OpticalDiagnosticsStudyontheEffectofMixturePreparationonSootFormationonaTurbochargedPortFuelInjectionSIEngine

OpticalDiagnosticsStudyontheEffectofMixturePreparationonSootFormationonaTurbochargedPortFuelInjectionSIEngine.pdf
WiththeLimitsandMeasurementMethodsforEmissionsfromLight-dutyVehicles(CHINA6)issued,theOEMsneedtomeetthenewlegislationinChinesemarketinthefuture.Forcost-sensitivemarketsegment,theturbochargedportfuelinjection(TPFI)SIengineisstillasuitableselection.InordertoreducethesootemissionsofTPFIenginesfurther,itisnecessarytounderstandthemixturepreparationprocess,combustionprocessandthesootformationmechanisms.Inthispaper,opticaldiagnosticswasusedtoobservechargemotion,mixingandcombustionprocessesofaTPFIengine,withopticalaccesstoboththeintakemanifoldandthecom-bustionchamber.Theresultsshowthatwallwettingandfuelfilmstripatomizationaswellasflowbackwereobservedinthefuel-airmix-ingprocessatpartialload,anditdidn'tcausesootemissionseriously.However,athighload,themixingqualityintheintakeportbe-comesunsatisfactory,spray-wallimpingementandwallwettingbecomeexacerbate,andthefuelfilmmotionanddepositionin-creased.Throughthein-cylindervisualization,it'sfoundthatalargenumberofliquidfueldropletsenterthecylinderwiththevalveopened,andthevalvegapandsparkpluggapareaaccumulatesalargenumberoffuelfilm.Whenthecombustionprocesscarriedout,diffusionflameswhichassociatedwithsootformationcanbeobserved.Thesootemissionmainlysourcedfromtheareaofvalveandsparkpluggap.
作者：LiuFafaTianBoTianYingxinLiQiShenHuixianZhanZhangsongLiWeijian
作者单位：PowertrainR&DInstitute,ChongqingChanganAutomobileCo.Ltd.
母体文献：第19届亚太汽车工程年会暨2017中国汽车工程学会年会论文集
会议名称：第19届亚太汽车工程年会暨2017中国汽车工程学会年会  
会议时间：2017年10月24日
会议地点：上海
主办单位：中国汽车工程学会
语种：chi
分类号：
关键词：mixturepreparation  sootformation  opticaldiagnostics  TPFIengine
在线出版日期：2020年7月9日
基金项目：
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OpticalDiagnosticsStudyontheEffectofMixturePreparationonSootFormationonaTurbochargedPortFuelInjectionSIEngine.pdf

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