| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide valve structure of a relief valve for an oil filter, controlling valve open pressure to be decreased only in a predetermined low-temperature state. <P>SOLUTION: The valve structure of a relief valve for an oil filter, comprises: a valve housing 21 having an oil inlet 101 and an oil outlet 102; a valve member 22 disposed in the valve housing 21 to be slidable and forming a bypass passage; an elastic member 23 urging the valve member 22 on an oil inlet 101 side; a shape-memory alloy spring 201 connected with a closed cover body 24 of the valve housing 21; and a movable cover body 201 connecting the elastic member 23 with the shape-memory alloy spring 201. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
