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http://dx.doi.org/10.5916/jkosme.2008.32.3.394

Water Injection/Urea SCR System Experimental Results for NOx Reduction on a Light Duty Diesel Engine  

Nam, Jeong-Gil (Mokpo National Maritime University)
Abstract
The effects of water injection (WI) and urea injection for NOx on a 4-cylinder Direct Injection (DI) diesel engine were investigated experimentally. For water injection, it was installed at the intake pipe and the water quantity was controlled at the intake manifold and Manifold Air Flow (MAF) temperatures while the urea injection was located at the exhaust pipe and the urea quantity was controlled by NOx quantity and MAF. The effects of WI system, urea-SCR system and the combined system were investigated with and without exhaust gas recirculation (EGR). Several experiments were performed to characterize the urea-SCR system, using engine operating points of varying raw NOx emissions. The results of the Stoichiometric Urea Flow (SUF) and NOx map were obtained. In addition, NOx results were illustrated according to the engine speed and load. It is concluded that the NOx reduction effects of the combined system without the EGR were better than those with the EGR-based engine.
Keywords
Water injection(WI); Manifold air flow(MAF); Urea SCR; Tandem(combined water injection/urea SCR) system; Stoichiometric urea flow(SUF); NOx map;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Gieshoff J., Schafer‐Sindlinger A., Spurk P. C., Van Den Tillaart J. A. A. and Garr G., "Improved SCR Systems for Heavy Duty Applications", Society of Automotive Engineers, Inc., 2000, Paper No. 2000-01-0189.
2 Nam, J. G., Choi, J. S., 2005, "A Study on the Characteristics of NOx and another Emission by Water Injection System for a Light‐Duty Diesel Engine", KOSME Vol. 29, No. 6, pp. 628-636   과학기술학회마을
3 R. Lanzafame, "Water Injection Effects in a Single‐Cylinder CFR Engine" Paper Number : 99p-274
4 Nam, J. G. (2007). "The Static Characteristics of a Urea‐SCR System for NOx Reduction in Diesel Engines", Int. J. Automotive Technology 8, 3, 283-288.   과학기술학회마을
5 Tennison P., Lambert C. and Levin M., "NOX Control Development with Urea-SCR on a Diesel Passenger Car", Society of Automotive Engineers, Inc., 2004, Paper No. 2004-01-1291.
6 S. Brusca, R. Lanzafame, "Water Injection in IC‐SI Engines to Control Detonation and to Reduce Pollutant Emissions", SAE 2003-01-1912, 2003.
7 Blakeman P. G., Chandler G. R., John G. A. and Wilkins A. J., "Investigations into NOX After treatment with Urea SCR for Light‐Duty Diesel Vehicles", Society of Automotive Engineers, Inc., 2004, Paper No. 2001-01-3624.
8 S. Brusca, R. Lanzafame,  "Evaluation of the Effects of Water Injection in a Single Cylinder CFR Cetane Engine", SAE 2001-01-2012, 2001.
9 Rinie Van Helden, et al., "Engine Dynamometer and Vehicle Performance of Urea SCR‐System for Heavy Duty Truck Engines", SAE 2002-01-0286, 2002.