Introduction: It is a disc or cylindrical part that slides to and fro in a hollow cylinder.
Definition:
“In an internal-combustion engine it is forced to move by the expanding gases in the cylinder head and is attached by a pivoted connecting rod to a crankshaft or flywheel, thus converting reciprocating motion into rotation.”
Piston:
Fig: Piston
Piston terminology:
A piston of an internal combustion engine serves three functions: