Engine piston ring and cylinder liner on the impact of the following main points:

(1) cylinder roundness, perpendicularity and position accuracy is poor, resulting in the piston does not wear the ring and the cylinder wall surface strain, causing the engine to smoke power down;

(2) cylinder bore surface roughness is too small, causing the piston rings and steel wall injury, causing the engine to smoke.

(3) the outer surface of the cylinder bore rough through the large, leading to severe piston ring wear, causing the engine to smoke;

(4) cylinder bore diameter is too small, causing the piston closed, hilarious, broken, causing the engine smoke and power down;

(5) the cylinder bore diameter is too large, resulting in severe wear rings, causing the engine smoke and power-down.