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1、Thedevelopmenttrendofautomobileindustryclean-energyvehicleDevelopmentStatusClassificationProblemsSummaryPureElectricVehicleHybridElectricVehicleFuel-cellVehicleclean-energyvehicleNaturalgasandliquefiedpetroleumgasvehicleMethanol-fueledcarHydrogen-powe
2、redVehicleClassificationPureElectricVehicleAsthenameimpliesthepureelectricvehiclesarethecarsuseelectricpower.Mostofthemuseelectricdirectly,alsohavesomeothersusefourwheelsasthefourmotors’rotors.Advantage:noexhaust,nopollution,technologyisrelativelysimp
3、leandmature.Disadvantage:theenergystoredinthebatteryunitweighttoolittle,andthebattery’manufacturingcostistoohigh,someevenmoreexpensivethanthecar.DevelopmentStatusFuel-cellVehicleFuel-cellvehicleisthatcarusehydrogenorothersasfuel,throughthechemicalreac
4、tioncreateelectriccurrenttodrivethecar.Advantage:Fuel-cell’senergyconversionrateistwicetheinternalcombustionenergy,orevenhigher;thechemicalreactionprogressoffuel-celldoesnotproduceharmfulexhaust;runningsmoothly,nonoise,sothefuel-cellvehicleisakindofid
5、ealvehicle.Disadvantage:manufacturingcostistoohigh,currenttechnologyisdifficulttoachievetheindustrialized.Hydrogen-poweredVehicleBMWHydrogen7Hydrogen-poweredvehicleisatrulyzero-emissionvehicle,emissionsofpurewater,whichhasanon-polluting,zeroemission,i
6、sthebestalternativetoconventionalcar.Advantage:richsourceofhydrogen;theemissioniswater,nopollution.Disadvantage:Thehighmanufacturingcostofhydrogenfuelcells,andhydrogenfuelstorageandtransportinaccordancewiththetechnicalconditionsisverydifficult.Natural
7、gasandliquefiedpetroleumgasvehicleMostofthiskindofvehicleusedoublefuelsystem,namelyacompressednaturalgasorliquefiedpetroleumgassystems,andagasolineordieselcombustionsystems,caneasilytransitionfromonesystemtoanothersystem,thiscarismainlyusedforurbanpub
8、lictransportvehicles.Advantage:Gassinglecomponent,highpurity,uniformmixingwithairandburnedcompletely,COandparticulateemissionsarelow,theenginestartingatlowtemperatureandbetterrunningperformance.Disadvantage:Itstransportperformanceispoorthanthe
