搜索
©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Q20013):2002-09-1920920039:1006-9348(2003)09-0039-041,2,1(1.,200030;2.,200050):MATLAB/SIMULINK,,:;;;:TP271+.62;U270:A1,,MATLAB/SIMULINK,,2:,11,,,;,;,,3,,,,3.1,(ÛQrej)[1]:ÛQrejµNfuelingNcylÛMfuelQLHVµNfuelingNcylÛMair1A/FcomQLHV(1):ÛQrejµNfuelingNcylÛMair1StoicQLHV(2):ÛQec=ÛTeoutmeCc=ÛQrej-ÛQeair-ÛQrair(3)ÛQeair=eAe(Tec-Teair)(4),Ncyl,NfuelingA/F,QLHV,ÛMfuel,ÛQec,ÛQrair,Cc,me,e,Ae,Tec,Teair,3.2,():(tlag)(Thyst,1.7),,,[2](2),:TeoutTstatmax,Ath=0.793©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=0TstatminTeoutTstatmax,:Ath=0.7Teout-TstatminTstatmax-Tstatmin(5)TstatminTengoutTstatmax,:Ath=0.7Teout-(Tstatmin+Thyst)Tstatmax-Tstatmin(6):Ath,Tstatmin,Tstatmin23.3:ÛQ=CrÛMr(Trin-Trout)=CaÛMa(Traout-Train)=rArT(7):ra,inout,ÛM,C,T,r,Ar,,,,-T[3]:T=(Trout-Train)-(Trin-Traout)log[(Trout-Train)/(Trin-Traout)](8),,,:mrinTrin+(mr+mrin)Tr0=mrTrout(9)mrin=t0ÛMrdt(10):Tr0,mrint,mr3.4:ÛMc=GpumpRPM(11):Gpump,RPMÛMr=AthermostatÛMc,ÛMbyp=(1-Athermostat)ÛMc(12):ÛMcTein=ÛMrTradout+ÛMbypTeout(13):ÛMc,ÛMbpy,,33.5,,:ÛMaCa(T2-T1)=ÛQintair(14):ÛMaCa(T3-T21)=ÛQrair(15):ÛMaCa(T5-T4)=ÛQeair(16):ÛQintair,T1=T2,T2=T3,T3=T3=T4,T1,3.6,,,(1),(ta=15)10(m/s)Trout804(m/s)80Trout876(m/s)Trout874C200,[4],04©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()25252525()25252525()839383939187(rpm)1800180012001200(m/s)30/3.6=8.3330/3.6=8.3380/3.6=22.2280/3.6=22.22(kg/s)3.083.41.711.71(kg)(/)12.3/1512.3/1512.3/1512.3/15(m2)0.640.340.640.34(Kw/S)7275.2(7581.9)=7775.65()86.086.587.087.5()7581.981.7(7581.9)=7775.65()(2557.9)=43.544(2557.9)=3045()(50100)=65(5569)=62(50100)=76(61.578.5)=706,7,67,8914©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:[1]InKwangYoo,KennethSimpson,MyronBellandStephenMajkowski.Anenginecoolanttemperaturemodelandapplicationforcoolingsystemdiagnosis[C].SAEpaper2000-01-0939.[2]OnerArici,JohnH.Johnson,AjeyJ.Kulkarni,Thevehicleenginecoolingsystemsimulationpart1-modeldevelopment[C].SAEpaper1999-01-0240.[3].[M]..1995.[4]ChadLehneretal.Designanddevelopmentofamodelbasedfeedbackcontrolledcoolingsystemforheavydutydieseltruckapplicationsusingavehicleenginecoolingsystemsimulation[C].SAEpaper,2001-01-0336.[](1977.6-),(),,,,;(1974.3-),(),,,;(1956-),(),,,,ANumericalModellingandSimulationforTruckEngineCoolingSystemXIAOCheng-yong1,LIJian2,ZANGJian-wu1(1.SchoolofMechanicalEngineering,ShanghaiJiaotongUniversity,Shanghai200030,China;2.DaimlerChryslerSIMTech.Co.Ltd.,Shanghai200050,China)ABSTRACT:Inthispaper,anumericalcoolingsystemmodeloftheheavytruckengineisdevelopedintheMATLAB/SIMULINKenviron2ment.Engine,thermostat,radiator,pumpandtheairpassageareincludedinthemodel.Nonlinearcharacteristicsofthermallagandtimede2layofthermostatareconsidered.Accordingly,controllawforcoolingfanspeedmodulationbasedonSTATEFLWOisestablished.Thebasica2greementofsimulationresultsandthoseobtainedfromtherealtestindifferentworkingconditionshowsthatthismodelprovidesagoodpredica2tionofthecoolanttemperature.KEYWORDS:Dieselenginecoolingsystem;Modeling;Simulation;Hysterisis24