oil scraping piston ring
1Piston ring — A piston ring is an open ended ring that fits into a groove on the outer diameter of a piston in a reciprocating engine such as an internal combustion engine or steam engine. The three main functions of piston rings in reciprocating engines are:# …
2oil rail — The part of the oil ring responsible for the seal between piston and cylinder wall and thus for the actual scraping off of the oil …
