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1(133)No11(serialNo1133)20092MODERNVEHICLEPOWERFeb12009:1671-5446(2009)01-0001-0531,1,2,3(1.,130011;2.,130025;3.,213000):,,,CA4SH2N,YRK24G,,:;;:TK464:AResearchonEmissionControlStrategyofCNGEngineforChinaStageIVEmissionStandardGB176912005XIEYun2chen1,NIUDan2feng1,YANGLi2ping2,WANGMing31.FAWJiefangAutomotiveCo.LTD.,Changchun130011,China;2.JilinUniversity,Changchun130025,China;3.ChangzhouYirenEnvironmentalTechnologyCo.LTD.,Changzhou213000,China)Abstract:InordertomakeCNGenginemeetGB176912005(IV),thispaperanalyzedtheexhaustformingmechanismofCNG,settleddownthetechnicalsolutionofutilizinghighprecisionelectroniccontrol,optimizedcombustionandafter2treatment.WithallthesemethodsandspecialdesignedYRK24GTWCcatalyst,theCA4SH2NCNGenginewasdeveloped,whichhasgoodemissioncontroleffectsandmeettheGB176912005(IV)emissionlevel.Keywords:CNGengine;catalyst;emissionapproach(83%99%),CO2,,,,,[1],,CO50%;NOx30%;HC40%,HC90%,;SO270%;CO223%,/3394kJ/m3,/3839kJ/m3,,20%,GB179612005()(),1,3:2008-11-25:(1964-),,,,,,863CNG,,,:863CNG(20060111A1085),,1[2],,,CO,NOx,HC31/kgm-3//MJkg-1/kJm-3(RON)()/%/cms-1()/()/71510-3-16117.019.7149.81339413051631.518756307307007803019014.81858510143.98383958961835.047.021972304701.1CO,:2CH4+3O22CO+4H2OCO+O2CO2+OCO+OHCO2+H,CO,,,CO;,CO,CO,CO,,25,,CO,,,CO1.2NOxNOxNO,NO2,N2O,NO3,N2O3,N2O4,N2O5NONOx99%,1%NO:,O2O,N2,N,ON2NON,NO2NOO,ONO2N2,O2N2,,NO,NO,,NO,NO,NO,,NO,,NO1.3HC,HCCH4CH3,CH2O,CHO,CH490%HC,HC,,,,,,CH4,,,,HC,,,,HC22,;2,2,,220091,;,,,,,CA4SH2N2.1,,,,2,,,,,,,CA4SH2N,,,,,,CA4SH2N2.1.1,,180r/min,(ECU),,,600r/min,,,,,,,2.1.2,,3[3]:a.;b.,,,;c.,,,,,,,,10%,,,,,,,2.1.3,,,,,,,,,320091,:,,,,,,,,,,2.22.2.1,,[4],CA4SH2N,,352,,,20.78m/s,366,,,,36654.5%,,130,,[5],10.51210,,,11102.2.2,31.5cm/s,,,,CFDCA4SH2N,352,41mJ,5.722mm,,,,160mJ15.675mm,40mJ3,120mJCH4,,,,,,,40mJ80mJ8,9.6%,80mJ120mJ3,6.2%(1)120mJ,,NOx(2),,,CA4SH2N120mJ12.3,HC(CH4),420091HC,,:CO+O2CO2(1)CH4+O2CO2+H2O(2)NOx+COCO2+N2(3)NOx+CH4CO2+H2O+N2(4)NOx+H2H2O+N2(5)CO+H2OCO2+H2(6)CH4+H2OCO2+H2O+N2(7)2NOx(CH4)4CH:CH4CH3+HD(CH3H)=435.1kJ/molCH3CH2+HD(CH2H)=443.5kJ/molCH2CH+HD(CHH)=443.5kJ/molCHC+HD(CH)=338.9kJ/molCH415.3kJ/mol,(C4C12)CC(345.6kJ/mol)20%;,CH4,,537,390420,,(2);,CH4NOx(3)HCNOx,NOx,:a.,Pt/RhPt/Pd/Rh,,,,2,CH4NOx,,,,b.,(400170mm)c.,,,d.,3CA4SH2N,YRK24G,,,NOx3,3,,GB179612005(),23NOx(54)520091,:RI:0F(),F,600ms1.46,44/rmin-1/()4000.35001.77504.29505.411005.7,5172LabviewVISA,,,:[1].()[M].:,2002.(5)2CA4SH2NETC/g(kWh)-1/g(kWh)-1CO4.002.290NMHC0.550.002CH41.100.920NOx3.503.040:GB179612005(IV)4:a.,;b.;c.CA4SH2N,,:[1].[J].,1999,(01):11217.[2],.[J].,1998,15(4):152181[3].LPG[D]1:,2004.[4],.[J].(),2007,(06):1257212621[5],1CA6SH2NE3[J]1,2009,(01):1822214520091