| 摘要 |
PURPOSE:To realize a two-system liquid pressure controlling function with a simple construction, by a method wherein a sleeve is provided with valve holes into which valve heads of plungers are engaged, and each of the holes is inputted with a liquid pressure at an outlet of the other system. CONSTITUTION:A sleeve 13 is provided with valve holes 21.22, into which the valve heads 25.26 of plungers 23.24 are engaged. The plungers 23.24 are moved to the outside against springs 47.48 by pressure in input chambers 7.8 to perform proportional pressure-reducing control on liquid pressures in output chambers 9.10. Each of the pressure in the output chambers 9.10 is transmitted to the valve hole 21.22 in the other system by communicating passages 55.56. When one of the systems is failed, no pressure is exerted on the valve head of the plunger in the other system, so that a plunger-pressing force is reduced, and the proportional control is stopped. Accordingly, the two-system liquid pressure controlling function can be realized with a simple construction. |
