Experimental research on influence of the pressure of the end compression stroke on exhaust gas emissions of the main diesel engine of fishing vessels
Abstract
The paper presents the results of experimental research on the effect of pressure of the end of compression stroke on concentration of soot and NOx on diesel engines, as a basis for building a set of diagnostic parameters to assess engine technical condition in use. For diesel engines, pressure of the end compression stroke at fuel injection timing directly inter-depends on spray structure leading to change of the formation combustion mixture process and burning fuel, thus affecting two types of engine emissions which are soot and NOx. Experimental research results on 4CHE-Yanmar diesel engines show that, pressure of the end compression stroke is reduced 14% lower than standard, thus soot emissions increases 36,43%, However NOx emissions decreases 22,58%.
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