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Unit9Lesson35CleanMachines,Isyourcarclean?,阳光教学资源网搜集,仅供学习和研究使用!,Whatismostimportant,ifyouliveinabigmoderncity?Manywouldanswerthecar.Youwillfinditdifficulttogotoworkormovewithoutacar.Moreandmorefamilieshavetheirowncarsinordertomakelifemoreconvenient,buthaveyoueverthoughtaboutwhatwouldhappentothecity?,Themore,thebetter?,Testyourknowledgeaboutcars.,Areyouinterestedincars?Ifso,howmanydifferenttypesofcarshaveyouseenoryouknowabout?Talkaboutcarsinyourgroup.,Talkaboutthecaryouknowbestinyourgroup.ThefollowingquestionsandthekeywordsinExercise2areforyourreference.,Whattypeofcarareyougoingtotalkabout?Whatdoyouthinkisthemostimportanttoacar?Whatarethemainkindsoffuelusedforcars?Isthefuelusedforthecaryouaretalkingaboutfavorable?Whatstheproblemwiththefuelnow?,Haveyougotanyideatoimproveacar?Speakitoutandshareitwithyourfriends.,Lookatthefollowingpicture.Whatsit?,Haveyoueverheardofasolarcar?Readtheinterview.Maybeyouwillfindsomethingspecial.,Asolarcar,Readtheinterviewtolearnaboutthesolarcarracingandremembertocollectinformation.,Acarwhichusessunsenergyforpower.,Whyarepeopleinterestedinsolarcars?,Atuniversity.,HowmanyraceshasMarieLogantakenpartin?,ItranacrossthewholeofAustraliafromNorthtoSouth.,Howlongdidtheracetake?,BuildinganewcarwithateamfromQueenslandUniversity.,Writingabookaboutsolarcars,Whatsthemainproblemwithsolarcars?,Theyaretoosloworunreliable.,Whatdoyouthinkofthesolarracingcar?Wouldyouliketohaveatrytodesignoneofyourown?Improveyourformerdesign.,Describeyourdesignofanewcartoyourfriendsandlistentotheirsuggestions.,Ifyouarereallyinterestedinsolarcarracing,readmoreaboutsolarcarracing.,ExtensiveReading,Whatisasolarcar?,SolarCar,Asolarcarisalightweight,lowpowervehicledesignedandbuiltwithasinglepurposeinmind-racing(orraycing,acombinationofraceandrayfromthesun).,SimilartoanIndyorFormulaOneracecars,solarcarsdonotrepresentapracticalmeansoftransportation.Theyhavelimitedseating(usuallyone,sometimestwopeople),theyhaveverylittlecargocapacity,andtheycanonlybedrivenduringtheday.Theydo,however,offeranexcellentopportunitytodevelopfuturetechnologiesthatcanbeappliedtopracticalapplications.,SolarvehiclesrepresentingfivecollegeteamsleftCalState-SacramentoonTuesdaymorningatthestartofasix-day,670-mileracetoLosAngeles.TheyreachedStanfordviaVallejo,theSanFrancisco-OaklandBayBridge,afoggySanFranciscoandHighway280.,Readtolearnaboutsolarcarracing.,Solarcarraceswereledacrossthefirst-dayfinishlinebytheWesternWashingtonUniversitysVikingXX,asleekcarunderaslantedarrayofsolarcellslikearoofofshinybluetile.TheViking,whichreachedStanfordwithanelapseddrivingtimeof4hours,27minutes,placedfifthinternationallyintheWorldSolarChallengeinAustralialastNovember.,Thecarsarepoweredbythesun,buttheraceitselfispoweredbytheorganizationanddedicationofcollegestudents.ItstartedwiththeStanfordSolarCarProject,aloosecollectionof40orsostudentswhohavesofarbuilttwosolarcarswithalittlefacultyadviceandalotofhardwork.GraduatestudentDaveCaditzspearheadedtheideaofaracethatwouldzig-zagacrossCaliforniaandinspirethepublicsinterestinalternative-poweredvehicles.,TheAmericanSolarChallenge,TheAmericanSolarChallenge(ASC)isacompetitiontodesign,buildandraycesolar-poweredcarsinacross-countryevent.,In2005therewillbeaspecialeditionofASC,the2005NorthAmericanSolarChallenge.TeamswillcompeteinasolarvehicleraycefromUnitedStatesthroughCanada!,HowtoDesignaSolarCar,Ifyouareinterestedinsolarcarracing,pleasereadthefollowingtolearnhowtodesignasolarcar.,DesigningandBuildingaSolarCar,Readandlearnhowtomakeasolarcar.Designingandbuildingasolarcarisanenormousprojectthatcantakeuptotwoyearstocomplete.,EnergyFlowforaSolarCar,Energyflowdiagramforasolarcar,Thesunlighthitsthecellsofthesolararray,whichproducesanelectricalcurrent.Theenergy(current)cantraveltothebatteriesforstorage,godirectlytothemotorcontroller,oracombinationofboth.Theenergysenttothecontrollerisusedtopowerthemotorthatturnsthewheelandmakesthecarmove.,DriverControls,Solarcarsdohavesomeofthestandardfeaturesfoundinconventionalcars,suchasturnsignals(front&rear),brakelights,accelerator(gaspedal),rearviewmirrors,freshairventilation,andusuallycruisecontrol.,ElectricalSystem,Theheartofasolarcaristheelectricalsystemwhichismadeupofbatteriesandpowerelectronics.Theelectricalsystemcontrolsandmanagesallthepowerthatentersandexitsthesystem,DriveTrain,Thedrivetrainwillconsistoftheelectricmotorandthemeansbywhichthemotorspoweristransmittedtothewheelcausingthevehicletomove.,MechanicalSystems,Theyaredesignedtominimizefrictionandweightwhilemaintainingthestrengthneededtohandlethevariousroadconditions.,SolarArray,The
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