基于模型标定方法在高压共轨柴油机排放优化中的应用

Application of Model Based Calibration to the Emission Optimizationof High-Pressure Common Rail Diesel Engines

采用模型标定方法对某款高压共轨柴油发动机特征工况的排放进行优化。重点介绍了DOE试验样本的确定及发动机排放模型的建立,并基于设定的优化目标和优化方法得到了各工况下满足排放最优的ECU参数。与实际台架试验结果的比较表明:基于模型标定的方法能够更好地模拟真实发动机的排放情况。与常规标定方法相比,基于模型标定方法能够大幅缩减试验样本量,且样本取点分布更为合理,优化效果相对更好。

Model based calibration method was used on a high pressure common rail diesel engine for emission optimization under characteristic condition.The determination of DOE test samples and the establishment of engine emissions model were introduced in detail.Based on the optimized goals and method,the ECU parameters for optimal emissions were obtained.Compared with bench test results,it shows that model based calibration could better simulate the emissions of a real engine.The comparison between model based calibration and normal calibration indicates that the model based calibration could largely decrease the test samples,the distribution sample points is more rational,thus realizes better optimization result.