| 摘要 |
<p>A flow control valve includes a valve body (1) having a substantially cylindrical bore, and a substantially cylindrical valve element (8) received within the cylindrical bore of the valve body to be reciprocatable. The valve body and the valve element define first and second chambers separated by the valve element. The valve body has a circumferential groove (26) surrounding the valve element, and a plurality of radially-extending passage holes (27) communicating with the circumferential groove. The circumferential groove and the passage holes form portions of the second chamber. The valve element has a plurality of radially-extending throttle holes (25) for establishing communication between the circumferential groove and the first chamber. The flow rate of operation oil flowing between the first chamber and the second chamber via the throttle holes is changed through axial movement of the valve element. The passage holes and the throttle holes are circumferentially arranged in such a manner that even when one of the passage holes circumferentially overlaps one of the throttle holes, the remaining passage hole or holes do not circumferentially overlap the remaining throttle hole or holes. <IMAGE></p> |
