheel, that is among a plurality of wheel cylinders of a vehicle; a master cylinder for introducing therein a servo pressure generated in response to an operation by a driver on a brake pedal thereby generating a hydraulic pressure; a power hydraulic pressure source for generating a hydraulic pressure by drive of a pressurizing pump; a linear control valve for adjusting the hydraulic pressure transmitted from the power hydraulic pressure source to the first wheel cylinder; first hydraulic pressure detection means for detecting the hydraulic pressure output from the power hydraulic pressure source; second hydraulic pressure detection means for detecting the hydraulic pressure output from the master cylinder; third hydraulic pressure detection means for detecting the hydraulic pressure in the first wheel cylinder; and control means for controlling drive of the linear control valve based on the hydraulic pressure output from the master cylinder and detected by the second hydraulic pressure detection means, and the hydraulic pressure in the first wheel cylinder detected by the third hydraulic pressure detection means, wherein: the control means is configured to: the second hydraulic pressure detection means communicates to the brake system for the front right wheel or the brake system for the front left wheel; and the control means determines, after the at least one of the first and second communication states is switched, when at least the hydraulic pressures detected by the first hydraulic pressure detection means and the second hydraulic pressure detection means turn to increase and recover, that the failure occurs in a brake system not communicating to the second hydraulic pressure detection means out of the brake systems for the front right wheel and the front left wheel.