The4190Series Marine Diesel Engine Electronic Control Reform And Matching With Combustion Chamber Research

The energy scarcity and serious environment problems put forward higher requirements formarine diesel engine economy and emissions. The economy and emissions of diesel enginesdepend on the fuel injection system and the combustion process.This paper depending on4190type diesel engine electronic control modification establishesthe combustion model, studies the effect of the fuel injection system and combustion chambershape on diesel engine performance, provides the basis for diesel engine electronic controlmodification and combustion chamber matching.Firstly, the different combinations of electronic unit pump and injector are tested on thepump bench. A couple of combinations are chosen through analysis of experimental data. Thenthe electronic unit pump and injector are installed on diesel engine. The diesel engine is tested onthe bench. An electronic unit pump and injector is chosen through analysis of experimental data.Secondly, this paper uses ESE module coming from the AVL_FIRE software to establish thecombustion chamber geometric model and moving mesh of4190series diesel engine. Thecalculating initial parameters are set by diesel experimental data and the results of BOOSTmodel. The high pressure cycle of diesel engine is simulated by the FIRE model. The correctnessof the model is verified by the curve of pressure experimental data. The3-D flow field incylinder is analysis by model. Combustion chamber shape is optimized according to the cylinderflow field and the formation of resultant. The two kinds of different combustion chamber withthe same volume are designed. The calculation results show that the reducing combustionchamber improves the diesel engine performance.Lastly, the diameter-depth ratio, surface-volume ratio, the transition radius of sidewalls andbottom of reducing combustion chamber are calculated by the model. The transition radius ofsidewalls and bottom is the most influential factor of diesel engine performance, next camediameter-depth ratio and surface-volume ratio smaller...