Fossil fuel which is a non-renewable energy
source is ubiquitous in automobiles. The present study
aims to introduce a closed-loop electronic fuel injection
(EFI) system for a 125 cm3 4-stroke gasoline engine,
which tends to efficiently utilize fuel. A compatible
prototype was developed and installed to the existing
motorcycle engine with the aforementioned specifications
in order to carry out experiments. Firstly, same volume of
fuel is supplied to the selected engine with three different
carburetors which are mechanical, EFI and the modified
EFI and the engine was run at the speed of 6000 RPM.
Then, the time taken to burn the given fuel volume was
measured. Secondly, by using the three carburetors, an
emission test was carried out and analyzed the gases
emitted by each case. The results of the first test showed
that the modified EFI system runs longer time compared
to the mechanical system and shows that the system has
better fuel economy. Also, the emission tests showed a
significant reduction in CO and HC emitted by the
modified EFI system compared to mechanical carburetor.
Keywords : About—Electronic Fuel Injection (EFI), Carburetor, Fuel Consumption, Engine.