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:2004-07-2922420054:1006-9348(2005)04-0247-04MATLAB1,1,1,2(1.,400030;2.,400050):,,,,,MATLAB,,,:;;;;:U460:AComputerSimulationofPowerPerformanceandFuelEconomyforAutomobileBasedonMATLABXUZhong-ming1,ZHANGZhi-fei1,ZHUANGJian-bing1,WENLi2(1.CollegeofMechanicalEngineering,ChongqingUniversity,Chongqing400030,China;2.ChongqingIndustryPolytechnicCollege,Chongqing400050,China)ABSTRACT:Toautomobiles,thepowerperformanceandfueleconomyarethemaincharacterswhichdirectlyaffectitsperformanceinmarket.Thecomputersimulationofthepowerperformanceandfueleconomyforacarisnotonlyafast,exactandeffectivemethod,butiteliminatestheeffectfromdriver,roadandweatherinroadtest,sothecom2putersimulationcanberepeatedandcomparedmoreeasilythanroadtest.Accordingtotheminimumdoublemultipl2yingprincipleandlinearregressionmodel,theenginefull-loadperformancemodelandtheenginefuel-consump2tionperformancemodelareestablishedinthispaper.Basedonthepowerperformanceandfueleconomymathematicsmodels,theparametersensitivityformulaeofpowerperformanceandfueleconomyofautomobilearederived.ThecomputersimulatedprogramiscompiledinMATLAB.Thecomputersimulationofthepowerperformanceandfuele2conomyforacarisdone.Theresultsofcomputersimulationandroadtestaregiven.Atlast,theparametersensitivi2tyanalysisisdoneandsomewaysofimprovementarepointedout.KEYWORDS:Automobile;Powerperformance;Fueleconomy;Computersimulation,Sensitivityanalysis1,,,,,,,60,70,,[1][2][3][4],742©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,,(E-P),,,;,,,,,,MATLAB,MATLAB,,,,2,,2.1,,:Ttq=a0+a1n++aknk(1):n,r/min;Ttq,Nm;k,k=35k=42.2(),,,;,,,,,,:b=b(n,p)=i+2m=ii+2k=i7i+2j=in-njnk-njb(nj,pj)7i+2g=igmp-pgpm-pg(2),,,3,,[7]:Ft=Ff+Fw+Fi+FjTtqigi0Tr=Gf+CDA21.15u2a+Gi+mdudt(3):FtFfFwFiFj;Ttq;igi0;T(,0.95);r();G;f;CD;A;ua;i;;mdudt,F,:FtF=Fz(4):,0.70.8,0.753.1,,842©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=0,i=0,:uamax=21.15CDATtqigi0Tr-Gf(5)3.2,3.2.1,,:T=T0+2minG3.6[Ft-(Ff+Fw+a0Ft)]dV(6):T0,Vmin,a0(0),([1]),,,,3.2.2,:t1=Ga3.6g101Ft-(Ff+Fw+a0Ft)d(7):g;V0V13.3,:Ft-FwG=r=f+i(8)D=Ft-FwG:imax=tanmax=tanarcsinDImax-f1-D2Imax+f21+f2(9):max,DImaxI,f4(GB/T12545-90),4.1,t,[1],,Qq,Q1:Q1=Qq=gePe367.1t(mL)(10)4.2:Q2=Pege367.1t(11):Pe,gePe4.3,,,(),Qi,Q34.4,,Q4(mL):Q4=tQi(11):Qi,mL/s4.5ts(s),Q5(mL):Q5=Qits(12):Qi,mL/s4.6Qs(L/100km):Qs=Q100/s(13):Q,mL;s,m55.1:,:942©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=21.15CDATtqigi0Tr-Gf(14)GfCDAt,,G:SuamaxG=5uamax5GGuamax(15)5.2,,(11),4.1,Q1GfCDAt,,,GfCDAt,6,MATLAB,(1.3)6.11.3474Q(,)12:;1(km/h)(%)(0100km/h)(20120km/h)171.0034.75614.0638.97170.5035.01%14.146.23,:t,G,CDA,ftCDA,;240km/h60km/h90km/h(L/100km)3.903.404.783.836.305.518.764.853G-0.1261-1.15711.08651.1785f-0.1261-0.03250.05940.1310CDA-0.4565-0.000561740.07560.1798t0.58260.6631-1.1040-1.29044:,:t,f,G,CDAtG,,4(,60km/h)G0.09780.1954f0.10480.1954CDA0.06550.0308t-0.1634-0.22637,,,(254)052©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(k)=max{0,[Hmizi(k)-yimin(k)]+}(18)(13)-(18)(19)-(24):+i(k)0,-i(k)0(19)+i(k)--i(k)=Tiui(k)-i(k)(20)+zi(k)0,-zi(k)0(21)+zi(k)--zi(k)=yi(k)-zi(k)(22)+zmi(k)0,-zmi(k)0(23)+zmi(k)--zmi(k)=yimin(k)-Hmizi(k)(24),:J=Min{Mi=1Nk=1(aTixi(k)+bTi+i(k)+bTi-i(k)+cTiHi+zi(k)+cTiHi-zi(k)+dTiHmi+zi(k)+dTiHmi-zi(k))+Mi=1aTixi(N+1)}(25)s.t.(2)-(12),(19)-(24)4(M=4),15,(2,1,1),(2,1,1),(2,1,1),(1,1,1)2-3,2.0,2.31,1.76,1.05,1.76,1.14,1.44,1.44,0.93,1.36,1.61,1.36,1.89,1.60,2.102,1,2,2,2,2,2,1,1,2,2,1,1,2,2100,50,90,100,100,100,100,100,100,100,100,50,100,170,50,,(14,21,21),(21,21,21),(21,14,21),(14,21,14),1.7GHz,[3]459,59,,J=23.34635,,,,,,:[1]HSYan.Hierarchicalstochasticproductionplanningforthehigh2estbusinessbenefit[J].RoboticsandComputer-IntegratedMan2ufacturing,2001,17(5):405-419.[2],.[J].,2002,8(6):438-441.[3]HPWilliams,.[M].,1991-6.[](1957-),(),,,,,CAD(1973-),(),,(1957-),(),,,,CIMSFMS,(250)MATLAB,,,:[1],.[J].,1995,(1):58-63.[2],,.[J].,1995(1):32-38.[3],.[J].,1998(2):31-35.[4].[J].,2002(1):21-23.[5],.[J].,1994(1):20-22.[6]..[M].,2001-6.109-136.[7].(3)[M].,2000-9.1-50.[](1963.12-),(),,,,,,3,30(1983.6-),(),,,(1982.3-),(),,,(1965.3-),(),,,452©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.