| 摘要 |
PROBLEM TO BE SOLVED: To provide a control valve which keeps high ability to discharge an oil leaking into a spring chamber and reduces the manufacture costs.SOLUTION: A control valve 1 switches an oil flow passage by moving a spool 10 and includes: a thrust washer 40 provided at an outer periphery of the spool; and a spring 30 which biases the spool in a spool axial direction through the thrust washer. The control valve further includes a housing 20 having a spool housing hole 23 housing a part of the spool and a spring chamber 27 housing at least the spring and the thrust washer. In the housing, a discharge port 28 which discharges an oil in the spring chamber and a groove part 100 extending along the spool axial direction in the spring chamber are formed.SELECTED DRAWING: Figure 1 |
