| 摘要 |
PURPOSE:To accomplish a two-system liquid pressure controlling function with a simple construction, by a method wherein sleeve pistons are provided on opposite sides of a plunger which is symmetrical on left and right sides, and a spring is compressed. CONSTITUTION:A sleeve 14 is provided at a central part of the interior of a casing 13, and a plunger 15 symmetrical on left and right sides is provided penetrating through the sleeve 14. The sleeve pistons 25.26 provided with annular seals 31.32 are provided on opposite sides of the plunger 15, and compress the spring 16 in accordance with the pressures in output chambers 9.10. By this, proportional pressure-reducing control is performed on liquid pressures at outlet ports 5.6, and when one of the systems is failed, the plunger 15 is moved to stop the pressure-reducing control on the other system. Accordingly, the two- system liquid pressure controlling function can be accomplished with a simple construction. |
