What Causes Cylinder Wear?
1 Answers
Causes of cylinder wear: 1. Poor lubrication - During engine operation, the upper part of the cylinder has poor lubrication conditions and high wall temperature, making it difficult to form a good oil film. Additionally, fine oil particles in the combustible mixture continuously wash the cylinder walls, further damaging the oil film, leading to dry or semi-dry friction between the upper cylinder and piston rings, resulting in cylinder wear. 2. Abrasive wear - When dust enters the cylinder with air or when lubricating oil contains impurities, abrasive wear occurs. 3. Mechanical wear caused by high pressure - During engine operation, piston rings press tightly against the cylinder walls under their own elasticity and gas pressure. The reciprocating motion of pistons causes mechanical wear due to relative friction. 4. Corrosion caused by acidic substances - Fuel contains a certain proportion of sulfur, which produces oxides during combustion. These combine with water in combustion products to form sulfuric acid vapor, which condenses and contacts cylinder walls, causing corrosion.