Abstract
In this study, safflower based biodiesel produced in the pilot plant were blended with certain amounts of diesel fuel and bioethanol from sugar beet. Diesel fuel and the blends were tested in a direct injection diesel engine and engine performance, combustion and exhaust emission characteristics were investigated. According to test results, the brake specific fuel consumptions of biodiesel blend were about 8.51% higher than diesel fuel. Bioethanol is increased brake specific fuel consumptions values up to 26.77%. The maximum cylinder gas pressure of biodiesel blend was about 0.46% higher than that of diesel fuel on average. This value was decreased about 1.75% with using of bioethanol. The exhaust emission results showed that biodiesel blend decreased carbon dioxide emissions and smoke opacity, while it increased nitrogen oxide emissions and exhaust gas temperature. Nitrogen oxide emissions, smoke opacity and exhaust gas temperature values were decreased with adding bioethanol, while it increased carbon dioxide emissions.
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