Up to now pollutant emissions was not considered a problem in the field of marine engines. However, the International Maritime Organization (IMO) is agreed with the legislation that the NO emission of the marine engine produced from 2000 will be reduced to the present level of 70 percent. In this paper, the combustion simulation model, initially developed for high-speed, direct injection diesel engines, is used for studying the performance and emission characteristics of the 2-cycle, slow speed diesel engines are presented. In the simulative calculation by which we can able to calculate subsequent spatial and temporal history of most of the parameters, such as burning rate, local temperature, NO emission and soot etc, and according to this information, distribution of liquid fuel's temperature and burning area in the combustion chamber can be described three dimensionally using a 3-D volume rendering application.
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