What are the factors that cause cylinder wear?

[DiLucy]

Factors causing cylinder wear include: 1. Poor lubrication - During engine operation, the upper part of the cylinder has poor lubrication conditions with high wall temperatures, making it difficult to form a good oil film. Additionally, fine oil droplets in the combustible mixture continuously wash the cylinder walls, further damaging the oil film and causing dry or semi-dry friction between the upper cylinder and piston rings; 2. Abrasive wear - When dust enters with air or lubricating oil contains impurities, abrasive wear occurs; 3. Mechanical wear from high pressure - During operation, piston rings press tightly against cylinder walls under their own elasticity and gas pressure, causing mechanical wear through relative friction during reciprocating motion; 4. Corrosion from acidic substances - Fuel contains a certain proportion of sulfur, whose combustion produces oxides that combine with water in byproducts to form sulfuric acid vapor, which condenses and corrodes cylinder walls.