Unregulated emission characteristics of common rail diesel engine fueled with butanol-diesel blends

Unregulated emissions of CO2, CH4, N2O, SO2 and aldehydes were tested on a common rail China stage V diesel engine fueled with diesel (D100) and butanol-diesel blends. Without any modification to the engine, five different blends were tested to analyze the effect to unregulated emission by the ratio. The volume ratios of butanol were 0, 10%, 20%, 30% and 50% respectively. The results show that in comparison with D100, the blends' emission of CO2, N2O, SO2 and aldehydes increase and all of them present a trend of rise under the full load condition.With the ratio increasing, all of the fuels have a low emission of CH4. At the maximum torque speed 1400 r·min-1 and rated speed 2200 r·min-1, the blends' emission of CO2, N2O, SO2 and aldehydes increase with the increasing of the load, CH4 is below 1.0×10-6.