Combustion and emission of oxygenated fuel blends used in diesel engine

In order to synergistically boost applications of ethanol and biodiesel from biomass, the economy, power and emissions of the ethanol-diesel-biodiesel blends in different proportions were investigated to provide theoretical and experimental basis for the promotion and application of mixed oxygenated fuels. The results show that cylinder pressures of three fuel blends are slightly lower than that of neat diesel. The corresponding crank angle of peak pressure in cylinder of EBD1 (80% diesel+20% biodiesel) is about 1°CA in advance. The addition of ethanol makes the pressure peak of EBD2 (70% diesel+20% biodiesel+10% ethanol) and EBD3 (55% diesel+20% biodiesel+25% ethanol) slightly delayed. The heat release peaks of three fuel blends are lower than that of neat diesel with the increase of biodiesel and ethanol in fuel blends, the heat release heats all decline in different degrees. With the increase of oxygen content in fuel blends, both HC and CO emissions decline in different degrees, and smoke emissions also decrease apparently, while NOx emission increase slightly.