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1、第52卷V01．52第10期No．10農(nóng)業(yè)裝備與車輛工程AGRICULTURALEQUIPMENT&VEHICLEENGINEERING2014年10月0ctober2014doi：10．3969d．issn．1673—3142．2014．10．003換氣相位對(duì)渦輪增壓汽油機(jī)爆震的影響祖英利1，胡宗杰2，李理光2(1．201209上海市上海第二工業(yè)大學(xué)；2．201804上海市同濟(jì)大學(xué)汽車學(xué)院)[摘要]針對(duì)小型化增壓發(fā)動(dòng)機(jī)急需解決的爆震和早燃問(wèn)題，在一臺(tái)2．0L渦輪增壓直噴汽油機(jī)上，對(duì)中等負(fù)荷進(jìn)排氣相位及大負(fù)荷進(jìn)排氣相位對(duì)發(fā)動(dòng)機(jī)爆震的影響進(jìn)
2、行了實(shí)驗(yàn)研究，介紹了實(shí)驗(yàn)裝置及研究方法，并得出結(jié)論，為改善小型化高壓縮比增壓直噴汽油機(jī)的性能提供參考。[關(guān)鍵詞]直噴汽油機(jī)；爆震；進(jìn)排氣相位；重疊角；掃氣[中圖分類-號(hào)-]U469．72[文獻(xiàn)標(biāo)志碼]A[文章編號(hào)]1673—3142(2014)10—0010—05TheCamTimingEffectsonKnockPerformancewithaTurboChargerGasolineEngineZuYinglil，HuZongjie2，LiLiguan92(1．SecondPolytechnicUniversity，Shanghai20
3、1209，China；2．CollegeofAutomotiveStudies，TongjiUniversity，Shanghai201804，China．)[Abstract]Basedona2．0LSIDIturbochargergasolineengine，theknockpedbmlancewasstudiedatdifterentenginespeedsandloads．Thetestresultsshowthat：whenintakecanlphasingwasretarded，theknockperfbmlancewasim
4、provedduetotheloweftectivecompressionratio，independenceofenginespeedsandloads．Withthefurtherretardingofintakecanlphasing，thehotin—cylinderairwaspushedbackintointakemanifoldwiththelateintakevalveclosing．Itwillreducetheknockperfomlanceimprovenmntbyloweftectivecompressionrat
5、io．Fordifterentengineloads，theincreasingvalveoverlapwillMtecttheinternalresiduallevelandtheknockperfommnce．Atmiddleload，theinletairpressureislowerthantheexhaustairpressure．Theincreasingvalveoverlapwillincreasetheinternalresiduallevel，whichnlaketheknockperfommnceworse．Atlo
6、wenginespeedandhighload，theinletairpressureishigherthanexhaustpressureforturbochargerengine．Thepositiveairscavengingreducetheinternalresiduallevelwhichimprovetheknockperfommnce．Themixturetemperatureattheendofcompressionatteettheengineknocksignificantly．Whentheinter—cooler
7、outlettemperaturechangedfi'OIn30。Cto80。C．thecon'esponding50％inaSSbumdurationcrankangleatknocklimitation(CA50)wasretardedby6。CA．Forlowspeedandhighload，retardingtheintakecanlphasingorincreasingvalveoverlapwillimproveknockperfommnce．However，therequirementofboostpressureratio
8、ishighforretardingintakecanlphasing．Anlinorboostratioisrequiredforhighvalveoverlap．[Keywords]SID
