Engine cylinder liner and piston ring are a pair of extremely critical friction pairs inside the engine. In daily operation, they need to work continuously under various complex environmental conditions such as high temperature, high pressure, alternating load and corrosion. This long-term work in extreme and changeable environment makes the cylinder liner and piston ring bear great challenges. Due to these harsh working conditions, the friction and wear between the cylinder liner and the piston ring will gradually increase, which will eventually lead to the wear and deformation of the cylinder liner.

The wear and deformation of the cylinder liner not only directly affects the sealing performance of the piston ring in the cylinder liner, but also has a significant impact on the power, economy and service life of the engine. When the cylinder liner is worn and deformed, its shape and size change, which causes the movement of the piston ring in the cylinder liner to become unstable, and the sealing performance decreases, which in turn causes fuel and oil leakage, and increases engine fuel consumption and emissions. In addition, the wear and deformation of the cylinder liner will also affect the compression ratio of the engine, reduce the thermal efficiency of the engine, and further reduce the power and economy of the engine.

Therefore, a careful analysis of the causes of cylinder liner wear and deformation is of great significance for improving the economy of the engine. Through the study of the reasons for the wear and deformation of the cylinder liner, we can find the key factors that cause the wear and deformation of the cylinder liner, so as to take corresponding measures to reduce the wear and deformation of the cylinder liner and improve the service life and performance of the engine. This can not only reduce the maintenance and replacement costs of the engine, but also improve the fuel economy and environmental performance of the engine, and bring greater economic and social benefits to car owners.