| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve a problem wherein a valve lifter vertically moves in relation to a valve lifter housing part and also performs a rotary motion and reduction of sliding resistance against either one of the motions is conventionally considered, but a reduction measure of the sliding resistance simultaneously considering the sliding resistance against both of the motions is not taken. <P>SOLUTION: In this valve gear, texture portions and non-texture portions are alternately formed in a longitudinal direction on a side surface of the valve lifter or an inner wall surface of the valve lifter housing part, and further fine dynamic pressure generation grooves are disposed to all over the texture portions. Accordingly, dynamic pressure is generated in a rotating direction to obtain an effect by fluid lubrication and a constitution having little sliding resistance in the longitudinal direction is provided. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
