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Biofuels are being investigated as potential substitutes for current high  pollutant fuels obtained from the conventional sources. The primary problem  associated with using straight vegetable oil as fuel in a compression  ignition engine is caused by viscosity. The process of transesterifiction of  vegetable oil with methyl alcohol provides a significant reduction in  viscosity, thereby enhancing the physical properties of vegetable oil. The  Kirloskar HA394 compression ignition, multi cylinder diesel engine does not  require any modification to replace diesel by karanja methyl ester. Biodiesel  can be used in its pure form or can be blended with diesel to form different  blends. The purpose of this research was to evaluate the potential of karanja  oil methyl ester and its blend with diesel from 20% to 80% by volume. Engine  performance and exhaust emissions were investigated and compared with the  ordinary diesel fuel in a diesel engine. The experimental results show that  the engine power of the mixture is closed to the values obtained from diesel  fuel and the amounts of exhaust emissions are lower than those of diesel  fuel. Hence, it is seen that the blend of karanja ester and diesel fuel can  be used as an alternative successfully in a diesel engine without any  modification and in terms of emission parameters; it is an environmental  friendly fuel.

The effect of karanja oil methyl ester on Kirloskar HA394DI diesel engine performance and exhaust emissions