Vibration analysis of a common rail diesel engine using biodiesel: A case study

Biodiesel is a renewable fuel that manufactured from vegetable oils and fat tissues. Biodiesel is mixed with diesel fuel and then is used in combustion engines. The main merit of biodiesel is its less pollution in comparison to pure diesel fuels. A significant property of diesel fuels during the combustion process is high noise and vibration. Worldwide many researchers worked on vibration of biodiesel and its blends with diesel. Consequently, in this study, evaluation of vibration was performed for biodiesel blends of the proportions ranged from 20% soybean oil to 80%. For this, a common rail diesel engine of capacity is 1248cc, was used. It has found that most of vibration accelerations were rising between 1800 and 2000 rpm. Results showed that the total vibration values are reduced significantly after servicing the engine by 12%. Statistical analysis of data showed that the vibration was lowest for B40 and B20. The results showed that the vibration of the diesel (D100) is less than biodiesel (B100). Finally, at different engine speeds, vibration was always consistent with power-torque curve. © 2019 School of Science, IHU. All rights reserved.