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2010 | OriginalPaper | Chapter
Piston rings
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Piston rings are mostly single-piece, slotted, and self-tightening. Their basic shape is a thinwalled, axially short circular cylinder. To generate the necessary contact pressure against the cylinder wall, the piston rings are in the shape of an open circular spring. The spring force acting radially in the installed state is greatly amplified by the gas pressure behind the piston ring.