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The direct causeof the piston ring fatigue damage caused by the operation mode of the enginerun-in period and maintenance of improper maintenance actions. The maininfluencing factors are: Running - in operation during the period diesel enginein a long time in the high-speed load, or a hot car suddenly turn off state;hose between the air filter to the intake manifold, short circuit, so that thedust from entering the cylinder; plus Note lubricant model does not meet therequirements, and serious pollution; poor quality fuel injector fuel injectionor use of poor fuel quality, diesel engines at low temperatures for a longtime; fuel supply advance angle misalignment. 1)features. More of the first piston ring breakage and piston ring groove injury;piston ring outer face and the cylinder the upper corrugated pull marks; pistonskirt and cylinder upper fuser signs of wear; fracture often occurs in openingson both sides of the high Point district. 2)reasons. Direct factor to cause the piston ring fracture of the improperactions of engine use or maintenance. The main influencing factors: the dieselengine for a long time in the overheated state, causing the piston ring cardcylinder; use of lubricating oil viscosity is too large; piston ring matchingunreasonable or incorrect installation methods, to cause the piston ring stressconcentration; piston and cylinder with the gap is too small; diesel long-termdeflagration conditions. 1)features. Piston ring and piston ring groove place a lot of sludge, coke, andglial-like sediment; piston ring outer face presents a polished sheen and deeplongitudinal scratches; piston ring flexibility and weak. 2)reasons. Cause sticky rings is the direct cause piston ring sludge, cokebonding, as well as piston rings, cylinder deformation. The main influencingfactors are: piston rings, cylinder serious hot deformation, the piston ringside clearance and backlash is too small, so that the ring card can not be inthe ring tank activities; engine overheating or long-term overload of work, sothat oil to produce high temperature glial; poor quality of lubricating oil;poor quality fuel injector fuel injection; poor crankcase ventilationinstallation work, causing negative pressure or cylinder airtight poor causedoil Shangcuan; cylinder liners optional unreasonable or pressing impropercaused deformation. 1)features. Smaller piston ring upper and lower end ring groove wear, unilateralor uneven wear in the circumferential surface; the working surface of thepiston ring outer longitudinal scratches due to adhesive wear; the top of thepiston ring and piston blowby traces. 2)reasons. The piston rings tend to wear is a direct result of the piston in thecylinder due to malposition. The main influencing auto dvdand car dvd player factors are: lack of dieselengine running operation after the new machine or overhaul; cylinder linerthermal deformation into the cylinder block and cylinder suit malposition; rodbent or twisted; crankshaft axial clearance is too large.features. Pistonrings unilateral or circumference surface longitudinal grooves; the contactsurface of a metal peel or scratch a large area; face scratches and sticky ringphenomenon is often at the same time.
How,run,series,automotive,beau