大缸径天然气发动机几何压缩比与米勒度协同优化

曹佳乐; 李铁; 依平; 黄帅; 杨润岱; 黄雅婷

doi:10.3969/j.issn.1001-2222.2021.03.005

车用发动机 ›› 2021, Vol. 0 ›› Issue (3) : 26-31. DOI: 10.3969/j.issn.1001-2222.2021.03.005

栏目

大缸径天然气发动机几何压缩比与米勒度协同优化

曹佳乐¹，李铁¹，依平¹，黄帅¹，杨润岱²，黄雅婷²

作者信息 +

Collaborative Optimization of Geometric Compression Ratio and Miller Degree of Large-Bore Natural Gas Engine

CAO Jiale¹,LI Tie¹,YI Ping¹,HUANG Shuai¹,YANG Rundai²,HUANG Yating²

Author information +

文章历史 +

摘要

利用GT-Power建立了某大缸径天然气发动机的一维热力学循环仿真模型，用原机台架试验数据标定，使仿真模型计算准确后，研究了发动机设计参数几何压缩比以及米勒度对发动机性能的影响。以提高发动机热效率和降低排气温度为目标，利用神经网络建模与遗传算法对发动机设计与控制参数进行协同优化。优化结果表明，在保证发动机扭矩输出的条件下，通过对几何压缩比与米勒度的协同优化可以提高指示热效率，降低排气温度，改善发动机性能。

Abstract

The GTPower software was used to establish onedimensional thermodynamic cycle simulation model of natural gas engine with a large bore. The accuracy of simulation model was verified after the calibration based on the engine bench test data. Then the effect of engine geometric compression ratio and Miller degree on engine performance was studied with the model. The neural network modeling and genetic algorithm were used to conduct the collaborative optimization of engine design and control parameters so as to improve the thermal efficiency and reduce the exhaust gas temperature. The results show that it is feasible to increase thermal efficiency, reduce exhaust gas temperature, and improve engine performance by the collaborative optimization of geometric compression ratio and Miller degree without loss of torque output.

导出引用

曹佳乐，李铁，依平，黄帅，杨润岱，黄雅婷. 大缸径天然气发动机几何压缩比与米勒度协同优化[J]. 车用发动机. 2021, 0(3): 26-31 https://doi.org/10.3969/j.issn.1001-2222.2021.03.005

CAO Jiale,LI Tie,YI Ping,HUANG Shuai,YANG Rundai,HUANG Yating. Collaborative Optimization of Geometric Compression Ratio and Miller Degree of Large-Bore Natural Gas Engine[J]. Vehicle Engine. 2021, 0(3): 26-31 https://doi.org/10.3969/j.issn.1001-2222.2021.03.005