DPF SCR Combinations Integrated Systems to Meet Future LDV Emission Limits

This paper describes solutions to handle the complexity of systems including Selective Catalytic Reduction (SCR) and Diesel Particulate Filters (DPF) and possible combinations with additional components. Results of integrated systems with different configurations are also discussed.

A lot of development work was undertaken to develop validated and reliable mathematical models of single components as well as for the complete system. Commencing with DPF soot loading and regeneration models, additional tools are presented to define the best size and loading of oxidation catalysts for enhancing the system performance by generating NO2, as well as models to optimize the size and the dosing logic for the urea SCR.