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Abstract
Fuel injection pressure and pressure of the end compression stroke directly affect to spray structure, and changethe process of combustion mixture formation and burning fuel, and affecton power of engine. Therefore, determining reduction level of fuel injection pressure and pressure of the end compression stroke to timely repair and maintenance of fuel injection systems, especially high-pressure pumps, injector, piston, segment, cylinder would help improve working effi ciency and prevent incidents for main diesel engine. The simulation results by Matlab Simulink software for 4CHE-Yanmar main diesel engine of fishing vessels showed that, if the fuel injection pressure decreased by 14% and pressure of the end compression stroke decreased by 12%, the power decreased by 17.2%.
Keywords: fuel injection pressure, pressure of the end compression stroke, injector, fuel spray structure, power of diesel engine, diessel engine of fishing vessel.