Experimental Investigation on effect of EGR on Performance and Emission Characteristics of Biodiesel (Karanja) Fueled Engine

Abstract—Transtesterified fuels (biodiesel) from vegetable oils are alternative fuels for diesel engines. However several studies reported that diesel engine fueled with bio-diesel emits more NOx emissions. To meet diesel vehicular exhaust emission norms worldwide, several exhaust pretreatment and post treatment technique have been employed in diesel engine. This project aims at experimental investigation on effect of EGR in performance and emission characteristics of a diesel engine fueled with biodiesel. The performance and emission parameters were studied with different EGR valve opening 5%, 10 % and 15% respectively. The results shows that, engine emits NOx when fueled with bio-diesel (without EGR). It is due to long hydrocarbon chain and lack of oxygen content. With increase in EGR flow rates; there will be reduction in NOx was observed. But hydrocarbon emission, CO, CO2 were increased slightly at high loads. Whereas there is no major variation in brake thermal efficiency was observed. Index terms- diesel engines, biodiesel, EGR, emission. I