Differentiate air fuel ratio between carburetted engine and electronic fuel injection engines control system.
Sr. No.
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Carburetted engine
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Electronic Fuel Injection (EFI) engine
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1 |
Fuel atomization depends upon velocity of air in the venturi.
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Atomization of fuel is independent of cranking speed therefore cranking is easier.
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2 |
Less atomization and vaporization will make the engine more knock prone.
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Better atomization and vaporization will make the engine less knock prone.
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3 |
Amount of fuel added is done by float chamber, needle valve and venturi pressure.
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Amount of fuel added can be adjusted by changing the injector plus width or by increasing fuel pressure
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4 |
Amount of air entering is depends on opening and closing of throttle valve
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Amount of air entering is measured by Mass Air Flow sensor and controlled by ECU.
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5 |
Wall wetting effect occurs in carbureted engine.
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Equal quantity of fuel is supplied to port for each cylinder
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