| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydraulic control valve, capable of timely and accurately detecting an axial movement position of a spool valve element. <P>SOLUTION: The hydraulic control valve includes: a hollow valve body 51 formed with a plurality of ports; the spool valve element 52 disposed within the valve body in an axially slidable manner, the element changing the opening area of the ports by axially sliding; a valve spring 53 which urges the spool valve element toward one axial side; an electromagnetic solenoid 54 which moves the spool valve element toward the other axial side against the spring force of the valve spring by being electrified; and a semiconductor strain sensor 80 provided on the outer circumferential surface of a peripheral portion 51b of a stepped surface 51a which receives the spring force of the valve spring, the sensor detecting strain of the peripheral portion according to change in spring force of the valve spring. <P>COPYRIGHT: (C)2013,JPO&INPIT |
