Abstract
A simulation model is useful to evaluate the NOx emission in real-driving due to variable conditions such as, environmental and traffic conditions. In the authors’ previous study, it was possible to predict the NOx emission in real-driving conditions using a vehicle without a NOx reduction catalyst. In this study, a new model to simulate the amount of NOx emission was developed and evaluated under different engine specifications using a vehicle equipped with a NOx reduction catalyst. An introduction of a coefficient of NOx conversion efficiency enabled the quantitative prediction of NOx emission at tail-out by accounting for the temporal variation of catalyst’s temperature.
