| EGR率对柴油机低温燃烧滞燃期影响的试验研究 |
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| 引用本文： | 毕方英,郑金保,缪雪龙,王先勇,洪建海,陈希颖,居钰生.EGR率对柴油机低温燃烧滞燃期影响的试验研究[J].现代车用动力,2011(1):16-21,25. |
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| 作者姓名： | 毕方英 郑金保 缪雪龙 王先勇 洪建海 陈希颖 居钰生 |
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| 作者单位： | 1. 长春汽车工业高等专科学校,吉林,长春,130000
2. 中国一汽无锡油泵油嘴研究所,江苏,无锡,214063 |
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| 摘 要： | 根据缸内压力求得缸内平均温度和放热规律,分析了进排气系统的O2体积分数、燃烧始点、喷油始点和终点的温度、压力对低温燃烧早喷射和晚喷射两种情况下滞燃期的影响,早喷射和晚喷射一样随着废气再循环(EGR)率的增大而延长了滞燃期。早喷射的滞燃期要短于晚喷射的滞燃期,因此为了能够让空气与燃油有更多的时间混合,早喷射比晚喷射需要更大的EGR率。但随着大量EGR的加入,过量空气系数不能反映混合气中O2体积分数,滞燃期与混合气温度、压力和O2体积分数有关,在影响低温燃烧滞燃期的因素当中,温度对滞燃期的影响最为明显。
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| 关 键 词： | 滞燃期 低温燃烧 柴油机 早喷射 晚喷射 |
Experimental Study on the Influence of EGR Rate on Combustion Delay in Low Temperature Combustion Diesel Engine |
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| BI Fang-ying,ZHENG Jin-bao,MIAO Xue-long,WANG Xian-yong,HONG Jian-hai,CHEN Xi-ying,JU Yu-sheng.Experimental Study on the Influence of EGR Rate on Combustion Delay in Low Temperature Combustion Diesel Engine[J].Modern Vehicle Power,2011(1):16-21,25. |
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| Authors: | BI Fang-ying ZHENG Jin-bao MIAO Xue-long WANG Xian-yong HONG Jian-hai CHEN Xi-ying JU Yu-sheng |
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| Affiliation: | BI Fang-ying1,ZHENG Jin-bao2,MIAO Xue-long2,WANG Xian-yong2,HONG Jian-hai2,CHEN Xi-ying2,JU Yu-sheng2 (1.Changchun Automobile Industry Institute,Changchun 130000,China,2.FAW Wuxi Fuel Injection Equipment Research Institute,Wuxi 214063,China) |
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| Abstract: | Cylinder temperature and heat release were calculated base on the obtained cylinder pressure,Effect of O2 concentration,temperature and pressure at certain point on combustion delay were analyzed at late injection and early injection with different EGR rate.Weather late injection or early injection,Combustion delay was put off with increasing EGR rate.Early injection demand lager EGR and the combustion delay were shorter than late injection in low temperature combustion diesel engine.Excess air coefficient ... |
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| Keywords: | combustion delay low temperature combustion diesel engine early injection late injection |
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