| 摘要 |
A master cylinder 21 includes pressurizing chambers 21a1, 21b1 and atmospheric pressure chambers 21a2, 21b2 which are in communication with a reservoir 22 provided upstream. The pressurizing chambers 21a1, 21b1 of the master cylinder 21 are connected to a brake fluid pressure control valve device 50 through master pressure pipes 11, 12 provided with master cut valves 23, 24, respectively. The atmospheric pressure chambers 21 a2, 21 b2 of the master cylinder 21 bypass the master cut valves 23, 24 and are connected to the brake fluid pressure control valve device 50 through bypass pipes 13, 14 provided with a check valves 25, 26, respectively. A pump 55a, 55b constituting a brake fluid pressurizing section 55 of the brake hydraulic control valve device 50 suctions the brake fluid from the reservoir 22 preferentially through the bypass pipes 13, 14 provided with the check valves 25, 26 and pressurizes the brake fluid to supply a brake fluid pressure to brake fluid pressure adjust sections 51 to 54, respectively. |
