The Development of Advanced Urea-SCR Systems for Tier 2 Bin 5 and Beyond Diesel Vehicles 2010-01-1183
An advanced diesel aftertreatment system utilizing Selective Catalytic Reduction (SCR) with urea for lean nitrogen oxides (NOx) control was tested on a 2.7L V6 Land Rover vehicle to demonstrate the capability of achieving Tier 2 Bin 5 and lower emission standards for light-duty trucks. SCR washcoat was applied to a diesel particulate filter (DPF) to perform NOx and particulate reduction simultaneously. Advanced SCR systems employed both traditional SCR catalysts and SCR-coated filters (SCRF) to improve the NOx reduction efficiency. The engine-out NOx level was adjusted by modifying the EGR (Exhaust Gas Recirculation) calibration. Cold start NOx performance was improved by SCR warm-up strategy and urea over injection. This study showed the advanced SCR system could tolerate higher NH₃ storage in the SCR catalyst, resulting in overall higher NOx conversion on the FTP-75 test cycle. With a modified strategy, the aftertreatment system (oven aged to represent 120k mi) achieved 0.046 g/mi for NOx tailpipe emission and 0.023 g/mi for NMHC tailpipe emission.
Citation: Guo, G., Warner, J., Cavataio, G., Dobson, D. et al., "The Development of Advanced Urea-SCR Systems for Tier 2 Bin 5 and Beyond Diesel Vehicles," SAE Technical Paper 2010-01-1183, 2010, https://doi.org/10.4271/2010-01-1183. Download Citation
Author(s):
Gang Guo, James Warner, Giovanni Cavataio, Douglas Dobson, Edward Badillo, Christine Lambert
Affiliated:
Ford Motor Co.
Pages: 13
Event:
SAE 2010 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Diesel Exhaust Emission Control, 2010-SP-2287
Related Topics:
Selective catalytic reduction
Exhaust gas recirculation (EGR)
Diesel particulate filters
Nitrogen oxides
Environmental regulations and standards
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »