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Application of Urea SCR to Light-Duty Diesel Vehicles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 24, 2001 by SAE International in United States
Annotation ability available
Event: Spring Fuels & Lubricants Meeting & Exhibition SAE International Fall Fuels & Lubricants Meeting & Exhibition
Diesel vehicles have significant advantages over their gasoline counterparts including a more efficient engine, higher fuel economy, and lower emissions of HC, CO, and CO2. However, NOx control is more difficult on a diesel because of the high O2 concentration in the exhaust, making conventional three-way catalysts ineffective. The most promising technology for continuous NOx reduction onboard diesel vehicles is Selective Catalytic Reduction (SCR) using aqueous urea.
Recent work with urea SCR has involved aftertreatment for the 1.2L DIATA common-rail diesel engine. This engine was used in Ford's hybrid-electric vehicle, the Prodigy, which was developed under the PNGV (Partnership for a New Generation of Vehicles) program. An emission control system consisting of a diesel particulate filter followed by an underbody SCR system was used successfully to meet ULEV emission standards (0.2 g/mi NOx, 0.04 g/mi particulate matter (PM)). Actual measured PM was close to gasoline levels of 1 mg/mi over the FTP. After each FTP, Highway Fuel Economy Tests were performed to monitor fuel economy and study system efficiency at higher exhaust gas temperatures.
|Technical Paper||Review of Vehicle Engine Efficiency and Emissions|
|Technical Paper||A Real-Time Control Framework for Integrated Diesel Engine and Selective Catalytic Reduction System|
|Special Publication||Diesel Emissions Technology|
CitationLambert, C., Vanderslice, J., Hammerle, R., and Belaire, R., "Application of Urea SCR to Light-Duty Diesel Vehicles," SAE Technical Paper 2001-01-3623, 2001, https://doi.org/10.4271/2001-01-3623.
- Heck R.M. Farrauto R.J. “Catalytic Air Pollution Control,” Van Nostrand Reinhold New York 1995
- Luders H. Backes R. Huthwohl G. Ketcher D.A. Horrocks R.W. Hurley R.G. Hammerle R.H. “An urea lean NOx catalyst system for light duty diesel vehicles,” SAE 952493
- Held W. Konig A. Richter T. Puppe L. “Catalytic NOx reduction in net oxidizing exhaust gas,” SAE 900496
- Miller W.R. Klein J.T. Mueller R. Doelling W. Zuerbig J. “The development of urea-SCR technology for US heavy duty trucks,” SAE 2000-01-0190
- Baker D. Hammerle B. Backes R. “Harnstofflogistik zur NOx-Reduzierung von Fahrzeugen (Urea infrastructure for control of vehicular NOx emissions)” Aachener Kolloquium Fahrzeug- und Motorentechnik 2000 Aachen, Ger. October 2000
- Hug H.T. Mayer A. Hartenstein A. “Off-highway exhaust gas after-treatment combining urea-SCR, oxidation catalysis and traps,” SAE 930363
- Koebel M. Elsener M. Marti T. “NOx-Reduction in diesel exhaust gas with urea and selective catalytic reduction,” Combust. Sci. and Tech. 121 1996 85 102
- Pierson W.R. Brachaczek W.W. “Emissions of ammonia and amines from vehicles on the road,” Environ. Sci. Technol. 17 1983 757 760
- Fraser M.P. Cass G.R. “Detection of excess ammonia emissions from in-use vehicles and the implications for fine particle control,” Environ. Sci. Technol. 32 1998 1053 1057
- Kean A.J. Harley R.A. Littlejohn D. Kendall G.R. “On-road measurement of ammonia and other motor vehicle exhaust emissions,” Environ. Sci. Technol. 34 2000 3535 3539
- Gertler A.W. Sagebiel J.C. Cahill T.A. “Measurements of ammonia emissions from on-road vehicles,” Final Report, Coordinating Research Council Project E-52 October 2000
- Houghton J.T. Callander B.A. Varney S.K. “Climate change 1992: The supplementary report to the IPCC scientific assessment,” Cambridge University Press 1992