Copper sleeve role in preventing wear and tear of automotive cylinder liner good copper sleeve plays an important role,

 automotive cylinder liner is easy to be maro loss,because his working environment is very harsh. 

In addition to the quality of some copper sleeve is not qualified. There are also due to the structure of the wear and tear.

Wear caused by structural reasons

1) Poor lubrication conditions, so that the upper part of the cylinder liner wear. Automobile cylinder liner upper adjacent to the combustion chamber, 

the temperature is very high, lubrication conditions are very poor.

 Fresh air and unevaporated fuel flushing and dilution, exacerbating the deterioration of the upper conditions,

so that the cylinder are in a dry friction or semi-dry friction state, which is the cause of serious wear and tear of the upper part of the cylinder.

2) The upper part of the pressure, so that the cylinder wear is top-heavy bottom light.

 Piston ring in its own elasticity and back pressure under the action of tight pressure on the cylinder wall, the greater the positive pressure, 

the lubricant film formation and maintenance of the more difficult, mechanical wear increased.

 In the work stroke, with the piston down, the positive pressure is gradually reduced, and thus the cylinder wear is top-heavy bottom light.

3) mineral and organic acids make the cylinder surface corrosion spalling. 

Combustible mixture in the cylinder combustion, water vapour and acidic oxides,

 they dissolve in water to generate mineral acids, plus organic acids generated in the combustion, 

the cylinder surface corrosion, corrosion in the friction gradually scraped off by the piston ring, resulting in deformation of the cylinder liner.

4) Into the mechanical impurities, so that the middle of the cylinder wear increased. Dust in the air, impurities in the lubricating oil, etc., 

into the piston and cylinder wall caused by abrasive wear. Dust or impurities with the piston in the cylinder reciprocating movement,

 due to the position of the cylinder in the middle of the movement speed is large, so it exacerbates the wear of the middle of the cylinder.

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