Patent ID: 9522668
Filing Date: 2016-12-20
CPC Classification: B60T

Claim Text:
1. A brake apparatus comprising: a hydraulic-pressure source configured to supply a plurality of wheel cylinders with a brake fluid pressure corresponding to a brake pedal operation by a driver; a first fluid passage configured to fluidically communicate the hydraulic-pressure source with a first wheel cylinder that is at least one of the wheel cylinders; a second fluid passage configured to fluidically communicate the hydraulic-pressure source with a second wheel cylinder that is another of the wheel cylinders; a first control valve placed in the first fluid passage to be located between the first wheel cylinder and the hydraulic-pressure source; a second control valve placed in the second fluid passage to be located between the second wheel cylinder and the hydraulic-pressure source; a first hydraulic-pressure sensor placed in the first fluid passage and configured to detect a hydraulic pressure existing between the hydraulic-pressure source and the first wheel cylinder; a second hydraulic-pressure sensor placed in the second fluid passage and configured to detect a hydraulic pressure existing between the hydraulic-pressure source and the second wheel cylinder; a fluid-leakage detecting unit configured to supply a brake fluid to the first and second fluid passages through the hydraulic-pressure source, switch the first and second control valves alternately between open and closed positions more than once, and detect a brake-fluid leakage in the first or second fluid passage on the basis of magnitudes of detection values detected by the first and second hydraulic-pressure sensors during the open-close switching, and a target wheel-cylinder hydraulic pressure controlling unit configured to calculate a target wheel-cylinder hydraulic pressure corresponding to the brake pedal operation by the driver, wherein: the fluid-leakage detecting unit is configured to carry out fluid leakage detection processing when a deviation between the target wheel-cylinder hydraulic pressure calculated during the brake pedal operation by the driver and detection values of the first and second hydraulic-pressure sensors is larger than a predetermined deviation.