The Effect of Sunflower Oil Methyl Ester Blends on a DI Diesel Engine Performance and Emissions

Renewable alternative fuels have forefront of researchers' interest today in view of reduction HC, CO and soot emissions and as the same time improvement of the performance in diesel engines. Among these alternative fuels, biodiesel has a lot of advantages such as high oxygen content, utility without modification near-diesel energy content and low sulfur content. In this study, the effects of sunflower oil methyl ester obtained by the transesterification methods diesel blends on the DI diesel engine performance and emission parameters were investigated experimentally. Experimental studies were carried out using as a fuel diesel and mass-produced diesel-biodiesel blends B10 (10% biyodisel+90% pure diesel), B20 and B50 at under full load conditions and different engine speeds. It has been obtained that when the B10 and B20 of biodiesel blends were used in engine as a fuel engine effective power and torque increases, but B50 blends using engine effective power and torque decreases according to the standard situation. The maximum increase was achieved with the use of B20 blends. It has been determined that if this fuel (B20) was used, HC, CO and smoke emissions considerable decreased and NO emission increased according to standard engine values