| 摘要 |
<p>[Problem] To provide a valve lifter having a surface structure suitable for sliding conditions that allow excellent lubricating performance and a reduction in friction loss. [Solution] A first texture groove (132) for retaining lubricating oil is formed in the circumferential direction in a central region (130) defined by a radius (r1) from the center of a crown face of this valve lifter (100), and a second texture groove (152) for retaining the lubricating oil is formed in the circumferential direction in an outer circumferential region (150), separated by an intermediate region (140), that is defined by radii (r2, r3).</p> |
