On-Road Evaluation of an Integrated SCR and Continuously Regenerating Trap Exhaust System 2012-01-1088
Four-way, integrated, diesel emission control systems that combine selective catalytic reduction for NOx control with a continuously regenerating trap to remove diesel particulate matter were evaluated under real-world, on-road conditions. Tests were conducted using a semi-tractor with an emissions year 2000, 6-cylinder, 12 L, Volvo engine rated at 287 kW at 1800 rpm and 1964 N-m. The emission control system was certified for retrofit application on-highway trucks, model years 1994 through 2002, with 4-stroke, 186-373 kW (250-500 hp) heavy-duty diesel engines without exhaust gas recirculation. The evaluations were unique because the mobile laboratory platform enabled evaluation under real-world exhaust plume dilution conditions as opposed to laboratory dilution conditions. Real-time plume measurements for NOx, particle number concentration and size distribution were made and emission control performance was evaluated on-road. Tests were conducted at highway speeds with ultra-low sulfur diesel fuel, and the results were compared to tests without an emission control system. It was shown that the 4-way emission control system was capable of reducing particle emissions by more than 99 % to levels not detectable above background. Simultaneously, NOx emissions were reduced between 80 and 90 %.
Citation: Kittelson, D., Watts, W., Walker, A., and Twigg, M., "On-Road Evaluation of an Integrated SCR and Continuously Regenerating Trap Exhaust System," SAE Technical Paper 2012-01-1088, 2012, https://doi.org/10.4271/2012-01-1088. Download Citation
Author(s):
David Kittelson, Winthrop Watts, Andrew Walker, Martyn Twigg
Affiliated:
Univ. of Minnesota - Twin Cities, Johnson Matthey Plc
Pages: 11
Event:
SAE 2012 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Diesel Exhaust Emission Control, 2012-SP-2324
Related Topics:
Exhaust gas recirculation (EGR)
Emissions control
Selective catalytic reduction
Nitrogen oxides
Particulate matter (PM)
Exhaust emissions
Control systems
Diesel / compression ignition engines
Diesel fuels
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