资源描述：
《汽车的排量（automobile displacement）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、汽车的排量（Automobiledisplacement）Thedisplacementofacarreferstothesumofthecapacityofallthecylindersoftheengine.Forexample,acarenginehas4cylinders,eachcylindercapacityis0.5L,thentheenginedisplacementis0.5L*4=2.0L.Oracarenginehas6cylinders,eachcylindercapacityof0.6L,thenth
2、eenginedisplacementis0.6L*6=3.6L.Weoftenseethecar'senginedisplacementisaboutthefollowing:0.8,1.1,1.3,1.5,1.6,1.7,1.8,2,2.3,2.4,2.5,2.7,2.8,3.5,4,4.2,4.5,5,6,andsoon,,1.4,,3,etc..Ingeneral,thecarenginesinglecylindercapacityisabout0.5Lorso,inotherwords,thegeneral1.6-2
3、.0enginewith4cylinders,3have6cylinders,4have8cylinders,andthe5is10cylinder,6cylinderwith12(butnotnecessarily).Intheory,theenginedisplacementislarger,thepowerandtorquewillbegreater.Butnotnecessarily,thekeyistoseemanufacturersadjusttheengine.Forexample,insomehighperfo
4、rmanceofcarbody,itneedslargepowerengine,bigpoweristhatitcanrunfast,sothecarfactorywilladjusttotheenginepowerandtorquewillbegreatloss.AndiftheSUV,itdoesnotneedtorunfast,butneedalotofforce(torque)topullthecar,sothecarfactorywilladjusttotheenginetorqueislarge,butsomelo
5、ssofpower.Forexample,anenginedisplacementis4.0L,usedinthehighperformanceofcarbody,hispoweris350KW,torqueis300NM,butifusedinoff-roadvehicle,hemaybeadjustingthesuccessrateof280KW,whilethetorquebecomes450NM.Thesizeofthecar'sdisplacementisrelatedtothespeedandspeedofthec
6、ar.Alsorelatedtothecar'sfuelconsumptionproblems.Generallyspeaking,thelargerthedisplacement,thegreaterthefuelconsumption.Butinfact,itisnotnecessarilyproportional.Thekeyistocarryitreasonably.Forexample,acar,themostreasonableistocarry2oftheengine,thenyoucarry1.6oftheen
7、gine,willbemorethan2ofthefuelconsumption,carrying3willbemorethan2ofthefuelconsumption.Thecylinderarrangementoftheengineisapproximatelythefollowing,straight,horizontallyopposed,Vtype,Wtype,etc.Straightlineisarelativelysimplestructure,lowcost,smallsize,generallyusedin
8、ordinarycars.V6ismorecomplex,morethanV8ofthestructureisverycomplex,thecostisveryhigh,generallyusedinhigh-gradecars.W12cangenerallybeconsid
