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A piston ring is a split 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 :
>Sealing the combustion chamber so that there is no transfer of gases from the combustion chamber to the crank.
>Supporting heat transfer from the piston to the cylinder wall.
>Regulating engine oil consumption
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