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附录专业英语翻译STUDYOFDRYTHINWALLCYLINDERLINERFORDIESELENGINECYLINDERBLOCKBOREANDCYLINDERBOREMACHININGFIRSTCHAPTEROUTLINE11AIRCYLINDERSATTRITIONJUDGESTHEENGINEWHETHERNEEDSTHEOVERHAUL,MAINLYISDECIDEDBYTHEAIRCYLINDERWEARINGCAPACITY,THEAIRCYLINDERAIRRAMGROUPATTRITIONHASHASTHEGRINDINGCOMPOUNDTOWEAR,THEMOLECULAR□MACHINERYWEARS,CORRODESTHECHARACTERISTICWHICHTHEMACHINERYWEARSINAIRCYLINDERWORKINGCONDITIONBADTEMPERATUREHIGH,PRESSUREHIGH,IFOILFEEDINSUFFICIENCYORLUBRICATIONCONDITIONBAD,ISEASYTOFORMTHEBOUNDARYFRICTION,CAUSESDONOTSELECTHASTHEMETALLICCONTACT,FORMSTHEADHERENCYTHEHOTADHERENCYREPAIRSAVEHICLETHEINITIALPERIODOPERATIONALPHASEINNEWCHEHEDATOBEEASYTOPRODUCEINORDERTORESISTTHEHOTADHERENCY,MUSTENHANCETHECOMPONENTSTHEMANUFACTUREANDTHEASSEMBLYQUALITYANDTHELUBRICATINGOILQUALITYTHECYLINDERBODYIFCOORDINATESTHEPISTONCURL,INTHEATTRITIONQUESTIONISANINALIENABLEWHOLE,TWOHASDENSECUTSRELATIONGENERALLYBESIDESSPECIALMATERIAL,INTWOKINDOFMUTUALCOMPOUNDINGINGREDIENTSONEKIND,IFWEARINGCAPACITYSMALLSPEECH,THENANOTHERKINDOFMATERIALWEARINGCAPACITYALSOREDUCESALONGWITHITTIMETHEENGINECYLINDERBODYMANUFACTUREPRECISIONANDTHEASSEMBLYSHAPEPOSITIONCOMMONDIFFERENCEISREMARKABLETOTHECYLINDERWALLATTRITIONINFLUENCEINTHEMANUFACTUREANDTHEOVERHAULARETHESTRICTCONTROLANDTHEINSPECTIONAIRCYLINDERANDTHEMAINAXLEALTARHOLESPOOLTHREADVERTICALITY,THEAIRCYLINDERHOLETOTHEMAINBEARINGHOLESITE,HASTHEGREATSIGNIFICANCETOTHEENGINESERVICELIFETHECYLINDERWALLATTRITIONEXPERIMENTPROVEDTHAT,WHENVERTICALITYERRORINCREASESTOABOVE010MMWHENBY005MM,THECYLINDERWALLWEARSCORRESPONDINGLYINCREASES3040；CYLINDERHOLECOLUMNERRORACHIEVEDWHEN004MM,AFTEREXERCISES20,000KILOMETERS,ACYLINDERHOLECOLUMNERRORINCREASESTO010MM012MMWHENANINITIALCOLUMNERRORISSMALLERTHAN0025MM,AFTERMOVES20,000KILOMETERS,ACYLINDERHOLECOLUMNERRORONLYINCREASES005MM006MM12CYLINDERWALLSSURFACESAPPEARANCETHECYLINDERWALLFORMSTHEOVERLAPPINGSHAPEGROOVEBYTOIMPROVERUBSTHEVICELUBRICATIONCONDITIONISREDUCESTHEATTRITIONTHEIMPORTANTLINKEVENGOESAGAINSTTHENETGRAINHONINGTOBEPOSSIBLETOCAUSETHECYLINDERWALLSURFACETOPRESENTTHECLEARLYDISCERNIBLEOVERLAPPINGNETGRAINTRENCH,ANDGROOVECRESTHONINGHASTHEMICROSCOPICPLANE,CAUSESTHEFLATTOPPINGAREATOACCOUNTFORTHETOTALAREAABOUT60,LIKETHISMAYENHANCETHECYLINDERWALLTHEOILSTORAGEABILITY,CAUSESTHECYLINDERWALLTHEWEARINGCAPACITYTOCOMPARETHENONFLATTOPPINGNETWORKGRAINHONINGTHECYLINDERTUBETOREDUCEABOUT78THEUSEINDICATEDTHAT,CARRIESONTHEFLATTOPTHENETGRAINHONING,AFTERTHEENGINEEXERCISES100,000KILOMETERS,STILLOBVIOUSLYNETGRAINTRENCHTHECYLINDERWALLPROCESSINGQUALITYTOITSATTRITIONINFLUENCEREMARKABLE,THEROUGHSURFACEISEASYTODESTROYTHELUBRICANTFILMCONTINUITY；ISNOTEASYINTHESMOOTHSURFACETOPRESERVETHELUBRICATINGOILUNDERTHECERTAINWORKINGCONDITION,THEAIRCYLINDERWEARINGCAPACITYIFISROUGHHASTHECERTAINRELATIONS,THEREFOREMUSTREASONABLYCHOOSETHESURFACEROUGHNESSTHEMATERIALINDICATED,FORPREVENTEDPULLSTHECYLINDER,BYALLMEANSMUSTTHEMAINTENANCELUBRICANTFILM,THECYLINDERWALLANDTHEPISTONCURLSURFACEROUGHNESSMUSTFULLYCONTROLTHEJAPANESEMATERIALBELIEVED,CYLINDERWALLSURFACEROUGHNESSTAKE03MUMASSUITABLE,ITSSUPERFICIALHONINGTRACESHOULDFORMTHEOILSTORAGESURFACETHEFRENCHMATERIALBELIEVED,REGARDINGTHELINEARPRECISIONWORK,SHOULDUSE05125MUMTHEROUGHNESSREGARDINGINDUSTRYINAPPLICATIONMODELCASTIRON,THECYLINDERWALLSURFACEDONOTHAVETOOTOBESMOOTH,OTHERWISECANHINDERTOWEARIN；BUTTHETOOROUGHSURFACECANCAUSETHEATTRITIONINCREASETHEREFOREUSUALLYTAKESBETWEEN0510MUM,AFTERWEARSIN,SURFACEROUGHNESSBETWEEN012015MUMTHEMODERNMOTORCARENGINETAKESINTHECYLINDERTUBEEXTREMELYINTHEENHANCEMENTWEARRESISTINGLIFEASPECTTHEGRINDINGCOMPOUNDATTRITIONEXPERIMENTALTABLEBRIGHT,THECYLINDERWALLTOTALWEARINGCAPACITYONEABOUTTHEHALFISTHEGRINDINGCOMPOUNDWEARSTOELIMINATESENHANCESTHEENGINETHEFILTRATIONSYSTEMFUNCTIONOUTSIDE,INTHEASSEMBLYLINESHIPSOUTTHEENGINEUSUALLYHASTHEMASSIVEGRINDINGCOMPOUNDGRANULE,ISWEARINGINTHEINITIALPERIOD,CAUSESTHEATTRITIONSHARPGROWTHTHEMATERIALINDICATEDTHAT,THEENGINEINSTALLSTOTHEAUTOMOBILEON,ATFIRSTIN100200KILOMETERTRAVELLINGSCHEDULE,INLUBRICATINGOILCONTAINSTHESILICONQUANTITYTOBEMOSTTHEREFOREDOESWELLTHEENGINE清洁度,TOGUARANTEESTHEENGINEQUALITY,THERELIABILITYALLHASTHESIGNIFICANCESIGNIFICANCE13CYLINDERBODIESDISTORTIONSTHECYLINDERBODYPOSSIBLYAPPEARSVARIOUSDISTORTIONINTHEUSE,BRINGSEXTREMELYBADLYTOTHEENGINESERVICELIFEINFLUENCETHECYLINDERBODYDISTORTSTHEREASONUSUALLYHASTHREENAMELYINTERNALSTRESS,OUTSIDELOADANDTEMPERATUREWASMADTHECYLINDERBODYHASBEENMAKINGINTHEREGULATIONSHANGNENGGUARANTEEDTHECORRECTPOSITIONANDTHESHAPEBETWEENTHEMATINGSURFACEBUTPASSESTHROUGHPERIODOFTIMEAFTERMAKINGONTHEPRODUCTIONDOESNOTCONFORMTOTHESPECIFICATIONTODISTORTGREATLY,ITSMAINREASONISBECAUSEHASNOTCARRIEDONEFFECTIVEACTUALEFFECTPROCESSINGTOTHECASTINGORTHEACTUALEFFECTPROCESSESISIMPROPERINADDITION,ISMADTHECYLINDERBODYAFTERTHEROUGHMACHININGFORCECUTTING,ALSOCANHAVETHEPROCESSINGINTERNALSTRESS,ALSOMUSTINCARRYONATIMEOFACTUALEFFECTPROCESSING,OTHERWISEWILLBEABLETOHAVETHEDISTORTIONINTHELATERUSEPROCESSINRECENTYEARSININTHEOVERSEASRESEARCHCOMPONENTSDISTORTIONMECHANISMLITERATUREPROPOSEDSOMEVIEWS,NAMELYTHOUGHTHASTHEDISTORTIONINTRINSICREASONISTHEMATERIALCRYSTALLIZATIONFLAW,LIKEVACANCY,DISLOCATION,ALONGCRYSTALGRAINFLAW,HOLEANDOTHERSUNDRYGOODSANDSOONESPECIALLYMAYBETHEDISLOCATIONANDITSTHEPROLIFERATIONARETHEMAINREASONWHICHTHEINFLUENCEDISTORTS14AIRCYLINDERSANDPISTONTOLERANCECLEARANCESTHEAIRCYLINDERANDTHEPISTONTOLERANCECLEARANCEWITHIMPORTANTLYAFFECTSTOTHEENGINESERVICELIFE,ITISTHEDESIGN,THEMANUFACTUREWITHUSESONEOFENGINEIMPORTANTPARAMETERSBELIEVEDGENERALLYTHAT,THEASSEMBLYINITIALGAPGATHERSTHERUNNINGINGAPTOBESMALLER,COORDINATESTHEVICELIFETOBELONGERTHESMALLINITIALGAPONLYTHENTHROUGHTHEENHANCEMENTPROCESSINGPRECISION,REDUCESTHESHAPEPOSITIONCOMMONDIFFERENCE,THEIMPROVEMENTPISTONSTRUCTUREANDTHEMATERIALCANACHIEVEGAPEXCESSIVELYSMALL,ISNOTEASYTOGUARANTEETHELUBRICANTFILM,INCREASEDTHEATTRITION,EVENPULLSTHECYLINDERGAPOVERSIZED,THEENGINEEXPLOSIONPRESSUREDROPS,THEPISTONPINESPACIOUS,LATERALSWINGSENLARGES,ISEASYTOCAUSEKNOCKS
