Abstract:
This research was the study of performance of engine that used diesel, biodiesel from Gurjun oil (B100) and biodiesel from Gurjun oil mixing with diesel in the ratio of 10, 15, 20, 50 and 100 by volume as fuel by testing with engine of IVECO, model 8141E Series which was 4 cylinder 4 stroke with 1,000 to 3,500 rpm. From the test it was found that torque and the power of engine that used biodiesel from Gurjun oil (B100) as fuel increased 13.1 - 26.9% and 13.4 - 28.2% respectively. Brake specific fuel consumption increased at 7.1 - 47.9%. The pressure in the cylinders increased. The quantity of black smoke reduced at 30 - 79.1% comparing with the engine that used normal diesel oil as fuel. Using of biodiesel from Gurjun oil made the combustion of the engine to have more efficiency which clearly reduced black smoke and this research also studied production and study viscosity and density of diesel oil, biodiesel from Gurjun oil (B100) and diesel oil mixing with biodiesel from Gurjun oil under standard temperature and low temperature before using in a car. The property of the oil must follow the car exhaust gas emission standard (Euro 6) which was enforced in 2016. According to the Euro 6 standard, the pollution must be released at the temperature of -7 °C. Therefore, study of oil property under such temperature before using with a real car was an interesting thing. In this research, it used diesel oil, biodiesel oil from Gurjun oil (B100), diesel mixing with biodiesel from Gurjun oil in the ration of 5, 10, 15 and 20% under the test standard of ASTM D341 whereas the viscosity and density of the oil was predicted by the equation of Riazi. The research result found that the density of the oil increased when increasing the mixing ratio of biodiesel oil in diesel oil. The result of using equation to predict the density and viscosity of the oil had difference of 2% from the test result.