Causes of Cylinder Wear
1 Answers
Causes of cylinder wear are as follows: 1. Poor lubrication. When the engine is running, the lubrication conditions in the upper part of the cylinder are poor, and the cylinder wall temperature is high, making it difficult to form a good oil film. In addition, fine oil particles in the combustible mixture continuously wash the cylinder wall, which also destroys the oil film on the cylinder wall. This results in dry or semi-dry friction between the upper part of the cylinder and the piston rings, causing cylinder wear. 2. Mechanical wear caused by high pressure. When the engine is running, the piston rings press tightly against the cylinder wall under the action of their own elasticity and gas pressure. When the piston reciprocates in the cylinder, mechanical wear occurs due to relative friction. The degree of wear depends on the magnitude of the normal force exerted by the piston rings on the inner cylinder wall. 3. Abrasive wear. When dust is present in the air entering the cylinder or when the lubricating oil contains impurities, abrasive wear occurs. Generally speaking, the cooling and lubrication conditions of the cylinder play a decisive role in wear, but the vehicle's operating conditions, maintenance, and repair quality also affect wear.