| 摘要:各缸EGR率的均匀一致性控制，对于发动机NOx排放达标至关重要。针对某四缸柴油机设计了4种不同EGR结构方案，并采用AVL FIRE软件分别对其进行EGR混合均匀性模拟分析。分析表明:进气接管朝发动机中间，EGR管从进气接管侧方伸入的结构，其EGR均匀一致性最好。为后续的设计奠定了基础。 |
| 关键词: 柴油机；废气再循环；均匀一致性；NOx 排放 |
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| Research on EGR Homogeneous Charge of a Four-Cylinder Engine Based on CFD |
| Liang Baoquan |
| Yuchai Machinery Co.,Ltd., Guangxi Yulin 537005 |
| Abstract:The EGR rate uniformity of each cylinder is crucial to the compliant of NOx emissions standard. Four different EGR structure layouts were designed for a type of four-cylinder diesel engine, and the AVL FIRE software was employed to carry out simulation analysis on the EGR homogeneous charge. The results show that the middle-side structure that arranges the inlet connecting pipe towards the middle of the engine, and the EGR pipe connected to the side of inlet connecting pipe has the best EGR uniformity. The research results lay the foundation for further design. |
| Key words: diesel engine EGR uniformity NOx emissions |
