| 摘要 |
PROBLEM TO BE SOLVED: To provide pistons and piston rings which can reduce wear and lubricating oil consumption.SOLUTION: The distribution of combustion gases within an engine is controlled using, e.g., a radial channel 100 and/or an axial channel. For example, the combustion gases may exert pressure against an outer face 90 of a top ring 44 of a piston assembly 25. The radial channel 100 or the axial channel may transfer the combustion gases to a space 130 adjacent to an inner surface 124 of the top ring 44, thus controlling the pressure gradient between the outer face 90 and the inner face 124. |
