| Combustion Characteristics and Emission of a Two-Stroke Compression Ignition Engine with Two-Stage Injection |
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| 作者姓名： | 宋军 吕兴才 李孝禄 黄震 |
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| 作者单位： | School of Mechanical Eng. Shanghai Jiaotong Univ.，School of Mechanical Eng.，Shanghai Jiaotong Univ.，School of Mechanical Eng.，Shanghai Jiaotong Univ.，School of Mechanical Eng.，Shanghai Jiaotong Univ.，Shanghai 200030 China，Shanghai 200030 China，Shanghai 200030 China，Shanghai 200030 China |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | In order to study the effect of two-stage injection on two-stroke diesel engines, a well characterized research engine equipped with electronically controlled common rail system and scavenging system was constructed. Through analysis of combustion and emissions, two-stage injection shows its advantages. Compared with the standard injection, it produces less emissions, while compared with single early injection, it expands engine operation range. Further experiments were carried out to study the influence of several injection control parameters on two-stage injection. The fuel in the first injection is used for forming homogeneous mixture. The fuel in the second injection keeps combustion, and it is the main source of smoke emissions. NO_x is formed in both combustion process caused by these two injections, and there is an optimum fuel allocation ration to produce minimum NO_x. The cylinder pressure decreases, and the combustion is depressed with the increasing of scavenging pressure. By optimizing the injection control parameters of two-stage injection, NO_x and smoke can be reduced beyond 30% simultaneously.
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| 关 键 词： | 燃烧 发射 柴油机 二级注入 二笔画 |
| 文章编号： | 1007-1172（2007）01-0053-08 |
| 修稿时间： | 2005-09-27 |
Combustion Characteristics and Emission of a Two-Stroke Compression Ignition Engine with Two-Stage Injection |
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| SONG Jun,L Xing-cai,LI Xiao-lu,HUANG Zhen.Combustion Characteristics and Emission of a Two-Stroke Compression Ignition Engine with Two-Stage Injection[J].Journal of Shanghai Jiaotong university,2007,12(1):53-60. |
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| Authors: | SONG Jun L Xing-cai LI Xiao-lu HUANG Zhen |
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| Institution: | School of Mechanical Eng., Shanghai Jiaotong Univ., Shanghai 200030, China |
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| Abstract: | In order to study the effect of two-stage injection on two-stroke diesel engines, a well characterized research engine equipped with electronically controlled common rail system and scavenging system was constructed. Through analysis of combustion and emissions, two-stage injection shows its advantages. Compared with the standard injection, it produces less emissions, while compared with single early injection, it expands engine operation range. Further experiments were carried out to study the influence of several injection control parameters on two-stage injection. The fuel in the first injection is used for forming homogeneous mixture. The fuel in the second injection keeps combustion, and it is the main source of smoke emissions. NO_x is formed in both combustion process caused by these two injections, and there is an optimum fuel allocation ration to produce minimum NO_x. The cylinder pressure decreases, and the combustion is depressed with the increasing of scavenging pressure. By optimizing the injection control parameters of two-stage injection, NO_x and smoke can be reduced beyond 30% simultaneously. |
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| Keywords: | two-stage injection two-stroke diesel engine combustion emission |
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