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1、本科学生毕业论文车用乙醇汽油发动机性能研究二○○九年六月TheGraduationThesisforBachelor'sDegreeStudyonPerformanceofEthanol-gasolineEngineHeilongjiangInstituteofTechnology2009-06·Harbin黑龙江工程学院本科生毕业论文摘要我国是能源消耗的大国，发展乙醇在我国具有广阔前景。对乙醇汽油双燃料发动机性能的研究也是很有现实意义的。能源结构中低效、高污染能源占相当比重，高效清洁能源所占比例很小，这样的结构不仅造成能源的大量浪费
2、，而且对环境造成很大污染，偏离了世界能源结构发展趋势的主流。今后我国应加速优化能源结构，增加清洁能源和新能源的比重。本论文是在给定实验数据的情况下结合以往相关实验数据，对比研究了汽油机燃用乙醇汽油对发动机经济性、动力性和排放性,并对非常规排放进行了研究。研究表明,在部分负荷下,汽油机的功率和转矩都有所降低,但在全负荷时发动机的输出功率不变；燃油消耗率会增加5%～10%,发动机的经济区范围变窄。在燃料乙醇非常规排放方面，发现发动机燃用汽油、柴油或醇燃料时,排气中都会产生醛类排放物,随着混合燃料中的醇含量增加,排气中醛类排放物也相应增加,
3、汽油的甲醛排放要高于柴油；同一种燃料进行测试时,甲醛排放随着功率的增加呈先增大后减小的趋势；双三元催化转化器对甲醛有一定的催化作用。关键词：乙醇；清洁能源；替代能源；非常规排放；动力性II黑龙江工程学院本科生毕业论文ABSTRACTEnergyconsumptioninChinaisabigcountry,thedevelopmentofethanolhasbroadprospectsinChina.Ofethanolgasolinedual-fuelengineisalsousefulpropertiesofpracticalsig
4、nificance.Inefficientenergystructure,high-energyaccountforasignificantproportionofthepollution,theproportionofcleanenergyefficientisverysmall,thestructureofsuchalargenumberofnotonlyawasteofenergy,butalsocausegreatpollutiontotheenvironment,adeparturefromthedevelopmenttre
5、ndofworldenergystructureofthemainstream.Thefuture,Chinashouldacceleratetheoptimizationofenergystructure,cleanenergyandincreasetheproportionofnewenergysources.Thispaperistheexperimentaldatainagivencombinationofthepastcircumstancesrelatedtotheexperimentaldata,comparatives
6、tudyofthegasolineenginefueledwithethanolgasolineontheengineofeconomy,powerandemissions,andemissionsofnon-conventionalresearch.Studieshaveshownthatinsomeoftheload,thegasolineenginepowerandtorquearereduced,butinthefullloadoutputpowerwhentheenginehasremainedunchanged;fuelc
7、onsumptionratewillincrease5%~10%,enginenarrowingthescopeoftheeconomiczone.Non-fuelethanolintheemissionsandfoundthattheenginefueledwithgasoline,dieseloralcoholfuels,exhaustemissionswillhavealdehydes,withthemixedfueltoincreasethealcoholcontent,theexhaustemissionsofaldehyd
8、esisalsoacorrespondingincreaseingasolineformaldehydeemissionsthandieselfuel;withatestfuel,formaldehydeemission
