piston head

The piston head is the top surface of a piston, which comes into direct contact with the combustion gases inside the engine cylinder. It plays a crucial role in the combustion process, as it is the area where the fuel-air mixture is compressed and ignited. The shape of the piston head affects engine performance, efficiency, and emissions. Common shapes include flat, domed, or concave, each designed to optimize air-fuel mixing and flame propagation.