| 摘要 |
PURPOSE:To prevent breakage of oil film and abrasion at sliding section by forming the vane surface contactable with the sliding face of slit and the innercircumferential face of cam ring with predetermined coarseness then making many oil sump holes deeper than said coarseness in said surface. CONSTITUTION:The uppermost surface of the leading end section 16a and the sliding face 16c of vane 16 contacting with another member is formed with the surface coarseness lower than 0.1muRa. Furthermore, many oil sump holes 20 deeper than the surface coarseness are made in said surface with the maximum depth of at least 1mu for example. Since the lubricant can be temporarily stored in said holes 20, it can be fed quickly even upon mutual pressing of the sliding faces with strong force thus to prevent breakage of oil. Consequently, abrasion at the cam ring, rotor and vane 16 can be prevented. |
