1.High precision manufacturing:The piston needs to fit closely with the cylinder wall of the engine, and the clearance must be controlled within a very small range to ensure the normal operation and good performance of the engine. 
2.Good wear resistance:During the operation of the engine, the piston constantly moves up and down in the cylinder, and there is frequent friction between the cylinder wall.
3.High efficiency heat dissipation performance:The engine will produce a lot of heat when working, the piston as a direct contact with high temperature gas parts, need to have good heat dissipation performance to prevent the piston from overheating and causing damage.
4.Reasonable weight design:The weight of the piston also has a certain effect on the operation of the engine. Heavy piston will increase engine load, reduce engine efficiency; Too light a piston may affect the balance and stability of the engine. 

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