Abstract
Diesel engines display high thermal efficiency, and are therefore effective in reducing CO2 emissions as a means of combating global warming. However, because diesel engines use lean combustion, it is not possible to convert NOx using a three-way-catalyst (TWC). The research discussed in this paper therefore focused on urea-selective catalytic reduction (urea-SCR) systems. The realization of a dramatic increase in the NOx conversion performance of these systems has led to the possibility of satisfying the demands of LEV-III SULEV and Euro 6 regulations.
KEYWORDS – After treatment, Emission control, Engine control, Adaptive control, Feedback control