联合GT及Matlab的柴油机虚拟标定

Virtual Calibration on Diesel Engine Modeling Based on GT and Matlab

基于某款欧Ⅵ重型柴油机和GT-Power软件搭建相应的虚拟发动机模型,并进行标定,进行性能预测并验证预测精度。根据自主开发软件和欧Ⅵ法规要求,计算排放区域并选择合理的工况点,进行试验设计(DoE)。利用虚拟发动机预测DoE点的性能及排放。基于Matlab软件的基于模型标定(MBC)工具箱,结合拟定的各排放点及排放循环的排放物控制范围,进行满足原机排放要求及经济性最优的虚拟标定。最终在完全脱离发动机试验的情况下获取优化的电控参数脉谱。

The virtual model of a Europe Ⅵ diesel engine was established and calibrated with the software GT-Power. First, the engine performance was virtually predicted and the prediction accuracy was verified. The areas of emissions were calculated, engine operating points were selected, and design of experiment （DOE） was designed based on a self-created software and the emissions regulation. Next, the virtual engine was used to predict the performance and NOx emission at DoE points. Finally, the emissions and BSFC （brake specific fuel consumption） of the engine were optimized virtually based on the model-based calibration toolbox （MBC） of Matlab with all given ranges of emissions control in the different areas. The maps of electronic control parameters were obtained from the optimized emissions and BSFC without test.