| 缸内活化热氛围对柴油机燃烧与排放特性的影响 |
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| 引用本文： | 吕兴才,吉丽斌,马骏骏,黄震. 缸内活化热氛围对柴油机燃烧与排放特性的影响[J]. 内燃机工程, 2009, 30(3) |
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| 作者姓名： | 吕兴才 吉丽斌 马骏骏 黄震 |
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| 作者单位： | 上海交通大学,动力机械及工程教育部重点实验室,上海,200240;上海交通大学,动力机械及工程教育部重点实验室,上海,200240;上海交通大学,动力机械及工程教育部重点实验室,上海,200240;上海交通大学,动力机械及工程教育部重点实验室,上海,200240 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金,国家重点基础研究发展规划(973计划) |
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| 摘 要： | 采用气口喷射正庚烷形成稀薄均匀混合气,利用其低温和高温化学反应释放的热量和生成的活性基团在柴油喷入气缸前形成活化热氛围,研究了活化热氛围强度对直喷柴油燃烧和排放的影响.研究发现:随着正庚烷比例的增加,活化热氛围强度增大,柴油扩散燃烧着火时刻略有提前,最大放热率明显降低,高负荷下的NOx和烟度排放显著降低;活化热氛围强度超过某一临界点后,NOx抑制效果开始减弱并单调升高,而烟度排放开始升高到极大值后再次降低.综合各个负荷下的排放,热氛围强度不适宜过强,在试验条件下20 %～30 %最佳.
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| 关 键 词： | 内燃机 柴油机 正庚烷 活化热氛围 燃烧 排放 |
Effects of In-Cylinder Active Thermo-Atmosphere Conditions on Diesel Engine Combustion and Emissions |
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| L Xing-cai,JI Li-bin,MA Jun-jun,HUANG Zhen. Effects of In-Cylinder Active Thermo-Atmosphere Conditions on Diesel Engine Combustion and Emissions[J]. Chinese Internal Combustion Engine Engineering, 2009, 30(3) |
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| Authors: | L Xing-cai JI Li-bin MA Jun-jun HUANG Zhen |
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| Affiliation: | Key Laboratory for Power Machinery and Engineering of M.O.E;Shanghai Jiaotong University;Shanghai 200240;China |
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| Abstract: | Port-fuel injection of n-heptane was used to prepare the lean fuel/air mixture,and active radicals and heat release were produced by means of the low temperature reaction(LTR) and high temperature reaction(HTR).The premixed ratio of n-heptane was used to denote active thermo-atmosphere conditions(ATAC) intensity.The results show that with the increase of ATAC intensity,the peak value of diffusion combustion decreases,NOx emission and smoke opacity reduce substantially and attain to the lowest value at a cer... |
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| Keywords: | IC engine diesel engine n-heptane active thermo-atmosphere combustion emission |
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