孙良良，冯洪庆
中国石油大学（华东）新能源学院，山东 青岛 266580
摘要：以某农用高压共轨柴油机为研究对象，将应用试验设计（design of experiment, DoE）与数值仿真相结合，对柴油机的结构参数进行优化仿真。选取柴油机进气系统参数与配气相位作为设计变量，通过试验获得设计目标的响应特性，拟合得到响应面近似模型。应用遗传预测算法进行多参数多目标优化求解，得到柴油机常用工况下的最佳设计参数。研究结果表明：设计参数优化后，柴油机的有效扭矩提高了2.6%，有效比油耗降低了25%，排气温度降低了16.7%。
关键词：农用柴油机；进气系统；配气相位；数值仿真；DoE
Abstract:A diesel engine used for agriculture is selected to optimize the structural parameters by DOE combining with numerical simulation.Several structural parameters is selected as design variables and the response characteristic of the design target is obtained through the experiment. The response surface approximation model is obtained by fitting. Multiparameter and multiobjective optimization is carried out by genetic algorithm and the optimal design parameters of engine common working conditions is obtained. The results show that the effective torque is increased by 2.6%, the effective specific fuel consumption is reduced by 2.5%, and the exhaust temperature is reduced by 16.7%.
Keywords:agricultural engine; intake system; valve timing; numerical simulation; DoE
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