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For several years, ethanol is being used in controlled but unmarked fashion (levels less than 5%) in gasoline worldwide. Several problems associated with ethanol have put a restriction in using gasoline-ethanol blends with higher ethanol percentage, as it is in an existing engine. Changed physico-chemical properties of high ethanol percentage gasoline blend needs several challenges to be overcome in order to harness the potential of high ethanol content in the blend. The present paper highlights the results of investigation carried out with three different ethanol-gasoline blends i.e 10, 30 and 70 % ethanol blended with gasoline (E10, E30 and E70 respectively). An electronically controlled online fuel blending mechanism was designed and developed to ensure correct blending of two fuels in desired percentage.

Biodiesel developed from non- edible seeds grown in the wasteland in India can be very effectively utilized in the existing diesel engines used for various applications. This paper presents the results of investigations carried out in studying the fuel properties of mahua oil methyl ester (MOME) and its blend with diesel from 20% to 80% by volume. These properties were found to be comparable to diesel and confirming to both the American and Indian standards. The performance of mahua biodiesel (MOME) and its blend with diesel in a Kirloskar DAF8 engine has been observed. The addition of MOME to diesel fuel has significantly reduced CO, UBHC and smoke emissions but increases the NOx emission slightly. The reductions in exhaust emissions could help in controlling air pollution. The results show that no significant power reduction in the engine operation when operated with blends of MOME and diesel fuel.