新能源汽车英语讲稿

Thedevelopmenttrendofautomobileindustryclean-energyvehiclePureElectricVehicleHybridElectricVehicleFuel-cellVehicleclean-energyvehicleNaturalgasandliquefiedpetroleumgasvehicleMethanol-fueledcarHydrogen-poweredVehicleClassificationPureElectricVehicleAsthenameimpliesthepureelectricvehiclesarethecarsuseelectricpower.Mostofthemuseelectricdirectly,alsohavesomeothersusefourwheelsasthefourmotors’rotors.Advantage:noexhaust,nopollution,technologyisrelativelysimpleandmature.Disadvantage:theenergystoredinthebatteryunitweighttoolittle,andthebattery’manufacturingcostistoohigh,someevenmoreexpensivethanthecar.DevelopmentStatusFuel-cellVehicleFuel-cellvehicleisthatcarusehydrogenorothersasfuel,throughthechemicalreactioncreateelectriccurrenttodrivethecar.Advantage:Fuel-cell’senergyconversionrateistwicetheinternalcombustionenergy,orevenhigher;thechemicalreactionprogressoffuel-celldoesnotproduceharmfulexhaust;runningsmoothly,nonoise,sothefuel-cellvehicleisakindofidealvehicle.Disadvantage:manufacturingcostistoohigh,currenttechnologyisdifficulttoachievetheindustrialized.Hydrogen-poweredVehicleBMWHydrogen7Hydrogen-poweredvehicleisatrulyzero-emissionvehicle,emissionsofpurewater,whichhasanon-polluting,zeroemission,isthebestalternativetoconventionalcar.Advantage:richsourceofhydrogen;theemissioniswater,nopollution.Disadvantage:Thehighmanufacturingcostofhydrogenfuelcells,andhydrogenfuelstorageandtransportinaccordancewiththetechnicalconditionsisverydifficult.NaturalgasandliquefiedpetroleumgasvehicleMostofthiskindofvehicleusedoublefuelsystem,namelyacompressednaturalgasorliquefiedpetroleumgassystems,andagasolineordieselcombustionsystems,caneasilytransitionfromonesystemtoanothersystem,thiscarismainlyusedforurbanpublictransportvehicles.Advantage:Gassinglecomponent,highpurity,uniformmixingwithairandburnedcompletely,COandparticulateemissionsarelow,theenginestartingatlowtemperatureandbetterrunningperformance.Disadvantage:Itstransportperformanceispoorthantheliquidfuel,lowvolumetricefficiencyoftheengine,theignitiondelayislongeranddynamicdecreased.Methanol-fueledcarMethanolvehiclesismethanolastheprimaryfuelvehicles,butalsousegasolineorgasoline-alcoholmixedfuelasfuel,canbeconvertedbytheaveragecar.Advantage:completecombustion,lowvolatility,emissionsofhydrocarbons,nitrogenoxidesandcarbonmonoxideandotherharmfulgaseslittle.Disadvantage:Itslowerenergywithalmostthesamedistancetwicethangasolineconsumption,whichrequiresalargetank.Hybridelectricvehiclereferstothoseusingconventionalfuels,butwiththemotor/enginetoimprovepoweroutputandlowfuelconsumptionofthevehicle.Advantage:becauseofthebattery,youcanveryeasilyrecoverbraking,downhill,idleenergy;whenbatterydrivenindividually,toachieve"zero"emissions.Disadvantage:Mainlyrelyonfossilfuels,it’sjusttheproductsofthetransitionalperiodofnewenergyautomotive.HybridElectricVehicleProblem1.Batterytechnologyisnotmatureenough,cartravelingashortdistancewiththebattery,ifaddthebattery,theweightofcarwillincrease,theefficiencywilldecline.2.Largecurrentdischargeeasilyresultthebatteryheating,causingthebatterytoburn.3.Shortcircuitthebatterypronetoexplosion4.Batterychargingtimeistoolong.SummaryToday,energyshortages,environmentalpollutionisgettingworse.cleanenergyvehicleshavebecomethetrendofthefuturedevelopmentoftheautomotiveindustry.Butthetechnologyisnotverymature.Therearesomeproblemsinsecurity,fast-charging,declinethecost,increasingthebatterycapacity.此课件下载可自行编辑修改，此课件供参考！部分来源于网络，如有侵权请与我联系删除！