A simulation study on effect of fuel injection pressure in the high pressure pipe on process of combustion mixture formation in the main diesel engine of fishing vessels

Abstract

Fuel injection pressure performance in the high-pressure pipe depends on the high pressure pump and directly affects to spray structure, leading to changes in the process of combustion mixture formation and burning fuel, affects on power and exhaust emissions of engine. Therefore, determining the reduction level of pressure in the high-pressure pipe to timely repair and maintenance of fuel injection systems, especially high-pressure pumps, will help improve working efficiency and prevent incidents for a main diesel engine. The simulation results of AVL Boost/Hydsim software for 4CHE-Yanmar main diesel engine of fishing vessels showed that when the pressure on high-pressure pipe decreased by 12÷14% the spray structure decreased by 14,6%.