Automobile piston is like the central part of automobile engine, which plays an extremely important role in engine starting. Automobile piston is used to bear the gas pressure, and through the piston pin to make the connecting rod drive the crankshaft to rotate. The top of the piston is still part of the combustion chamber. The general automobile piston is divided into three categories: diesel engine piston, gasoline engine piston and general-purpose piston.

HCVAC coating machine is used for piston parts. High performance hard carbon based coatings are available that reduce friction and wear and improve power and reliability. The greatly improved wear resistance extends the service life and durability of components and provides emergency operation reserve. Reduced friction loss increases power output and reduces engine heat load. Using lighter materials and a more compact design can reduce overall weight and cost, and the original parts can be coated without any design changes.