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Objective of the current study were to improve the performance of formula student engine by using electronic injection system. In this work, carburetor was substituted by the electronic fuel injection system which Arduino Mega 2560 microcontroller was used as electronic control unit (ECU). The performance of the carburetor and fuel injection (FI) engine were investigated in this work. The results showed that the volumetric efficiency, brake torque, bmep and brake thermal efficiency of FI engine were higher than carburetor engine. Whereas the brake power of both engine was not different. The fuel mass flow rate obtained from the FI engine at the all throttle position opening was lower than the carburetor engine. The bsfc of FI engine was lower than carburetor engine in engine speed range of 4,000-8,000 rpm. However, the bsfc of the both engine was little different in engine speed range of 8,000-10,000 rpm.
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