| 柴油机起动过程引入EGR对滞燃期影响的研究 |
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| 引用本文： | 袁源,崔毅,彭海勇,邓康耀.柴油机起动过程引入EGR对滞燃期影响的研究[J].柴油机,2012,34(4):6-9. |
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| 作者姓名： | 袁源 崔毅 彭海勇 邓康耀 |
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| 作者单位： | 上海交通大学内燃机研究所,上海,200240 |
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| 摘 要： | 试验研究表明,在柴油机首着火循环前引入EGR可以改善柴油机首着火循环的冷起动性能。在试验研究的基础上,进行了化学动力学计算,进一步研究了EGR对起动燃烧的影响。计算发现着火循环前排气成分中的完全燃烧产物少,而未燃燃油和中间氧化产物的含量大,因此改善了燃烧。通过对不同EGR率和不同燃空当量比下,混合气在定容状态下的滞燃期进行分析,得到了混合气着火性能随着EGR率的变化规律。
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| 关 键 词： | 柴油机 冷起动 EGR 滞燃期 |
| 收稿时间： | 2012/2/1 0:00:00 |
Influence of Introducing EGR on Ignition Delay of Diesel Engine During Cold Starting Period |
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| Yuan Yuan,Cui Yi,Peng Haiyong and Deng Kangyao.Influence of Introducing EGR on Ignition Delay of Diesel Engine During Cold Starting Period[J].Diesel Engine,2012,34(4):6-9. |
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| Authors: | Yuan Yuan Cui Yi Peng Haiyong and Deng Kangyao |
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| Affiliation: | ( Institute of Internal Combustion Engine, Shanghai Jiao Tong University, Shanghai 200240) |
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| Abstract: | It has been investigated experimentally that introducing some amount of exhaust gas to the diesel engine before the first ignition cycle can help to improve the combustion performance. Based on ex perimental research, chemical kinetics simulation was taken to investigate the effect of EGR on the com bustion performance of cold starting periods. The simulation results show that before the ignition cycle, the complete combustion products in exhaust gas is little, the content of residual fuel and intermediate ox idation products is big, therefore improving the combustion. For constant volume combustion, ignition de lay of mixed gas under different EGR ratios and different fuel/air ratios was calculated and analyzed, and the changing rule of ignition characteristics of mixed gas relating to EGR rate was obtained. |
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| Keywords: | diesel engine cold start EGR ignition delay |
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