Paper Title
Effect of Butanol on Performance and Smoke Emission of Direct Injection Diesel Engine Fueled by Jatropha Oil and Diesel Fuel with EGR System

Diesel engines are widely used in industry, automotive, power generation due to better reliability and higher efficiency than gasoline engines. However, diesel engines produce high smoke emissions. The main problem of diesel engines is actually the use of fossil fuels as a source of energy in which their availability is diminishing. Therefore, alternative diesel fuel substitutes such as jatropha and butanol are needed to reduce dependence on fossil fuels. In the current study, the butanol effect on the performance and smoke emission of direct injection diesel engine fueled by jatropha oil and diesel fuel with EGR systems was investigated. Performance and smoke emissions of diesel engine were investigated with variation of fuel blends percentages. The percentage of butanol was in the range of 5 to 15%, jatropha was 10 to 30% and diesel fuel was balance. EGR was varied through valve openings from 0 to 100% with 25% intervals. The experimental data showed that the higher percentage of butanol in the fuel blended resulted in a decrease of torque of 5.69%, BTE by 5.31%, EGT by 3.99%, Opacity by 25.4% and BSFC increase by 12.33%. Keywords - Performance, Smoke Emission, Direct Injection, Jatropha Oil, EGR