What is the difference between a carburetor and a fuel injected system?

Carburetor:

• The air and fuel(petrol) enters the carburetor through separate ports assigned for them.

• If undisturbed, they get mixed inside the carburetor at stoichiometric ratio *We can get rich mixture by opening the choke valve.

• After mixing, the air-fuel mixture enters the cylinder through inlet valve during suction stroke.

Fuel injector:

• The fuel injection system consists of a fuel injector (nozzle) whose operation is controlled by electric circuits through sensors. * The Electronic Control Unit (ECU) is used for the control.

• The air from the air filter enters the cylinder through inlet valve during suction stroke.

• The fuel injection begins at the end of compression stroke.

• The fuel is sprayed like moist.

• Due to atomization, the air and fuel get mixed inside the cylinder.

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