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外文翻译--汽车传动带技术最新进展.doc

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外文翻译--汽车传动带技术最新进展.doc

英文原文CARSDRIVEWITHTHELATESTTECHNOLOGYPROGRESSAUTOMOTIVETRANSMISSIONBELTISTHEIMPORTANTAUTOMOTIVEENGINEPARTS,TRANSMISSIONBELTISANIMPORTANTCOMPONENTITCANBESAIDTHATTHETRANSMISSIONBELTOFMANYTECHNOLOGICALADVANCESANDINVENTIONS,ANDISCLOSELYRELATEDTOTHEDEVELOPMENTOFAUTOMOBILEINDUSTRY,SUCHASTHEVBELTINVENTION,TRIMMINGVBELT,MULTIWEDGEBELTANDSYNCHRONOUSBELTOFRAPIDDEVELOPMENT,HYDROGENATEDNITRILERUBBERHNBRUSEDINSYNCHRONOUSBELT,EPDMRUBBEREPDMAPPLIEDMULTIWEDGEBELT,WHICHARETHELATESTTECHNOLOGYINORDERTOMEETREQUIREMENTSOFTHEAUTOMOBILEINDUSTRYWASDEVELOPINGRAPIDLYINRECENTYEARS,DUETOGLOBALWARMING,ENVIRONMENTALPROTECTIONANDCOMFORTREQUIREMENTSOFTHEAUTOMOTIVE,ENERGY,EMISSIONSANDNVHNOISE,VIBRATIONANDSMOOTHISTHEMAINTOPICOFTHEAUTOINDUSTRYHOWTOIMPROVEFUELEFFICIENCYANDREDUCEEMISSIONS,IMPROVETHEMAINTENANCECYCLEHASBEENAGOALOFTHEAUTOMOBILEINDUSTRYRESEARCH,INCLUDINGMULTIVALVETECHNOLOGYMULTIVALVEENGINES,MVESANDVARIABLEMUNVARIABLEVALVETIMING,VVTTECHNOLOGY,CATALYTICCONVERTERS,42VPOWERGENERATION/STARTERMOTORINTEGRATIONINTEGRATEDSTARTERALTERNATOR,ISA,DIDIESELENGINESAND240,000KMOR300,000KMMAINTENANCECYCLETHESETECHNOLOGICALADVANCESINTHEAUTOPARTSALSOACORRESPONDINGINCREASEINPERFORMANCEREQUIREMENTSANDHARSH,AUTOMOTIVETRANSMISSIONBELTISNOEXCEPTIONINORDERTOADAPTTOTHESECHANGES,ANDSOMEFOREIGNFAMOUSTRANSMISSIONBELTDRIVEWITHTHECARMANUFACTURERSCONDUCTEDMANYIMPROVEMENTANDPERFORMANCEIMPROVEMENTPROFILEMULTIWEDGEBELTTRIMMINGTOOTHPROFILEMULTIWEDGEBELTSIMILARTOTHEVBELT,ORINTHEWEDGEPROFILEOFTHEPIECESTOENHANCEBELTANDBELTFLEXIBLETHERMALPERFORMANCECANBESIGNIFICANTLYIMPROVEDWITHLIFEGOODYEARSTUDYSHOWEDTHATTHESAMECHLOROPRENERUBBERCRMATERIALSMULTIWEDGEBELT,HIGHTEMPERATUREFATIGUETESTORDINARYMULTIWEDGEBELT66H,ATOOTHMULTIWEDGEBELTUPTO167HOURSATOOTHMULTIWEDGEBELTCANREDUCETHEACCURACYOFTHEBELTASSEMBLYREQUIREMENTSBUTTOOTHMULTIWEDGEBELTINUSETHROUGHTHEPULLEYWILLBRINGOUTINTOTHEAIRFLOW,FLOWGENERATEDRHYTHMICSOUNDGOODYEARCOMPANYTHROUGHHELICAL,ULTRAHIGHDAYCOCAUSINGIRREGULARTEETHCOMPANIESTOOFFSETSUCHVOICESCANBEREDUCEDBYABOUT15DBNOISEABOUTTHETWOCOMPANIESWEREGATORHARKANDPOLYCOGMARKINGTOMARKETFLOCKINGMULTIWEDGEBELTMULTIWEDGEBELTDRIVETRANSMISSIONNOISEISONEOFDEFECTSLARGER,LOWSPEEDORVELOCITYCHANGESINTHEUSEOFQUICK,ANDAFTERSOMETIME,WEDGEWEAR,ANDTHETENSIONRELAXATIONSCLEROSIS,ORONRAINYDAYSDIPTOWATER,THETRANSMISSIONWOULDBEGIVENHARSHSCREAM,AFFECTINGVEHICLENVHPERFORMANCEONESOLUTIONISWEDGELEFT0110MMHIGHINTENSITYSHORTFIBERSUCHASARAMID,PBOFIBER,ETCBECAUSEFIBERFRICTIONCOEFFICIENTSTABILITY,ASOUNDABSORBINGFUNCTION,THEREFOREGREATLYREDUCEDMULTIWEDGEBELTTRANSMISSIONNOISEFLOCKINGMULTIWEDGEBELTGENERALWITHSPECIALGRINDINGPROCESSTOACHIEVELAPPING,THEFIRSTWEDGEFASTGROUNDINTOABROADWEDGE,ANDTHENSLOWWETGRINDING,RUBBERMILLSWAP,WEDGEEXPOSEDCERTAINLENGTHOFTHEFIBERFLEXIBILITYMULTIWEDGEBELTINRECENTYEARS,SMALLFAMILYCARINORDERTOSIMPLIFYTHEENGINEFRONTWHEELDRIVEANNEXSTRUCTURESHAVEBEGUNTOUSEFLEXIBLEMULTIWEDGEBELTSDRIVENBYBELTFLEXIBILITYMULTIWEDGEBELTGENERALUSEELONGATIONATBREAKTHAN20PERCENTOFHIGHTWISTNYLONFIBERASASTRONGLAYERCORDULTRAHIGH,THEMAINLANDCONTITECHPRODUCTIONOFAUTOMOTIVEFLEXIBLEMULTIWEDGEBELTALLEGEDLYLIFEHASREACHED150,000KMEPDMMULTIWEDGEBELTINRECENTYEARS,THEENGINEROOMTEMPERATUREGETTINGHIGHERANDHIGHER,ANDSOMEREQUIRERUBBERPIECESCAPABILITYOF150C,ANDINSTANTLYTHECAPABILITY170℃,THETRADITIONALCHLOROPRENERUBBERCROBVIOUSLYNOTREQUESTASHNBRTOOEXPENSIVE,PEOPLEINTHESTUDYFOUNDTHATASMALLAMOUNTOFENGINEOILISNOTONTHEFRONTOFTHEBELT,CAUSINGDAMAGE,CANUSETHECHEAPERGOODTHERMALSTABILITYOFEPDMRUBBEREPDMRUBBERASMULTIWEDGEBELTMAINMATERIALBUTEPDMWEARRESISTANCE,HIGHTEMPERATUREANDTHEDYNAMICPERFORMANCEOFSLITTINGRESISTANTUNSATISFACTORY,POORADHESIONWITHOTHERMATERIALS,THESEALLREQUIREMODIFICATIONSUCHASADDINGORZDMAANDZDAANDOTHERMATERIALSUSEDTOSOLVETHEPROBLEMEPDMMULTIWEDGEBELTHIGHTEMPERATUREPERFORMANCEANDHIGHTEMPERATUREFATIGUELIFEMARKEDLYIMPROVED,SUCHASCRMULTIWEDGEBELT107CUNDERTHEFATIGUELIFEOFONLY50HOURS,ANDEPDMMULTIWEDGEBELTAT121CUNDERTHEFATIGUELIFEOFUPTO125HOURSTHEDEVELOPMENTOFTHEEPDMMULTIWEDGEBELTLIFEHASREACHED240000KMSHORTFIBERREINFORCEDBELTSINCE1975HNBRANNOUNCEMENTOFTHEFIRSTPATENTS,HNBRISBECOMINGTODAYSWORLDCARPRODUCTIONPREFERREDSTANDARDSYNCHRONOUSBELTELASTOMERMATERIALJAPANHONDACOMPANIESIN1985THEFIRSTPRODUCTIONOFHNBREQUIPPEDWITHASUBSTRATEFORTHEPRODUCTIONOFANEWTYPEOFAUTOMOBILETRANSMISSIONBELTGERMANYBWMHADALSOADOPTEDIN1997BYTHEJAPANESEIMPORTSINTOEUROPEHNBRSYNCHRONOUSBELTANDTHEFIRSTDECORATIONHNBRSYNCHRONOUSBELTWITHTHECARMANUFACTURERSINTHELATE1990S,THERAPIDDEVELOPMENTOFTHEWORLDAUTOMOBILEINDUSTRY,THEINTENSEMARKETCOMPETITION,AUTOMOBILEMANUFACTURERSMAINLANDCOMPANIESHNBR/ZMAANDSHORTFIBERWITHKEVLARMANUFACTURINGHSNPOWERLIFEHNBRSYNCHRONOUSBELTUSEINTHEGASOLINEENGINE,THEIRLIFEEXPECTANCYHASMORETHAN240,000KM,WITHCLOSETOTHEENGINEWITHLIFEHAVETRIEDEVERYMEANSTOMAXIMIZEEXTENDEDTHROUGHCAMSHAFTDRIVEBELTTOIMPROVETHELIFEOFTHECARSENGINEPERFORMANCE,ATPRESENT,ALMOSTALLOFTHEWORLDSAUTOMANUFACTURERSHAVEBROUGHTABOUTTHROUGHTHEINTRODUCTIONOFAUTOHNBRSYNCHRONIZATIONOFPRODUCTQUALITYPRACTICESHOWSTHAT,INGENERALDRIVINGCONDITIONSHNBRSYNCHRONOUSBELTOFWORKINGLIFEUPTO100000150000KMMODERNCARSONTHESYNCHRONOUSBELTREQUIREMENTISLIFEOF250000300000KM;USETEMPERATURE35150,INSTANTANEOUSTEMPERATURECANREACH175;OILRESISTANCEOF≥CR;150℃STEPDOWNUPTO3000HLIFE,BUTALSOINENHANCINGOILRESISTANCEITSPERFORMANCEATLOWTEMPERATUREWITHOUTSACRIFICINGPERFORMANCE,WITHTEETHDYNAMICSTORAGEMODULUSOF≥14MPATOACHIEVESUCHAHIGH,ANDONLYTHEUSEOFPEROXIDECURINGHNBR/ZINCMETHACRYLATEZMACOMPLEXESANDARAMIDSHORTFIBERREINFORCEDCOMPOSITEMATERIALSMAINLANDCOMPANIESHNBR/ZMAANDSHORTFIBERWITHKEVLARMANUFACTURINGHSNPOWERLIFEHNBRSYNCHRONOUSBELTUSEINTHEGASOLINEENGINE,THEIRLIFEEXPECTANCYHASMORETHAN240,000KM,ANDHASBEENCLOSETOTHEENGINEWITHLIFEACLOTHBELTBACKAUTOMOBILEMANUFACTURINGPROCESSSYNCHRONOUSBELTDUETOTHERESTRICTIONS,WITHTHEBACKAREGENERALLYPURERUBBER,ASITISUSEDINTHEAUTOMOTIVEBELTBACKATTHESAMETIMELEADTOOTHERCOMPONENTSSUCHASPUMPSANDTENSIONINSTITUTIONS,INPARTICULARTHEDIDIESELENGINESREQUIRESALOTOFTENSION,SOWEARONTHEBACKOFVERYLARGE,PURERUBBERUNABLETOMEETTHEREQUIREMENTIFTHERESULTWILLBRINGBACKACLOTH,CANBEGREATLYENHANCEDWITHTHEBACKWEARABILITYIFTHEMAINLANDSCONTIDIESELRUNNERISSUCHASYNCHRONOUSBELTSTRUCTUREOILRESISTANCESYNCHRONOUSBELTSINCETHE1960S,THEUNITEDSTATESGMWILLBETHEFIRSTTIMETHESYNCHRONOUSBELTFORTHENEWROOFSTANDARDCAMOHCENGINEREPLACEMENTOFTHEORIGINALUSEOFBALLCHAIN,ASYNCHRONOUSBELTASAGOODPERFORMANCE,NOISE,WITHOUTLUBRICATION,LIGHTWEIGHTLOWCOSTANDEASYMAINTENANCE,ANDMANYOTHERADVANTAGES,INTHECARSENGINEPROMPTLYWHENTHEDRIVEISUSED,PARTICULARLYSMALLDISPLACEMENTENGINES,ACCOUNTINGFORALMOSTONEHUNDREDPERCENTBUTTHENEWCENTURY,ASMODERNCARENGINESTRENGTHENTHECONTINUOUSIMPROVEMENTOFTHEDEGREE,PLUSSTRICTEMISSIONSREGULATIONSCONSTANTLY,CONSTANTLYEXTENDEDMAINTENANCECYCLE240000KMOR300000KM,WHENTHEDRIVEISINCREASINGTHELOADONTHEALLOCATIONOFGASISACCURACYTHEREAREINCREASINGLYHIGHREQUIREMENTS,SYNCHRONOUSBELTHASBEENINCREASINGLYDIFFICULTTOMEETTHEMODERNCARENGINEHARSHDEMANDS,COUPLEDWITHTHEIMPROVEMENTOFTECHNOLOGYARECHAINSUCHASSTRENGTH,WEARRESISTANCE,NOISEREDUCTIONANDOPTIMIZATIONOFDESIGN,CHAINTHEMSELVESTOOVERCOMETHESHORTCOMINGSHIGHLIGHTEDHIGHPOWERTRANSMISSIONCHAIN,THENEEDTOSAFEGUARDANDHEATRESISTANCE,OILRESISTANCE,ANDOTHERINHERENTADVANTAGES,INRECENTYEARSWHENTHECARENGINEISATRANSMISSIONMECHANISMTENDTOUSECHAINTRENDINORDERTOCOMPETEWITHTHECHAIN,THEDRIVEBELTINRECENTYEARSFOREIGN

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