| 摘要 |
The invention relates to a piston ring system for a piston (1) of a two-stroke internal combustion engine, said piston ring system having an internal diameter > 400 mm. The piston ring system has a convex sliding surface, a vertex (15, 16) of the convex section (13, 14), and a supporting region that is in contact with a cylinder wall (2'). The piston ring system consists of a first piston ring (6) and at least one second piston ring (8), said first piston ring being near a combustion chamber and said second piston ring being arranged axially below the first piston ring. The vertex (15) of the convex section (13) of the first piston ring (6), measured from the piston ring lower flank surface (6"), is arranged below the piston ring center, and the vertex (16) of the second piston ring (8), measured from the piston ring lower flank surface (8"), is arranged above the piston ring center. |
