| 摘要 |
PROBLEM TO BE SOLVED: To provide a selector valve for hydraulic control having high response performance with a compact and simple structure while taking advantage of characteristic of a spool valve type.SOLUTION: In a basic constitution having a valve body 30 with various ports 32-35, a spool 40 having lands 41, 42 for switching a communication state of various ports and a control chamber 43, and a working chamber 37 for supplying a working oil pressure and a spring chamber 38 for restoration disposed through the spool 40, the spool 40 includes a communication passage 44 for communicating the working chamber 37 and the control chamber 43, and first valve means 50 for opening the communication passage 44 when an oil pressure of the working chamber 37 is drained. Accordingly, the oil pressure of the control chamber 43 can be pre-released through the communication passage 44 → the working chamber 37, when the oil pressure of the working chamber 37 is drained, and response performance can be improved.SELECTED DRAWING: Figure 2 |
