| 摘要 |
PURPOSE:To save lubricant by making such that the lower face of top ring will make angle of 5'-25' against the lower face of the top ring groove when mounting. CONSTITUTION:When mounting a piston ring 10 in the top ring groove 12, it is selected such that the lower face of the piston ring 10 will make angle of 5'-25' against the lower face of the top ring groove 12. When said angle is smaller than 5', lubricant is not saved sufficiently. While when it is larger than 25', initial gnawing or edge loading of the piston ring 10 may cause abnormal abrasion on the sliding face of the piston ring 10 or the wall face of the cylinder 15. |
