| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the number of parts, decrease a sliding region between the parts, enhance the air-tightness of working fluid, and keep constant the pressure in a reaction chamber. SOLUTION: A proportional solenoid 52 comprises a pin 11 extended in the sliding direction of a spool 14, a bore 13 having a longer length than the pin 11 to enable the pin 11 to slide, a first groove 24 communicated with an oil passage change valve, and a second groove 27 communicating with a reaction chamber 67 and also with the first groove 24, and further the second groove 27 is communicated with the bore 13.</p> |
