Abstract
New combustion and fuel technologies were applied to a multi-cylinder diesel engine to improve both emission and fuel consumption. Performance of the multi-cylinder engine with 3-stage turbo charging system was investigated with JIS#2 diesel and an optimum fuel derived from a previous study to determine engine control parameters for each fuel. Steady-state operations for representative engine speed/load conditions were conducted to clarify the relationship between engine performance and engine control parameters. Also transient-state operations (JE05 mode) were conducted to achieve simultaneous reduction in emission and fuel consumption. The results shows that both emission (NOx < 0.2 g/kWh, PM < 0.01 g/kWh) and fuel consumption (10 % improvement) targeted in this study could be achieved with the optimum fuel as well as JIS#2 diesel. And especially it's clarified that the optimum fuel can simultaneously reduce NOx and PM in contrast to the conventional diesel fuel.
