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针对环境和能源形势的日趋恶化，汽车作为污染环境和消耗能源的大户，历来备受关注，开发环境污染小且具有一定发展前景的“绿色汽车发动机”已成为竞相开发的热点，且形色各异。醇类发动机醇类发动机主要是指甲醇、乙醇。甲醇来源丰富，可从煤炭、天然气中制取。现有的汽油发动机只要经过稍加改造就可以燃烧醇类燃料。目前，日本、美国、巴西等都已开发出醇类发动机。醇类燃料也存在一些缺点：如冷起动、气阻和对塑料件和橡胶的溶胀和腐蚀
In response to the deteriorating environment and energy situation, the automobile has always been the focus of environmental pollution and energy consumption. It has been a hotspot of competing development that developing a “green car engine” with small environmental pollution and certain development prospects different. Alcohol engine alcohol engine mainly refers to methanol, ethanol. Methanol sources rich, available from coal, natural gas system. The existing gasoline engine can burn alcohol fuel with slight modification. At present, Japan, the United States, Brazil, have developed alcohol engines. There are also some disadvantages of alcohol fuels: such as cold start, gas resistance and swelling and corrosion of plastic parts and rubber