Carbureted vs Fuel Injected Engine | REVIEWS
"Let’s find out the difference between a carburetor vs a fuel-injected motorcycle."
Fuel-injected motorcycles are quickly taking over carbureted ones, which ruled the roost until the beginning of the new millennium. Almost every premium motorcycle comes fitted with a FI system, as things stand today. Let’s find out the difference between a carburetor vs a fuel-injected motorcycle.
Carburetor
The most basic and until recently, the most prevalent fuel system used in two-wheelers, especially in Nepal, is the carburetor. To explain the basic working of a carburetor, think of it as a tube that feeds an air-fuel mixture into the cylinder from one end, with an air filter attached to another. Now, somewhere in the middle of this tube, the air passage area is restricted to increase the velocity of the air passing through. This little area or part of the carburetor system is known as the venturi. By increasing the velocity of the air through the narrow area, a low-pressure pocket is created, which in turn facilitates drawing fuel from a jet placed near the venturi through suction.
The fuel jet mounted near the venturi draws its fuel directly from the fuel tank through a float chamber, which is a small fuel reservoir, with a float valve that when it is completed, cuts the fuel supply and resumes when the jet draws fuel from it. Then the resulting mixture of air-fuel is supplied to the cylinder where combustion takes place.
This is a very simple description of how a carburetor functions, while modern carburetors are usually more complicated in nature, like constant velocity or CV carburetors. To control the air-fuel mixture, these carburetors make use of components such as a diaphragm, needle valve, and pilot jet.
Advantages of carburetor
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They cost less and are easy to manage.
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Carburetors allow the users to tune them to their requirements.
Disadvantages of carburetor
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Not efficient system.
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Old dated design.
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Air-fuel mixture fluctuates, affecting engine smoothness.
Fuel injection
A Fuel Injection system is composed of a complex series of electronics and sensors, unlike carburetors. The fuel is pulled from the tank in carbureted systems, while in a Fuel Injected system it relies on a fuel pump mounted within the tank for fine-grained control over the fuel flow. In the combustion chamber, the fuel injection nozzle also goes directly inside. In the case of FI devices, the pressurized fuel is very well atomized as a homogeneous mist, facilitating very efficient and safe combustion.
Advantages of fuel injection
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Optimized air-fuel mixture and atomization allow for cleaner, more efficient combustion.
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Better throttle response.
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Better fuel efficacy and more power.
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They do not easily breakdown.
Disadvantages of fuel injection
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They are more expensive than a carburetor.
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Cannot be repaired by a simple tool, which is expensive
So though, considering its cost, the benefits of a FI system are pretty obvious, you'd still be one of the millions who still put their trust in the good old carb. It’s all about the preference of the people after all.
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