Modeling and Weight Analysis of Urea-SCR System

Emission regulations for diesel engines are becoming increasingly stricter worldwide, which make the modification to the SCR aftertreatment systems for marching various diesel engines of different emission levels become an urgent problem. This work presented a complete urea-SCR modeling approach. An accurate urea-SCR model consisting of 1d/3d adblue injection model and 1d catalytic converter model was established. After the estimation of kinetic parameters, the model showed good agreement with experimental data for different exhaust temperatures. Based on this advanced urea-SCR platform, this work explored influencing factors on SCR system, analyzed the individuals' weight, and finally found out the critical elements. Obviously, the results of this work can be used to reduce the development cycle and to promote the efficiency.