How a Fuel Injector Works? Why is it more efficient than carburettor?

Efficiency is a very important aspect in all walks of life. A motorcycle engine has to be efficient. A lot of factors determine how an engine performs.

Engineers while designing a motorcycle try to get the most out of the fuel and air combustion. For the combustion to be perfect there should be 14.7 part of air for 1 part of fuel. Too much fuel, and there won’t be complete combustion, too less fuel, and you lose power.

How does a Fuel Injector work?

A fuel injector is like a mini-computer. It has to do a lot of calculations. For example, different amounts of fuel will be needed if the engine is hot or cold, if you are at sea level or at higher ground where air is thinner, if you are accelerating or decelerating.

So, based on crank position, throttle position, atmospheric pressure, intake air pressure, air temperature, engine temperature and lean angle, the Electronic Control Unit (ECU) calculates the exact amount of fuel to be sent.

Rest is done just by a nozzle with a valve, which can be opened or closed very precisely.

Where did a carburettor go wrong?

Carburettors aren’t as versatile as fuel injectors. Carburettors are completely mechanical, their primary job is to mix air and fuel in a certain fixed ratio. You can only change the ratio by physical adjustments to the carburettor jets. It can not understand and change the ratio as per a certain situation.


As per BS VI emission standards, every vehicle manufacturers have already shifted to fuel injectors. Carburettors are outdated.

Fuel injectors are versatile, give more power and are more efficient.

Now, you don’t need to know all this to make a decision, you might not have an option.

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