The talk to causeof the piston field fatigue broken caused by the operation mode of the enginerun-in mature and grant of improper money actions. The maininfluencing factors are: Runnin...
The take up causeof the piston ring fatigue damage caused by the operation mode of the enginerun-in become old and keep of unsuitable allowance actions. The maininfluencing factors are: organization - in operation during the grow old diesel enginein a long epoch in the high-speed load, or a warm car quickly approach off state;hose with the air filter to the intake manifold, brusque circuit, suitably that thedust from entering the cylinder; benefit Note lubricant model does not meet therequirements, and loud pollution; needy air fuel injector fuel injectionor use of needy fuel quality, diesel engines at low temperatures for a longtime; fuel supply help angle misalignment.
1)features. More of the first piston ring breakage and piston dome groove injury;piston auditorium outer approach and the cylinder the upper corrugated pull marks; pistonskirt and cylinder upper fuser signs of wear; rupture often occurs in openingson both sides of the tall point district.
2)reasons. dispatch factor to cause the piston pitch fracture of the improperactions of engine use or maintenance. The main influencing factors: the dieselengine for a long get older in the overheated state, causing the piston pitch cardcylinder; use of lubricating oil viscosity is too large; piston showground matchingunreasonable or incorrect installation methods, to cause the piston auditorium stressconcentration; piston and cylinder gone the gap is too small; diesel long-termdeflagration conditions.
1)features. Piston pitch and piston ring groove place a lot of sludge, coke, andglial-like sediment; piston pitch outer slant presents a polished sheen and deeplongitudinal scratches; piston ground flexibility and weak.
2)reasons. Cause sticky rings is the focus on cause piston ring sludge, cokebonding, as capably as piston rings, cylinder deformation. The main influencingfactors are: piston rings, cylinder colossal warm deformation, the piston ringside clearance and backlash is too small, so that the ground card can not be inthe showground tank activities; engine overheating or long-term overload of work, sothat oil to develop high temperature glial; poor air of lubricating oil;poor environment fuel injector fuel injection; needy crankcase ventilationinstallation work, causing negative pressure or cylinder airtight needy causedoil Shangcuan; cylinder liners optional unreasonable or pressing impropercaused deformation.
1)features. Smaller piston arena upper and lower stop field groove wear, unilateralor uneven wear in the circumferential surface; the working surface of thepiston sports ground outer longitudinal scratches due to adhesive wear; the summit of thepiston sports ground and piston blowby traces.
2)reasons. The piston rings tend to wear is a tackle repercussion of the piston in thecylinder due to malposition. The main influencingauto dvdand car dvd playerfactors are: want of dieselengine dealing out operation after the extra machine or overhaul; cylinder linerthermal deformation into the cylinder block and cylinder engagement 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 scrape a large area; incline scratches and sticky ringphenomenon is often at the similar time.
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