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1、附录附录A：LOWROLLINGRESISTANCETIRESAccordingtothereport,80%ormoreofacar’sfuelenergyiswastedbyfrictionandothersuchlosses.1.5to4.5%oftotalgasolineusecouldbesavedifallreplacementtiresinusehadlowrollingresistance.About237millionreplacementtiresaresoldintheU.S.eachyear–nonehasrollingresistancelabeli
2、ng.1.America’sFuelUse,ItsImpacts,andOpportunitiesforSavingsTheenvironmentalimpactsofAmerica’sgasolineuseareprofound.Withover160millionpassengercarsandlighttrucksontheroad,weburnabout126billiongallonsofgasolineperyear.Ourfuelusecontinuestoriseabout3%annually,propelledbycontinuedincreasesinto
3、talnumberofvehicles,risingaveragedistancedrivenpercar,andfallingaveragefueleconomy.Today,light-dutyvehicles(cars&lighttrucks)areresponsibleforabout20%ofthenitrogenoxides,27%ofthevolatileorganiccompounds,51%ofthecarbonmonoxide,androughly30%ofallthecarbondioxide(themaingreenhousegas)emittedfr
4、omhumanactivitiesnationwide.Risingfuelusealsohasenormousimplicationsforprotectionofwildernessandpubliclands(vulnerabletoincreased14exploration),waterresources(vulnerabletotankerandpipelineaccidents),andnationalsecurity.Sotheopportunitytosavemoneyandimproveenvironmentalqualitythroughfueluser
5、eductionsisclear.Oneofthemostpromisingopportunitiesforfuelsavingsacrosstheentirefleetofexistingvehiclesistoutilizelowrollingresistancetiresinsteadofstandardreplacementmodels.Thischangeimprovestheinherentefficiencyofthevehicle,automaticallysavingfueloverthetypical30,000to50,000milelifetimeof
6、asetoftires.Thisreportexaminestheopportunityforsavinggasolinethroughuseofimprovedtiretechnologyandrecommendsparticulartiremodelsforwhichourinitialtestdatasuggestenvironmentaladvantages.Itsfindingsareapplicabletogovernmentandcorporatefleetmanagersaswellasindividualtirebuyers.2.HowTiresCanRed
7、uceFuelConsumptionAccordingtotheNationalAcademyofSciences,about80to88%oftheenergyinavehicle’sgasolinetankiswastedinvariousthermal,frictional,andstandbylossesintheengineandexhaustsystem.Thisleavesonlyabout12to20%ofthepotentialenergyactuallyconvertedtovehi
