A Experimental Study on Nitrous Oxide Formation in Direct Injection Diesel Engine

It has been generally recognized that (Nitrous Oxide) emission from marine diesel engines has a close correlation with (Sulfur Dioxide) emission, and diversity of fuel elements using ships affects characteristics of the emission. According to recent reports, in case of existence of an enough large NO(Nitric Oxide) generated as fuel combustion, effect of the emission in exhaust gas on the formation is more vast than effect of the NO. Therefore, formation due to the element operates on a important factor in EGR(Exhaust Gas Recirculation) systems for NOx reduction. An aim of this experimental study is to investigate that intake gas of the diesel engine with increasing of flow rate affects emission in exhaust gas. A test engine using this experiment was a 4-stroke direct injection diesel engine with maximum output of 12 kW at 2600rpm, and operating condition was set up at a 75% load. A standard gas with 0.499%() was used for changing of concentration in intake gas. In conclusion, the diesel fuel included out sulfur elements did mot emit the emission, and the emission in exhaust gas according as increment of the standard gas had almost the same ratio compared with rate in mixture inlet gas. Furthermore, the element in exhaust gas was formed as mixture in intake gas because increment of flow rate in intake gas increased emission. Hence, diesel fuels included sulfur compounds were combined into in combustion, and in exhaust gas should be generated to react with NO and which exist in a combustion chamber.