资源描述：
《点燃式lpg发动机暖机过程的排放特性与优化控制研究》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、点燃式LPG发动机暖机过程的排放特性与优化控制研究第24卷(2006)第3期内燃机!TransactionsofCSICEVo1.24(2006)No.3Articlelid:1000—0909(2006)03一o2O6一O9EmissionCharacteristicsandOptimizingControlduringWarm-upinanLPGSIEngineLIUZhi-min,LILi.guang,DENGBao-qing(1.InstituteofInternalCombustionEngine,ShanghaiJiaotongUni
2、versity,Shanghai200030,China;2.AutomobileSchool,TongjiUniversity,Shanghai201804,China;3.DepartmentofInternalCombustionEngine,JilinUniversity,Changchun130025,China)24_()36Abstract:,I1lecharacteristicsofHCandCOemissionsduringwarln—upandtheircontrollingstrategieswereexperi—menta
3、llyinvestigatedina125cmsingle—cylinderLPGsparkignitionengine.MeasurementsonHCandCOemissionsbeforeandafterThree—Way-Catalyticconverter(TWC)wereconducted.ThetotalemissionsaftertheIWCandtheconversionefficiencyofIWCwerecalculated.Thefluctuationoftheidlingspeedwascontrolledwithin-
4、4-25r/rainthroughadjustingtheignitionadvanceangle.Theeffectsofdifferentidlingspeedsandthrottleopeningsonthetotale-missionsandTWCconversionefficiencywereobtained.耶1estudyshowedthattheoptimalidlingspeedwas1500r/rainandtheoptimalthrottleopeningwasl1.5.f0rachievingthelowestemissi
5、onsduringwarm—up.Keywords:Warm—up;LPG;Idlingspeed;ThrottleopeningCLCnumber:TK417Documentcode:A点燃式LPG发动机暖机过程的排放特性与优化控制研究刘志敏,李理光,邓宝清(1.上海交通大学内燃机研究所,上海200030;2.同济大学汽车学院,上海201804;3.吉林大学内燃机系,吉林长春130025)摘要:介绍了冷起动暖机过程中HC和CO排放特性及其控制策略的研究.试验在一台单缸四行程125CELPG电控喷射点燃式发动机上进行.通过对三效催化器前后HC和C
6、O浓度的测最,计算出相应排放的转换效率.基于点火提前角的调整控制,使怠速转速控制在±25r/min.研究了不同怠速转速和节气门开启角度对总排放和转化效率的影响,结果发现,本试验样机暖机阶段排放最优控制的怠速转速为1500r/rain,节气门开启角度是11.5..关键词:暖机;LPG;怠速转速;节气门开度IntroductionReductionsofhydmc~bon(HC)andcarbonmonoxide(CO)emissionsduringwarm—uphavebeeninvestigatedexperimentallyforasmallS
7、park—Ignition(SI)engine.ThefuellingfortheenginewascontrolledbyElectronicFuelInjection(EFI)andthefuelwasLiquefiedPetroleumGas(LPG).BasedontheestimatesfromthefI'P一75fFederalTestProcedure),HCemissionsduringwarm-upatcold—startforgasolineengineswithTWCarealmost80%ofthetotalcycles[
8、一.Therefore,emissionsduringcold—-startandwarm—-upcandeterminewheth--
