富氧燃烧发动机缸内过程试验研究.pdf

25 3 Vol25 o3 2008 3 Journal of Highway andTransportation Research and Development Mar2008 :(2008) 李胜琴, 关 强, 张文会 (, 150040) : 提出汽油发动机富氧燃烧技术, 在单缸化油器式汽油机上进行富氧燃烧试验利用燃烧分析仪对相 负荷状态 下不 氧气浓度富氧燃烧时发动机的燃烧特性进行分析当进入气缸助燃的空气中氧气浓度增加到24% 时, 气缸的最 大压力升高15%, 最大压力发生时刻提前, 燃油放热增加, 开始放热时刻提前, 燃烧过程的循环变动量降低, 燃烧稳 定性提高 时利用尾气分析仪对怠速状态下不 氧气浓度富氧燃烧发动机的尾气进行监测, 检查发动机排放的变 化试验结果表明, 富氧燃烧发动机尾气中HC和 CO 浓度大大降低, O 浓度升高 X : 汽车工程; 汽油发动机; 富氧燃烧; 燃烧特性; 排放特性 : U4641 : A Test Study on Combustion Process of Oxygenenriched Gasoline Engine LI Shengqin, GUA Qiang, ZHA G Wenhui ( ortheast Forest University, Harbin Heilongjiang 150040, China) Abstract: The effect of oxygenenriched combustion on engine performance was investigatedThe combustion performance of the engine was obtained for an equivalence load with different oxygen concentrations of combustion airFor oxygenenriched combustion air with 24% oxygen, the cylinder pressure increased about 15% , the maximum pressure time was advanced, heat released rate increased, and the time of the heat released was advanced tooThe emission of oxygenenriched combustion engine of different oxygen concentrations were also measured with emission analyzer at idle conditionThe result indicates that, as the oxygen concentration of the combustion air increases, the heat release rate of the same size engine increase; the engine size (displacement) can decrease to achieve the same brake power; oxygen enriched combustion air will affect the combustion process and the overall engine thermodynamics Key words: automobile engineering; gasoline engine; oxygenenriched combustion; combustion performance; emission performance