Abstract

The study of reducing NOx emission without increasing specific fuel oil consumption was conducted using medium bore size 4-stroke low speed diesel engine. Engine performance simulation was done before engine test. Designed parts owing to the calculation result were evaluated by means of a test on a 6 cylinder engine (bore: 340mm, stroke: 680mm, rated engine speed: 280min-1) . From these studies, practical technique of reducing NOx emission and specific fuel oil consumption was found, and this improved NOx emission level is within IMO NOx regulation. This paper reports these engineering findings.

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