Electronic fuel injection (EFI)

Electronic Fuel Injection (EFI) is a substitute for the conventional metering system which mixes the air and fuel in the correct ratio before feeding it down to the main cylinder to power the vehicle.

Usually in a bike a carburetor is responsible for carrying out this task. But, the downside of using a carburetor is that it has fixed settings and it has certain limitations. To overcome this negative aspect of a new system has been introduced. However, for this brand new system to work, it needs data from several sensors. These sensors include an engine speed sensor, temperature sensor, voltage sensor, throttle position sensor, oxygen sensor and an air flow sensor. The data collected from the various sensors are send to the Electronic control unit (ECU). The ECU makes use of the data provided from the sensors to determine the spark advance, the length of spark and other parameters. Then the exact air fuel mixture for that particular instant is fed into the cylinder which in turn delivers optimum power and clean exhaust. All this process is done continuously and happens many times in every second.

A cross section of a fuel injector is shown below:

Electronic fuel injection

Typical EFI components:

1)     Injectors

2)     Electronic control module (ECU)

3)     Fuel pressure regulator

4)     Fuel pump

5)     Wiring harness

6)     Sensors


1)        Although the electronic fuel injection is much more complicated than a carburetor, it is much more efficient.

2)     Fault finding is easy with the right tools


1)     Higher cost than carburetor.

53 thoughts on “Electronic fuel injection (EFI)

its a good idea but i am just thinking about the construction and conditions of working but require more info with views.

Good brief and this fill someone in on helped me alot in my college assignement. Thanks you on your information.

this is very interesting concept.Basically my aim is to produce the more effective fuel injectio method.so try to give more information this.

i want to full report on this Electronic fuel injection (EFI) system & i hv trying to my bike
so pls gv me detail with image

hey your blog design is very nice, neat and fresh and with updated content, make people feel peace and I always like browsing your site.

– Norman

Your seminar and project topics are amazing. Please I need a detailed diagramatic explanation of the EFI with calculations related to flow and design considerations.


Sorry for my bad english. Thank you so much for your good post. Your post helped me in my college assignment, If you can provide me more details please email me.

this efi good for final year project? i want its cost for doing this is my final year project. please reply me and guide me. thank you.

only because of its cost we can’t ignore its qualities as compared to carburetor. and till the date its one of my favourite project and surely i will make work on it

thanks for this help

I want to change carberator to EFI in my bike.what i want to do. . . Pls send full detail and workings &block diagrams etc. . .

It’s good and enhancing my knowledge more..
can u give some more details for further…..
thank u so much..
keep it up..

Great and very interesting post.. Excellent for my final year project, please give more details sir..
Thank you so much..

plz snt ful info.abt EFI. b’coz am doing tis as my project.plz help me th pics nd working

I have a project for final year of mechanical engineering students.
Interested may contact.
The title of project is “Gear cutting Attachment on Lathe”.
Its a special Fixture which when attached on a lathe m/c can be used to cut profiles of gear.
Thus we do not need milling machine for that.
This is locate in PUNE.
Contact 9021658656

i would like to do a project on efi in two wheelers…will u pls send me the cost estimation of this project and will it be more efficient then using carburator.

sir, i have selected this as my final year project title.it is my request from you to please send me the necessary details regarding this.

its nice i need complete inf regarding it , iam dng it has a project , so giv me d inf as soon as possible…….

please I always wanted to make it as a final year project but i don’t know the procedure to make it. Please send me the procedure how to create an electronic fuel injection project . It will be a great help.
Reply as soon as possible Its urgent
Thanks in advance

This is a wonderfull idea… i need full information about dis topic for my final year project…. so thank uuuuuuu


i want to make this project so plz sent more information & help to make this project as working model plz….


This concept very nice… pls send full details with image in my mail address… bcz i try my final yr project

Hello sir the concept of this project idea is very nice and very interesting please kindly forward me the details i want to do my project on this. so please forward me further details and pdf ,documentary thanking you sir

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