| 摘要 |
The invention relates to a device in piston rings (6) fitted on pistons of internal combustion engines. These rings have a top face (7), a bottom face (8), and a peripheral edge face (13) the latter face forming the wear face sliding against an engine cylinder bore. A hole (9) extends from the top face (7) to the bottom face (8) of the piston ring (6) for passage-through of a smaller amount of combustion gases from the engine combustion chamber. Intermediate each hole opening on the bottom face (8) of the ring (6) and its peripheral edge face (13) additionally extends a channel (12) for outlet of said amount of combustion gases into the cylinder bore below the piston ring (6). |
