| 燃烧系统参数对商用车发动机燃烧和排放特性的影响研究 |
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| 引用本文： | 雷基林,李臻卓,刘懿,王伟超,宋国富,张海丰. 燃烧系统参数对商用车发动机燃烧和排放特性的影响研究[J]. 内燃机工程, 2024, 45(2): 54-63 |
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| 作者姓名： | 雷基林 李臻卓 刘懿 王伟超 宋国富 张海丰 |
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| 作者单位： | 昆明理工大学 云南省内燃机重点实验室，昆明 650500,昆明理工大学 云南省内燃机重点实验室，昆明 650500,昆明理工大学 云南省内燃机重点实验室，昆明 650500,昆明理工大学 云南省内燃机重点实验室，昆明 650500,昆明云内动力股份有限公司，昆明 650224,昆明云内动力股份有限公司，昆明 650224 |
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| 基金项目： | 云南省科技厅重大科技专项项目（202102AC080004） |
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| 摘 要： | 为改善商用车发动机性能，采用计算流体力学（computational fluid dynamics， CFD）模拟、正交设计等方法，针对某商用车的燃烧室结构参数设计了4种新方案，并选取油束夹角、喷雾锥角、主喷正时等3个喷油参数开展多因素影响研究。结果表明：燃烧室形状曲线向内收缩且最大半径增大的方案1燃烧室可提升缸内湍流特性，改善燃油浓度分布，使燃烧速度加快，油气混合更好，为最优方案。在喷油参数研究方案中，以碳烟（soot）排放为优化指标时，油束夹角对排放特性影响最大，最优匹配方案是油束夹角147°、喷雾锥角15°、主喷正时-1°，其缸内碳烟排放较原机下降13.91%，且NOx排放减少13.98%；以氮氧化物（nitrogen oxides， NOx）排放为优化指标时，主喷正时对排放特性影响最大，最优匹配方案是油束夹角160°、喷雾锥角25°、主喷正时-1°，其缸内NOx排放较原机降低37.79%。
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| 关 键 词： | 商用车 燃烧系统 燃烧室 喷油参数 燃烧特性 排放特性 |
| 收稿时间： | 2023-09-04 |
| 修稿时间： | 2023-12-03 |
Research on the Influence of Combustion System Parameters on the Combustion and Emission Characteristics of Commercial Vehicle Engines |
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| LEI Jilin,LI Zhenzhuo,LIU Yi,WANG Weichao,SONG Guofu and ZHANG Haifeng. Research on the Influence of Combustion System Parameters on the Combustion and Emission Characteristics of Commercial Vehicle Engines[J]. Chinese Internal Combustion Engine Engineering, 2024, 45(2): 54-63 |
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| Authors: | LEI Jilin LI Zhenzhuo LIU Yi WANG Weichao SONG Guofu ZHANG Haifeng |
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| Affiliation: | Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China,Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China,Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China,Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China,Kunming Yunnei Power Corporation Limited， Kunming 650224， China,Kunming Yunnei Power Corporation Limited， Kunming 650224， China |
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| Abstract: | In order to improve the performance of commercial vehicle engines， four new schemes were designed for the structural parameters of the combustion chamber of a commercial vehicle by using computational fluid dynamics（CFD） simulation， orthogonal design， and other methods. Three injection parameters， including oil beam angle， the angle of the spray cone and main spray timing， were selected to carry out a multi-factor impact study. The results show that scheme 1， where the shape curve of the combustion chamber contracts inward and the maximum radius increases， can enhance the turbulent characteristics in the cylinder， improve the distribution of fuel concentration， accelerate combustion speed， and achieve better fuel gas mixing， making it the optimal scheme. In the research of fuel injection parameters， when the soot emission is taken as the optimization index， the oil beam angle has the greatest impact on the emission characteristics. The optimal matching scheme is that the oil beam angle is 147°， the angle of the spray cone is 15°， and main spray timing is -1°. Its in-cylinder soot emissions are 13.91% lower than those of the original engine， and NOx emissions are 13.98% lower than those of the original engine. When the NOx emission is taken as the optimization index， the main spray timing has the greatest impact on the emission characteristics. The optimal matching scheme is that the oil beam angle is 160°， the angle of the spray cone is 25°， and the main spray timing is -1°. The NOx emissions in the cylinder are 37.79% lower than that of the original engine. |
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| Keywords: | commercial vehicle combustion system combustion chamber fuel injection parameter combustion characteristic emission characteristic |
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