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A Study on the Effects of NOx Reduction for the Tandem System  

Nam Jeong-Gil (목포해양대학교 기관시스템공학부)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.29, no.6, 2005 , pp. 645-653 More about this Journal
Abstract
The effects of a WI(Water Injection) at the intake Pipe and an urea injection at the exhaust pipe for a 4-cylinder DI(Direct Injection) diesel engine were investigated experimentally The water quantity was controlled by temperature of intake manifold and MAF(Manifold Air Flow). In addition, the urea quantify was controlled by NOx quantify and MAF. Effects of WI system, urea-SCR system and tandem system were investigated for with and without EGR(Exhaust Gas Recirculation). As the results. the SUF(Stoichiometric Urea Flow) and NOx map were obtained. In addition, NOx results can be visualized with engine speed and engine load. It was concluded. therefore, that the NOx reduction effects of the tandem system without the EGR were more than those with the EGR base engine.
Keywords
Water injection; Manifold air flow; Urea-SCR; Tandem(WI+urea-SCR); Stoichiometric urea flow; NOx map;
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