What is a piston?

A piston is a reciprocating part in the cylinder block of a car engine. The basic structure of a piston can be divided into a top, a head, and a skirt. The top of the piston is the main part of the combustion chamber, and its shape is related to the type of combustion chamber selected. Gasoline engines mostly use flat-top pistons, which have the advantage of a small heat absorption area. There are often various pits on the top of a diesel engine piston, and their specific shape, position, and size must be adapted to the requirements of the diesel engine's mixture formation and combustion.