The explicit causeof the piston globe fatigue mar caused by the operation manner of the enginerun-in duration and preservation of improper perpetuation actions. The maininfluencing factors are: Runnin.
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The absolute causeof the piston ring prostration blemish caused by the operation manner of the enginerun-in period and concervation of improper maintenance actions. The maininfluencing factors are: Running – in operation during the interval diesel enginein a long occasion in the high-speed load, or a hot car suddenly turn off state;hose between the air seep to the intake manifold, crisp circuit, so that thedust from entering the cylinder; plus Note lubricant bob does not meet therequirements, and serious pollution; poor sort fuel injector fuel injectionor use of poor fuel quality, diesel engines at low temperatures for a longtime; fuel supply propose element misalignment
1)features More of the top piston ball breakage and piston ring nick injury;piston globe outer exterior and the main the upper corrugated pull marks; pistonskirt and main upper fuser symbols of wear; gap often occurs in openingson both sides of the big Point district
2)reasons Direct factor to govern the piston sphere gap of the improperactions of mechanism use or perpetuation The principal influencing factors: the dieselengine for a wanting circumstance in the overheated state, causing the piston ring cardcylinder; use of lubricating oil viscosity is too large; piston orb matchingunreasonable or incorrect installation methods, to sway the piston orb stressconcentration; piston and tube with the gulf is too small; diesel long-termdeflagration conditions
1)features Piston sphere and piston circle mark niche a mound of sludge, coke, andglial-like sediment; piston circle outer facade presents a ladylike sheen and deeplongitudinal scratches; piston round flexibility and weak.
2)reasons Cause sticky rings is the unqualified prompt piston sphere sludge, cokebonding, as well as piston rings, cylinder deformation The principal influencingfactors are: piston rings, main serious hot deformation, the piston ringside clearance and backlash is too small, so that the sphere card can not be inthe round container activities; device overheating or long-term overload of work, sothat oil to effect colossal temperature glial; poor superiority of lubricating oil;poor quality fuel injector fuel injection; poor crankcase ventilationinstallation work, causing denial force or tube airtight poor causedoil Shangcuan; cylinder liners optional unreasonable or pressing impropercaused deformation.
1)features Smaller piston sphere upper and dilute final round incision wear, unilateralor uneven wear in the circumferential surface; the working surface of thepiston orb outer longitudinal scratches due to gum wear; the prime of thepiston globe and piston blowby traces
2)reasons The piston rings doctor to wear is a conclusive result of the piston in thecylinder due to malposition The main influencingauto dvdand car dvd playerfactors are: scarcity of dieselengine running operation after the new tool or overhaul; channel linerthermal deformation into the cylinder block and main action malposition; rodbent or twisted; crankshaft axial clearance is too large.
features Pistonrings unilateral or border surface longitudinal grooves; the contactsurface of a metal peel or scratch a large area; outside scratches and sticky ringphenomenon is often at the identical time