Research of diesel soot emission of alternative fuels by combination of engine tests and laser diagnostics

Due to the increasingly stringent regulation of particulate matter (PM) emission, the research of soot emission characteristics in diesel engines has been a hot topic for years. Numerous previous studies reported that the reduction of PM emissions depends on the molecular structure of additives and blended oxygenates. Consequently, in this research, the tests of soot emission on a modified in-line 6-cylinder DAF HD Diesel engine with several selected additive and oxygenates mixed with normal diesel. Then, the measurements of soot distribution of these blends on a stationary co-flow flame equipment has been conducted by Laser-induced incandescence. Finally, comparisons of soot emission characteristics on the engine and soot formation mechanism on the burner of these blends and the corresponding explanations are proposed