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本科学生毕业论文
乙醇油发动机关键技术改进
学院名称: 汽车与交通工程学院
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摘要
目前世界石油资源的短缺和环境污染的加剧,为缓解汽车对石油的依赖,改善全球大气环境污染,适应国际能源开发的需要,世界各国都在寻找新的汽车代用燃料。而乙醇凭借其可再生性和燃烧清洁性,已成为国内外汽车代用燃料的研究重点之一。乙醇燃料是一种新型车用替代燃料,与汽油相比具有可再生性、热效率高和排放低等优点,这对于我国的能源、环保、等问题具有重要意义。
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本文分析了国际原油价格发展历史,并且在目前高油价的形势下分析了乙醇汽油的发展与前景。通过对美国、巴西两国乙醇燃料发展历史与现状的分析对比,得出了两国发展乙醇燃料各自不同的特点,以及他们共同的发展趋势。在分析的基础上对我国乙醇汽油发展提出了建议和意见。概述了国内外乙醇汽油的发展现状,和发展乙醇汽油的目的和意义。找出乙醇汽油现阶段存在的问题。
本文对四种燃料E0、E5、E10和E15的台架试验数据进行了分析,从动力性、经济性和排放性能分别进行了对比试验,研究表明, 本论文对燃用四种低比例乙醇汽油混合燃料后发动机的动力性和燃油经济性做了一定的研究与分析,发现乙醇汽油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,燃油经济性有所降低。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。
本文最后参考国内外相关资料进行了分析,并提出了解决建议。
关键词:乙醇;排放性;经济性;动力性;实验分析;改进研究
ABSTRACT
The world's oil resources shortage and environmental pollution increase, to ease dependence on oil vehicle, improving the global atmospheric pollution, the need to adapt to the international energy development, countries in the world looking for new alternative fuel vehicles. And by virtue of its renewable nature of ethanol bustion cleanliness, alternative fuel vehicles at home and abroad has e a focus of research. Ethanol fuel is a new alternative fuel vehicle, compared with gasoline with renewable, low thermal efficiency and emissions benefits, which for our energy, environmental protection, and other issues of great significance.
This paper analyzes the history of international crude oil prices and high oil prices in the current situation of the development of ethanol gasoline and prospects. Through the United States, Brazil, ethanol fuel between the two countries history and current situation analysis parison of the development of ethanol fuel between the two countries reached their different characteristics, and mon trends. Based on the analysis of ethanol gasoline in China has put forward suggestions ments. An overview of the development of ethanol fuel situation at home and abroad, and developing the purpose and meaning of ethanol gasol