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Oil reserves which are located around the world are declining day by day, so new alternative energy sources must be invented for engines of internal combustion and compression ignition, so biodiesel that is an alternative fuel source for diesel engines and it is a renewable energy resource. Biodiesel is a fuel made from vegetable oils, animals’ fats and waste oils. In this study, physical and chemical properties of biodiesel were analyzed and matched to the diesel fuel. In the experimental study, biodiesel was made from animal fats and compared to diesel fuel. Its effects on engine performance and emissions are studied. A single-cylinder, four-stroke, direct injected diesel engine with air cooling system are used as test equipment in different cycles. After the experimental study, it is concluded that the reduction of the emissions of CO and HC as biodiesel has the advantage of emission output. Environmentalist property of biodiesel is the most important characteristic of it. But the sight of engine performance diesel fuel has more advantage to biodiesel fuel.
PAPER REVISED: 2012-07-31
PAPER ACCEPTED: 2012-09-02
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