Cylinder wear
When the engine will exist at the same time, the types of wear, although different degree, but the influence each other.
1 abrasive wear inhalation: the air mixed with dust and oil have coke, honing metal impurity formed, such foreign hard abrasive, attached to the cylinder cylinder lens, cause.
2 corrosion wear mixture burned: after acid (such as C02, CO, S02) and moisture, cause of cylinder surface metal corrosion in Detroit, the friction effect, the surface of the metal cylinder, which caused corrosive wear.
3 a: when the cylinder wear melt with the pistons in bad lubrication condition when a decline, tiny part of metal contact, local high friction welding, sticky, touch, gradually expand is formed when wear, serious "cylinder-scoring was".
There are trends: normal wear in cross section, because cylinder piston skirt and the intrinsic to produce the lateral pressure cylinder wall will form the oval, In vertical section, because cylinder cylinder combustion near the high temperature, the formation of oil film is formed under the big small pour cone.
The reason of abnormal wear
1 the cylinder with inhaled worn: massive dust or serious microactivity, maintenance or replacement should be cleared the air filter, coke, and check for oil.
2 the oil cylinder wear serious: contain a lot of metal abrasive or dust cleaning of oil, should be replaced.
3 the central cylinder worn with engine too cold, and cold start producing corrosion wear, with frequent cooling system for inspection.
4 BDC first piston wear serious engine overheat, heat: well, should check cooling system, including spark ignition system (selection), in addition to check whether this big-end bearing becomes loose.
Six, in the engine cylinder wear later
After the piston cylinder wear, and the cooperation between increases, can cause oil, gas, compression pressure decrease agent, performance, serious when still can cause on cylinder piston and cylinder, piston, wear.
Seven, cylinder piston with clearance
Four stroke machine: 0.010 mm - 025mm o., Two-stroke machine: 0.015 mm ~ o. 030mm.
