Effects of an In-Cylinder Active Thermo-Atmosphere Environment on Diesel Engine Combustion Characteristics and Emissions
Effects of an In-Cylinder Active Thermo-Atmosphere Environment on Diesel Engine Combustion Characteristics and Emissions
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DOI：
10.1021/ef8001907
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发表时间：
2008-06
期刊：
影响因子：
5.3
通讯作者：
Xingcai Lu;Libin Ji;Junjun Ma;Chen Huang;Zhen Huang
中科院分区：
文献类型：
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作者：
Xingcai Lu;Libin Ji;Junjun Ma;Chen Huang;Zhen Huang
这项工作研究了缸内活跃热气氛环境（ATAE）对单缸柴油机燃烧和排放的影响。采用正庚烷端口燃料喷射来制备贫燃料/空气混合物，在低温反应（LTR）和高温反应（HTR）过程中发现了活性自由基和热量释放。正庚烷的预混比例用于表示ATAE强度。评价了直喷柴油的ATAE强度和供油角对燃烧和排放的影响。实验结果表明，随着正庚烷预混比例的增加，LTR和HTR中的放热率(HRR)最大值均增加，这意味着ATAE强度增加。随着ATAE强度的增加，扩散燃烧的峰值降低，NOx排放和烟气不透明度首先大幅降低，并在某一点达到最低水平。哦...
This work investigated the effects of an in-cylinder active thermo-atmosphere environment (ATAE) on the diesel engine combustion and emissions in a single-cylinder diesel engine. Port-fuel injection of n-heptane was used to prepare the lean fuel/air mixture, and active radicals and heat release were found during the low-temperature reaction (LTR) and high-temperature reaction (HTR). The premixed ratio of n-heptane was used to denote the ATAE intensity. The effects of ATAE intensity and fuel delivery angle of directly injected diesel fuel on the combustion and emissions were evaluated. The experimental results reveal that, as the premixed ratio of n-heptane increases, both the maximum values of the heat release rate (HRR) in the LTR and HTR increase, which means that the ATAE intensity increases. With the increase of the ATAE intensity, the peak value of the diffusion combustion decreases and NOx emissions and smoke opacity reduce substantially at first and attain to the lowest levels at a certain point. O...