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1、2016年(第38卷)第9期汽車工程AutomotiveEngineering2016(V01．38)No．92016164氫氣直噴與EGR協(xié)同作用對汽油機燃燒和排放的影響研究木于秀敏，吳海明，杜耀東，劉林，牛仁旭，董偉(吉林大學，汽車仿真與控制國家重點實驗室，長春130022)[摘要]為揭示氫氣對傳統(tǒng)燃料燃燒的改善作用，在一臺加裝EGR的氫氣缸內(nèi)直噴、汽油進氣道噴射的復合噴射火花點火雙燃料發(fā)動機上，開展了不同摻氫比和EGR率下發(fā)動機性能和排放的試驗研究：結果表明：EGR的引入會降低發(fā)動機轉矩，而摻氫可有效提高
2、發(fā)動機轉矩。有效燃油消耗率隨著EGR率的增大呈現(xiàn)先減小后增加的趨勢，摻氯可降低有效燃油消耗率，改善發(fā)動機經(jīng)濟性：缸壓峰值隨EGR率的增加呈現(xiàn)先增大后減小的趨勢，其對應的時刻推遲；隨著摻氯比的增加缸壓峰值增大，且出現(xiàn)的時刻提前。平均指示壓力循環(huán)變動系數(shù)隨EGR率的增加而增大，摻氫叮有效降低燃燒循環(huán)變動。汽油摻氫后NO。排放增加，EGR的引入能有效降低NO，排放，這種降低效果在大摻氫比下更顯著；HC和CO排放隨EGR率增大而增加，隨摻氧比的增加而降低在氯氣缸內(nèi)直噴與EGR協(xié)同作用下，發(fā)動機可獲得較好的綜合性能。關鍵
3、詞：汽油機；氫氣直噴；廢氣再循環(huán)；燃燒；排放AStudyontheCollaborationEffectsofHydrogenDirect—injectionandEGRontheCombustionandEmissionsofGasolineEngineYuXiumin，WuHaiming，DuYaodong，LiuLin，NiuRenxu＆DongWeiJilinUnit’ersit)，StateKe)l』tborator)ofAutomotit’eSimulation．ridControl，Changr’
4、hun130022[Abstract]Fm’revealingtheimprovementeffectsofhydrogenonthecombustionoftraditionalfuel，anex-perimentalstudyontheperformanceandemissionofacompoundfuelinjectionspark-ignitiondual·fuelengine(hy-drogenin—cylinderdirectinjectionandgasolineportinjection)wi
5、thexhaustgasreeir(·ulation(EGR)deviceunderdifferenthydrogenfractionsandEGRrates．TheresultsindicatethattheintroductionofEGRreducesenginetorqueandhydrogenadditioncaneffectivelyincreaseenginetorque．Effectivespecificfuelconsumptionshowsatrendofdeducingfirsttheni
6、ncreasingwiththeriseofEGRrate，butcanbeloweredbyhydrogenadditionwiththefuelecon．omyofengineimproved．WiththeincreaseofEGRrate，cylinderpressurepeakrisesfirstthenfalls，withcorre—spondingtimingretards．Thecyclicvariationcoefficientofmeanindictedpl’essureriseswitht
7、heincreaseofEGRrate，butcanbeeffectivelyloweredbyhydrogenaddition．Withhydrogenaddedintogasoline，theemissionofNO。increases，butwhichcanbeeffectivelyloweredbytheintroductionofEGR，beingmoreapparentinlargehydrogenfraction．TheemissionsofHCandCOincreasewiththeriseof
8、EGRbutdecreasewithhydrogenfraction．Tosumup，underthecollaborationofEGRandhydrogenin—cylinderdirectinjection，theenginecanachievebetteroverallperformance．Keywords：gasolineengine；hydrogendirect-inje
