INTRODUCTION Today world is marveling at the technological revolution and this has helped the human race but mismanagement has led to various problems on the same hand. Now a day, one of the major burning issues is energy crisis. The Internal combustion engines have revolutionized the world in last hundred years but also contributed significantly towards environmental degradation. Post Kyoto Protocol; there have been considerable efforts to reduce GHG emissions and more emphasis is now given on using clean source of energy. Though, majority of fuels used in IC engines are still petroleum derived fuels despite exhaustive research carried 2013-24-0105 Published 09/08/2013 Copyright © 2013 SAE International doi: 10.4271/2013-24-0105 saefuel.saejournals.org Experimental Investigation of Diesel Engine Fueled with Jatropha Oil Blend with Ethanol Vipul Vibhanshu M.Tech Schlor, DTU Naveen Kumar Chinmaya Mishra M.Tech (Thermal Engineering) Sunil Sinha Harveer Singh Pali Noida Inst. of Engineering Tech. Sidharth Bansal Maharaja Agrasen Inst Of Technology ABSTRACT Dwindling petroleum reserves and alarming level of air pollution has been an issue of great concern in recent times and researchers across the world are experimenting on variety of renewable fuels for meeting the future energy demands. Within the gamut of alternative fuels, biofuels are the most promising and have the potential to mitigate climate change and lease a new life to existing IC engines. The vegetable oils are having immense potential in this context and have been used either in neat or modified form by large number of researchers. Jatropha curcus is a perennial plant and bears non edible oil. The plant is drought tolerant and has been cultivated all over the arid and semi-arid areas for reforestation. In the present study, blends of jatropha oil and ethanol have been prepared in 5, 10, 15 and 20% (v/v) and evaluation of important properties of blends has been carried. The results show that properties are quite similar to diesel fuel. Performance and emission characteristics were evaluated for straight vegetable jatropha ethanol (SVJE) blends. Engine performance (brake specific energy consumption, brake thermal efficiency) and emissions (CO, HC, NOx, and smoke opacity) were measured to evaluate the behavior of the diesel engine running on SVJE blends. It has been found that at part load condition, the brake thermal efficiency and brake specific energy consumption of blends of SVJE were insignificant. HC, CO emissions and smoke opacity were reduced at part load condition. However, there was a decrease in NOx in case of SVJE diesel blends at full load condition. CITATION: Vibhanshu, V., Kumar, N., Mishra, C., Sinha, S. et al., "Experimental Investigation of Diesel Engine Fueled with Jatropha Oil Blend with Ethanol," SAE Int. J. Fuels Lubr. 6(3):2013, doi:10.4271/2013-24-0105. ____________________________________ 951