ANFIS technique for handling vibration characteristics of a diesel engine fueled by hybrid biodiesel-natural gas

Pollution derived from the use of Diesel fuels led to finding a low emission alternative resource like biodiesel. The use of biodiesel has to improve engine performance and reduce emissions. Using dual-fuel technology (NG and pilot fuel) in compression ignition engines can be considered as another way to improve engine performance as well as reduce engine emissions by the use of alternative fuels. Otherwise, there is no justification for using alternative fuels. The vibration characteristics of an engine caused by the combustion process can be considered as one of the main factors for considering the engine's durability. In the present study, vibration characteristics of a diesel engine fueled by Diesel+NG and B5+NG have been studied. Also, the ANFIS technique has been employed for modeling and estimation of the total engine vibration value. Based on the results, B5 provided a lower vibration compared with Diesel fuel, especially in the dual-fuel systems. This indicated that biodiesel makes more compatible fuel samples for the dual combustion systems. Also, ANFIS could successfully cope with the modeling task with high accuracy and a low deviation from target values. According to the results, the capability of Gaussian MF type for providing the testing phase data was considerably higher than that for the Tri. (about 3.5 %), Trap (about 69.66%) and Gbell (about 65.37%).