摘要
以发动机空燃比、EGR率、进气早开角和排气早开角为优化变量,研究甲醇发动机在全负荷不同转速下对扭矩、有效燃油消耗率和NOx排放的影响规律。利用GT-power软件构建了甲醇发动机一维数值模型,通过D-Optimal拉丁超立方试验设计方法构建发动机响应面模型,分析了各优化变量对发动机性能的影响程度;最后以发动机最大扭矩、有效燃油消耗率和NOx排放为优化目标,利用NSGA-Ⅱ遗传算法迭代得到Pareto前沿最优解集。优化后的结果表明:3个转速下的甲醇发动机的扭矩平均提高了2.09%,NOx平均下降了18.77%,与此同时,甲醇发动机的有效燃油消耗率也得到了改善。
In this paper,air-fuel ratio,EGR rate,intake early opening angle and exhaust early opening angle of the engine are considered as optimization variables,and their influence on torque,effective fuel consumption rate and NO x emission at different full load speeds is studied.Firstly,a one-dimensional numerical model of the methanol engine is constructed using GT-power software.Secondly,the response surface model of the engine is constructed using D-Optimal Latin Hypercube experimental design method.Then,the influence of each optimization variable on the engine performance is analyzed.Finally,taking the maximum engine torque,effective fuel consumption and NO x emission as optimization objectives,NSGA-Ⅱgenetic algorithm is used to obtain the Pareto frontier optimal solution set.The optimized results show that the average torque of the methanol engine increases by 2.09%and the average NO x decreases by 18.77%at the three rotational speeds.At the same time,the effective fuel consumption of the methanol engine is also improved.
作者
钱创造
朱建军
胡正兴
孟雨航
赵亚峰
QIAN Chuangzao;ZHU Jianjun;HU Zhengxing;MENG Yuhang;ZHAO Yafeng(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《重庆理工大学学报（自然科学）》
北大核心
2023年第8期56-63,共8页
Journal of Chongqing University of Technology：Natural Science
