Abstract
The main objective of this investigation was to study the dual fuel operation of ethyl esters of Jatropha curcus and ethanol by fumigation experimentally. The ethyl ester was prepared from the non-edible J. curcus oil using the transesterification process. The experimental study was carried out in a single cylinder direct injection diesel engine. The inlet air was heated to 75° C by a heating coil heated at a constant rate by using a closed loop control of the loading rheostat and a cut-out relay. In the experimental set-up, ethanol was injected into the hot inlet air very near the intake manifold. The results show an appreciable reduction in smoke and sulphur dioxide (SO2) emissions, a slight increase in hydrocarbon and carbon monoxide emissions, and a slight reduction in NOx emissions at part loads, with an appreciable increase in the performance compared with neat diesel and neat ethyl esters.
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