電噴汽油機不同燃料冷起動及冷態(tài)循環(huán)燃燒及排放特性研究.pdf

1、天津大學碩士學位論文電噴汽油機不同燃料冷起動及冷態(tài)循環(huán)燃燒及排放特性研究姓名：宋璽娟申請學位級別：碩士專業(yè)：動力機械及工程指導教師：胡春明20070601AbstractAStheautomobileproducingandsellingprogressedrapidlyrecentlyinChina，pollutioncausedbyCaremissionhasbecomeaserioussocialprobleminournatio

2、nMeanwhile，withhumanbeinggettingincreasinglyconsciousnessofenvironmentproblem，theresearchofinternalcombustionengineisfocusingonenvironmentbenefitssuchasfuelconsumption，emissions，noiseandSO011ThedetailsasfoIllows：1Multi—c

3、hanneltransientSIenginecombustionanalyzerhasbeendevelopedPressureinsidecylinder中aandexhaustemissionscanbemeasuredbythisanalyzerThethermalcirculationchangesarecalculatedthroughhtnumericalanalysis2Anelectroniccontrolrapidb

4、urningsystemwithhigh—energydualsparkplugignitionsystemisdevelopedcreativelyincludingmodifiedcylinderhead，twoindependentlyadjustablehi曲一energy—ignitionsystemsSynchronizingandasynchronousignitiontimingCallberealizedbyECUan

5、dcontrolstrategyaccordingtoengineoperationcondition3StudyOncoldstartburningcharacteristicsandanalyzethemainfactorsaffectingtheburningandHCemissions，suchasinjectionpulsewidth，ignitiontiminganddifferentignitionmodes4Resear

6、chonburningandemissioncharacteristicsatwarmingupprocessTestonthereasonsofignitiontiminganddifferentignitionmodesforcombustionstabilityandHCemissionsatwarmingupprocess5ComparisonthecoldstartperformancesatLPG，gasolineandke