黄震，金兆辉，姜北平，任瑞雪，安东,洪伟.稀燃条件下甲醇汽油发动机燃烧和排放特性的试验研究[J].内燃机工程,2018,39(2):48-52.
稀燃条件下甲醇汽油发动机燃烧和排放特性的试验研究
Experimental Study on Combustion and Emission Characteristics of a Lean Burn Engine Fueled with Methanol/Gasoline
DOI：
关键词:GDI发动机  甲醇汽油  稀薄燃烧  燃烧特性  排放特性
Key Words:GDI engine  methanol/gasoline  lean burn  combustion characteristics  emission characteristics
基金项目:国家自然科学基金项目（51276080）；吉林省自然科学基金项目（20170101137JC）
作者单位
黄震，金兆辉，姜北平，任瑞雪，安东,洪伟 1.吉林大学 汽车仿真与控制国家重点实验室，长春 130022； 2.长春一汽四环发动机制造有限公司，长春 130000 
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摘要:在一台汽油缸内直喷（GDI）增压发动机上，研究了稀燃条件下燃用不同甲醇汽油混合燃料的燃烧特性和排放特性。试验结果表明：稀燃条件下，随混合气浓度逐渐变稀，当量燃油消耗率呈现出先降低后升高的趋势，并且随着甲醇比例的增加，当量燃油消耗率增加，但均低于原机。在混合气逐渐变稀的过程中，燃烧时缸压峰值和燃烧温度总的变化趋势是逐渐降低，而燃烧持续期和循环变动率逐渐升高。稀燃条件下,CO排放量逐渐降低，碳氢化合物排放呈先降低后增加的趋势。NOx排放量总的变化趋势是先增大后逐渐降低，随着甲醇体积分数的增加，NOx的排放量逐渐降低，且3种甲醇、汽油混合燃料的NOx和CO排放量都低于汽油燃料。
Abstract:The combustion and emission characteristics of a GDI turbocharged engine fueled with different methanol/gasoline blends respectively were investigated under lean burn conditions. Results show that under lean burn conditions, the equivalent fuel consumption tends to decrease first and then increase with the mixture concentration getting thinner. It will increase with the rise of methanol/gasoline ratio, but lower than the original. In the process of the mixture getting thinner, the peak cylinder pressure and combustion temperature decrease, while the combustion duration and cycle to cycle variability gradually increase, Under lean burn conditions, the CO emissions tend to decrease and the HC emissions decrease first and the increase, while the NOx emissions increase first and then decrease, and will decrease with the increase of the volume fraction of methanol. Moreover, when the engine operates with methanol/gasoline blends, the emission levels of NOx and CO are lower than with gasoline operation.
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