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1、AutomobileEngineLubricatingSystemandMaintenanceLubricationsystem:Engine,transmissionpartsaremanysmallgaptestimonyphaseLiuspeedmovement,suchasthecrankshaftmainjournalandmainbearings,crankpinandconnectingrodbearings,camshaftjournalsandcambearings,pistons,pistonring
2、sandcylinderwall,gasdistributionandtransmissiondeputysportsbodiesandothergearpair.Althoughtheworkingsurfaceofthesepartshavebeenfineprocessing,butmagnifiedviewofthesesurfacesisuneven.Enginemovementandtherelativemovementofthepartsinthework,theworksurfaceinahighspee
3、dmovingstate,andsomepartsarestillunderalargeloadofwork(suchascrankshaftorcamshaftbearings,pistonsandcylinderwall,andtheductvalve,holdorrockercam,etc.)Therefore,theworksurfacemustbelubricated.Whateverpartssurfacemachiningaccuracyhigh,mustbeintwopartsofthefrictions
4、urfaceismaintainedbetweenalayerofoilfilm,inordertoreducethewearandtearpartsandpowerconsumption.Ifnotforthelubricationcancausedryfriction.Dryfrictionresistanceisverybig,notonlycausingtheincreaseofenginepowerconsumption,stillcanmakepartswearspeed,shortenservicelife
5、.Moreseriously,whenduetodryfrictionheatisverybig,canmakethepartstemperatureriserapidlyinashorttime,destroythefitclearance,makeexerciseamovement,afurtherriseintemperatureinsurfacemeltingandgelling,causeseriousenginemechanicalaccidentevenscrapped.Compositionlubrica
6、tionsystem:Mainoilcylinderhead,pistonpins,connectingrodsoilchannel,crankshaftoilpassages,oilpump,crankpinjournalcrankshaftmainjournal,etc.Themainfunctionsofthelubricationsystem:1.Lubrication:canmaketheengineinternalmotionsbetweenthesurfaceofthepartsdryfrictionint
7、oliquidfriction,reducingfrictionandwearonthesurfaceofthepartsandpowerloss.2.Cooling:lubricatingoilthroughthefrictionsurface,takeawaytheheatgeneratedbythefrictionpair,maintainpartsnormalworkingtemperature.93.Cleaning:useoflubricatingoilflushingpartssurface,takeawa
8、ythepartsofweardebrisandotherimpurities.4.Seal:useoflubricatingoilviscosity,adhesionbetweeneachotherusingthesurfaceoftheparts,improvetheeffectoftheclearancesea
