SIMULATION STUDY ON NOX REDUCTION VIA NITROGEN ENRICHED AIR (NEA) ON DIESEL ENGINES

Abstract

This paper presents the study results of NO_X reduction on diesel engine by mean of providing nitrogen enriched air (NEA) method. NEA provided to the engine by a nitrogen injector which is placed on intake manifold. The mass flow of nitrogen injected to intake air was controlled to archive proportion of nitrogen in intake air greater than 20% by mass. The results show that NEA could decrease NO_X emission; CO emission was decreased and soot emission was constant, while as the brake power of the engine improved slightly.