| 摘要 |
PROBLEM TO BE SOLVED: To provide in constitution with short pipe length such a function that brake fluid pressure higher than that of usual time is generated when urgent braking operation is actuated. SOLUTION: In this device, disposed is a pump 76 provided with a suction hole communicatable to a hydraulic passage 22 communicating to a master cylinder 18, and a delivery hole communicatable to wheel cylinders 50, 52. The first master cut valve 28 and the first relief valve 34 are arranged between the master cylinder 18 and the wheel cylinders 50, 52. The first master cut valve 28 is usually kept in opened condition. When urgent brake operation is actuated, the first master cut valve 28 is brought into closed condition, a suction valve 78 is opened, and the pump 76 is made into ON-condition. Relief pressure of the first relief valve 34 is set to a prescribed assist pressure Pa. |
