张涛1，2，王峰1，2，曹原1，2，陈玉杰1，2，王树森1，2，邬忠永1，2，丁保安1，2
1.内燃机可靠性国家重点实验室，山东潍坊261061；2.潍柴动力股份有限公司，山东潍坊261061
摘要：为降低国五车辆便携式排放检测系统（portable emission measurement system,PEMS）检测成本，结合国五阶段重型商用车尾气排放控制策略，在Amesim软件中搭建仿真计算模型；以测试路谱中环境温度、海拔、车速等数据与整车配置作为计算模型的输入，结合发动机台架万有数据、发动机后处理相关map等数据计算尾气中NOx排放，与PEMS设备实测数据进行对比，分析仿真模型的计算精度以及误差原因。结果表明：模型可以实现对国五阶段重型商用车尾气中NOx排放的仿真计算；车辆低速运行时，仿真结果受驾驶员驾驶习惯影响，模型计算NOx转化效率误差较大；车辆稳定运行时，该模型可实现NOx转化效率的趋势性预测。
关键词：重型商用车；控制策略；PEMS；NOx排放;Amesim
Abstract：In order to reduce the cost of the China V vehicle PEMS test, combining with the China V heavy commercial vehicle exhaust emission control strategy, a simulation model is built in the Amesim software.Taking the ambient temperature, altitude, vehicle speed and other data in the test road spectrum and the vehicle configuration as the input of the calculation model, combined with the engine bench universal data, engine postprocessing map and other data, the NOx emission in the exhaust gas is calculated. The accuracy and error of the model are analyzed according to the comparison between the measured data and the calculated data.The results show that it is feasible to simulate and calculate the NOx emissions of the China V heavy commercial vehicle. When the vehicle runs at low speed, the calculation error of the model is large because of the influence of drivers′ driving habits. The model can predict the trend of NOx emission when the vehicle runs stably.
Keywords:heavy commercial vehicle; control strategy; PEMS; NOx emissions;Amesim
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