Abstract
Engine performance, combustion characteristics, and emissions were investigated using a DI diesel engine with FAME fuels such as methyl laurate and methyl oleate. Compared with gas oil operation, the smoke densities and HC emissions with FAME fuels showed significant decreases over the tested load range. To discuss the combustion characteristics of the FAME fuels, basic experiments with single droplets were conducted and the combustion behavior was analyzed by shadowgraph photography. The results show that soot formation of the FAME fuels (oxygenated fuels) is strongly suppressed due to the characteristics of this kind of fuel.
