本科学生毕业论文车用乙醇汽油发动机性能的实验研究系部名称： 汽车与交通工程学院 专业班级： 车辆工程 学生姓名： 指导教师： 职 称： 讲师 The Graduation Thesis for Bachelors DegreeStudy on Ethanol Gasoline Engine Performance全套设计，加Candidate：Yao ChunyuSpecialty：Vehicle EngineeringClass：B07-2Supervisor：Lecturer. Zhu RongfuHeilongjiang Institute of Technology I摘 要本次论文的题目是车用乙醇汽油发动机性能的实验研究。为了缓解汽车工业的飞速发展所带来的能源紧张和环境污染双重压力，研制开发清洁代用燃料以及合理的资源利用已成为日益突出的现实性课题。所谓车用乙醇汽油，就是把变性燃料乙醇和汽油以一定比例混配形成的一种汽车燃料。本论文在对纯汽油（E0）和 E10 和 E20 做了部分工况外特性和负荷特性实验基础上，对发动机的动力性、燃油经济性、排放特性和燃烧特性也做了一定的研究与分析，发现燃用混合燃料的动力性有所降低，但与原机相差不大:以质量计的燃油消耗率明显增加，但以热值计的能耗率保持良好，燃油经济性有所降低燃烧特性分析从根本上分析了乙醇汽油动力性不足的原因。燃用乙醇汽油混合燃料后，尾气排放中的 CO 和HC 能够明显得到降低，但同时也会引起个别工况下 NOx 排放量的增加。燃料三元催化转化效率与燃料的的含醇量以及发动机的负荷和转速有关。关键词：乙醇汽油；动力性；燃油经济性；排放特性；燃烧特性 IIABSTRACTThe topic of the paper is Ethanol Gasoline Engine Performance Study. In order to alleviate the rapid development of automobile industry brought about by the energy shortage and environmental pollution dual pressures of clean alternative fuel research and development and the rational use of resources has become the reality of an increasingly prominent issue. The so-called vehicle ethanol gasoline, is to denatured fuel ethanol and gasoline mixture to form a certain percentage of motor fuel.This thesis on pure gasoline (E0) and made a part of the E10 and E20 external characteristics and load conditions based on the experimental characteristics of the engine power, fuel economy, emission characteristics and combustion characteristics are also done some research and analysis found that mixed fuel burning power performance decreased, but with little difference between the original machine: the mass of the fuel consumption rate was increased, but the energy consumption rate of heat value of the good, have lower fuel economy burn Analysis of a fundamental lack of ethanol causes gasoline. Fuel ethanol blended gasoline fuel, emissions of CO and HC can be reduced significantly, but operating conditions will also cause the individual to increase NOx emissions. Catalytic fuel conversion efficiency and the amount of fuel containing alcohol as well as the engine load and speed related.Keywords: Ethanol Gasoline; Dynamics; Fuel Economy; Emissions Characteristics；Combustion Characteristics 目 录摘要 IAbstractII第 1 章 绪论 11.1 选题的目的及意义 11.2 乙醇汽油混合燃料的研究现状 21.2.1 国外研究现状 21.2.2 国内研究现状 21.3 研究内容 3第 2 章 乙醇汽油理化特性研究 42.1 乙醇理化性质 42.2 乙醇汽油的热值计算 52.3 本章小结 7第 3 章 乙醇汽油发动机性能研究 83.1 实验装置仪器 83.2 实验方案 113.3 动力性分析 123.3.1 影响因素分析 123.3.2 实验结果分析 133.4 燃油经济性 143.5 排放特性分析 183.5.1 怠速工况下排放特性分析 183.5.2 一氧化碳（CO）排放特性分析 183.5.3 碳氢化合物（HC）排放特性分析 213.5.4 氮氧化物（NO X）排放特性分析 233.6 本章小结 26第 4 章 乙醇汽油的三元催化转化性能研究 274.1 三元催化转化器的构造及反应原理 27 4.1.1 三元催化转化器的构造