Abstract
In the actual driving on the road, it is important to maintain the emissions level of the time of type approval. In this report, we installed the PEMS in diesel vehicles, and measured emissions under various driving conditions. Next, we paid attention to the fact that the NOx emission can be regarded as a function of the engine speed and the engine torque. Furthermore, from measurement data, we devised and verified a method for grasping whether or not the NOx emission level at the type approval is maintained based on the Moving Averaging Window (MAW) method being studied in Europe.
