| 摘要 |
<p>PURPOSE:To reduce operating power of a device, by providing a brake control valve, holdable with pressure in accordance with clutch operation, in one channel, and providing an automatic valve, automatically holdable with pressure in accordance with operation of said control valve, in the other channel. CONSTITUTION:One fluid pressure generating chamber of a master cylinder 2 is connected to brake devices 7, 8 through pipes 4, 5 and brake control valve 6, and the other fluid generating chamber is connected to brake devices 12, 13 through pipes 9, 10 and automatic valve 11. The control valve 6 is equipped with a ball shaped valve element 37, and this valve element 37 is not seated to a valve seat 44 under a condition not depressed with a clutch pedal 77 because a small contour part 54 of a plunger 52 is protruded from the valve seat 44, but if the pedal 77 is depressed, a cam shaft 17 is turned through wires 78, 29 to move the plunger 52 rightward, an the valve element 37 can be seated to the valve seat 44. The automatic valve 11 is equipped with a piston 61, operated by pressure in a pressure chamber 64 communicated to the control valve 6, further with a valve 75, shutting off the pipe 9 from the pipe 10 by operation of this piston 61.</p> |
