| 摘要 |
The purpose of the invention is to provide a combined oil control ring for automobile engines that is capable of maintaining excellent oil control function even during long periods of engine operation without the occurrence of adhesions between the spacer expander and the side rails. In the combined oil control ring, which is obtained from two side rails, that is, upper and lower side rails, and a spacer expander in which wave-like hills and valleys are formed in the axial direction, the legs that connect the hills and valleys of the spacer expander have a configuration that comprises a portion with an angle (theta) of inclination from the axial direction of 15° or more. |
