| 刘克铭,孙雨梦,孙志扬,等.均质压燃可变压缩比汽油机动力性与燃油经济性分析[J].内燃机工程,2025,46(6):65-73. |
| 均质压燃可变压缩比汽油机动力性与燃油经济性分析 |
| Analysis of Power Performance and Fuel Economy of a Gasoline Engine with Variable Compression Ratio of Homogeneous Charge Compression Ignition |
| DOI：10.13949/j.cnki.nrjgc.2025.06.007 |
| 关键词:均质压燃 可变压缩比 有效转矩 燃油经济性 |
| Key Words:homogeneous charge compression ignition variable compressionratio effective torque fuel economy |
| 基金项目: |
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| 摘要:针对均质压燃（homogenous charge compression ignition， HCCI）负荷范围较窄问题，对发动机气缸盖进行改造使其具备可变压缩比功能。利用GT-POWER仿真软件搭建发动机一维模型，探究压缩比对HCCI发动机动力性与经济性的影响，通过非支配排序遗传算法（non-dominated sorting genetic algorithm-Ⅱ， NSGA-Ⅱ）与基于搜索模式目标优化算法对比分析，可变压缩比技术可有效拓宽HCCI发动机的负荷范围并改善发动机经济性。以发动机转速3 000 r/min为例，应用可变压缩比技术后，相较于原型机，合理压缩比下失火转矩可拓宽3.12%，爆震转矩可提升7.50%，同时经济性也可得到改善。优化后，最大有效转矩提高了4.80%，最佳有效燃油消耗率改善了8.00%。 |
| Abstract:Due to the narrow load range of homogenous charge compression ignition（HCCI）， the engine cylinderhead was modified to incorporate a variable compression ratio function， thereby expanding the load range of HCCI. A one-dimensional engine model was established using GT-POWER simulation software to investigate the impact of compression ratio on the power performance and the economy of a HCCI engine. Through a comparative analysis between non-dominated sorting genetic algorithm-Ⅱ（NSGA-Ⅱ） and search-mode target optimization algorithm， variable compression ratio technology could effectively broaden the load range of the HCCI engine and improve its fuel economy. Taking the engine at 3 000 r/min as an example， compared with the prototype， the misfire torque was expanded by 3.12%， the knock torque was increased by 7.5%， and the fuel economy was correspondingly improved. The maximum effective torque increased by 4.80%， and the optimal effective fuel consumption rate improved by 8.00% after optimization. |
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