摘要随着国民经济的持续高速发展，能源危机与环境污染问题日益突出。因此，发展清洁代用燃料对于我国减少对进口原油的依赖和减轻环境污染具有十分重要的战略意义。本文从能源短缺与环境污染的角度出发，说明发展代用燃料的必要性。充分说明醇类代用燃料是极具潜力的一种清洁代用燃料,从物质本身的结构和性能出发阐述其成为清洁代用燃料的可行性。结合使用背景和相关实验参数，说明甲醇汽油对发动机功率、扭矩、燃油消耗率等性能和常规排放物CO、HC、NOx的影响并进行论证分析。除此之外也阐述了甲醇柴油的优缺点，对它的负荷特性和常规排放物HC、NOx、颗粒物等进行了分析，从而进一步说明甲醇是一种值得去开发研究的清洁代用燃料。本文还对乙醇进行了一定的介绍，从乙醇的基本物理化学性质分析其成为清洁代用燃料的可行性。说明乙醇汽油、乙醇柴油的使用情况，它们所具有的优缺点和目前在使用上存在的一些问题及相关改进方法。最后对清洁气体燃料——二甲醚做了相应的简介，根据它的相关性能特点说明它也是一种很有潜力的清洁代用燃料。关键词：汽车；代用燃料；甲醇；乙醇---本文于网络，仅供参考，勿照抄，如有侵权请联系删除------本文于网络，仅供参考，勿照抄，如有侵权请联系删除---AbstractWiththehigh-speeddevelopmentofnationaleconomy,theenergycrisisandenvironmentalpollutionproblemshavebecomeincreasinglyprominent.So,itisveryimportanttodevelopcleanalternativefuelstoreducedependenceonimportedoilandreduceenvironmentalpollution.Thisthesisillustratethenecessityofdevelopingcleanalternativefuelsaccordingtoenergyshortageandenvironmentalpollution.Fullyexplainsthefactthatalcoholalternativefuelsisofgreatpotentialasacleanalternativefuel,explainingitsfeasibilitytobecleanalternativefuelsfromtheangleoffromthestructureandthepropertiesofalcohol.illustratestheinfluenceofmethanolgasolineonenginepower,torque,fuelconsumptionandregularemissionsofCO,HC,NOxfromthebackgroundandexperimentaldataandthengivingaanalysis.Inaddition,italsodescribestheadvantagesanddisadvantagesofmethanoldiesel,andtheloadcharacteristicsandregularemissionsofHC,NOx,psareanalyzedtofurtherillustratethatmethanolisaworthyofresearchtobecleanalternativefuels.Thispaperalsointroducesethamol,andanalyzesthefeasibilitytobecleanalternativefuelsfromfromthebasicphysicalandchemicalpropertiesofethanol.Giveausagedescriptionofethanolgasoline,ethanoldiesel,illustratetheadvantageanddisadvantageandproblemsincurrentuse,andthengivesomerelatedimprovedmethods.Atlast,thereisabreifintroductionofairfuelsDME,andshowthatitisalsoapromisingcleanalternativefuelsaccordingtoitscharacteristic.Keywords:Automobile；Alternativefuel；Methanol；ethanol---本文于网络，仅供参考，勿照抄，如有侵权请联系删除---目录绪论.................................................................................................................................................................11汽车，石油与环境...................................................................................................................................21.1中国及世界汽车保有量概况.......................................................................................................21.2中国和世界石油概况...................................................................................................................21.3机动车排放污染...........................................................................................................................32汽车代用清洁燃料的提出与意义..........................................................