| 空燃比对准均质充量压缩点燃天然气发动机低负荷排放性能的影响 |
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| 引用本文： | 苏岭,周龙保,汪映,蒋德明,李维,钟辉. 空燃比对准均质充量压缩点燃天然气发动机低负荷排放性能的影响[J]. 兵工学报, 2006, 27(5): 895-898 |
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| 作者姓名： | 苏岭 周龙保 汪映 蒋德明 李维 钟辉 |
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| 作者单位： | 西安交通大学,能源与动力工程学院,陕西,西安,710049;长安汽车集团,汽车工程研究院,重庆,400023;西安交通大学,能源与动力工程学院,陕西,西安,710049 |
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| 摘 要： | 通过采用进气节流改变空气／天然气过量空气系统фa，实验研究了фa对准均质充量压缩点燃( QHCCI)天然气发动机的低负荷排放性能的影响。研究结果表明：在低负荷工况下，фa太小，将会导致NOx，排放增加，热效率下降；фa过大，将会导致HC、CO排放的增加。通过对фa进行优化控制，大大降低了低负荷工况下HC和CO排放。
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| 关 键 词： | 动力机械工程 QHCCI发动机 过量空气系数 低负荷 排放 |
| 文章编号： | 1000-1093（2006）05-0895-04 |
| 收稿时间： | 2004-10-08 |
| 修稿时间： | 2004-10-08 |
Effect of Air/CNG Equivalence Ratio on Emissions and Performances of CNG Engine Operating on QHCCI Mode at Low Loads |
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| SU Ling,ZHOU Long-bao,WANG Ying,JIANG De-ming,LI Wei,ZHONG Hui. Effect of Air/CNG Equivalence Ratio on Emissions and Performances of CNG Engine Operating on QHCCI Mode at Low Loads[J]. Acta Armamentarii, 2006, 27(5): 895-898 |
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| Authors: | SU Ling ZHOU Long-bao WANG Ying JIANG De-ming LI Wei ZHONG Hui |
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| Affiliation: | 1.School of Energy and Power Engineering, Xi an Jiaotong University, Xi'an 710049, Shaanxi, China;2. Automobile Engineering Academy of Changan Automobile Group, Chongqing 400023, China |
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| Abstract: | using intake throttling to change excess air/CNG ratio Фa, experimental study on the effect of excess air/CNG ratio Фa on the thermal efnciency and emissions of the CNG engine operating on quasi-homogeneous charge compression ignition (QHCCI) mode at low loads was carried out. The re?sults show that when CNG engine operates on QHCCl mode at low loads, too small Фa causes the in?crease in NOx emission and the decrease in thermal efficiency, while too large Фa leads to the increase in CO and HC emissions. HC and CO emissions are reduced remarkably by optimizing Фa. |
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| Keywords: | power mechanical engineering quasi homogeneous charge compression Ignition engine excess air/CNG ratio low load emission |
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