Conversion of carburetted engine to fuel injection system

Ramli, Mohamad Norsyahmi (2018) Conversion of carburetted engine to fuel injection system. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Since 21st century, the carbureted engine has been used for many type of vehicle especially cars and motorcycle. Carburettor is a main component that used as a fuel delivery system for automotive engine. Even though the cost is low, carbureted engine has some disadvantages such as, it is high fuel consumption, hazardous emission and low operating efficiency. Electronic Fuel Injection (EFI) has been invented to overcome the problems. The EFI system is made to improve the fuel efficiency and decreasing the hazardous emissions. The EFI system was divided into two (2), Port Fuel Injection (PFI) and Gasoline Direct Injection (GDI) for motorcycles. The main components for EFI system were, Electronic Control Unit (ECU), Capacitor Discharge Ignition (CDI), Fuel pump, Throttle body and its sensor, Fuel injector, Intake manifold, High pressure fuel line and wiring harness. Each of the components needs to be connected with the ECU to properly operate. The sensors will give a signal to the ECU and interpreted the data before it making any decision. For example, the amount of air and fuel mixture needed to be calculated before it enters into the combustion chamber and the action will based on the motorcycle performance. The conversion that has been made gave a good result. After the conversion process, the motorcycle has been tested and it passed all the run testing for three (3) different operations.

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