| 摘要 |
The invention relates to a piston ring (10, 110, 210, 310, 410, 510, 610) for pistons of internal combustion engines, having a ring running surface (14), a ring back (11), an upper ring flank (12), a lower ring flank (13), and two ring joint ends spaced apart by a gap (15). According to the invention, at least one opening (17, 121, 217, 223, 325, 407) is provided in the ring running surface (14), which opening forms a fluid connection between the ring running surface (14) and the ring back (11) or a ring flank (12, 13). |
| 主权项 |
1. A piston ring for pistons of internal combustion engines, comprising a ring face, a ring back, an upper ring side, a lower ring side and two ring joint ends spaced apart by a gap, wherein the ring face has at least one groove only in the region of the ring joint ends, said at least one groove extending in a circumference direction, wherein every one of the at least one groove opens into a face surface of the ring joint end and forms a fluid connection between the ring face and ring back or ring side. |
