Compare carbureted engine fuel supply system with MPFI system.

Compare carbureted engine fuel supply system with MPFI system.
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1 Answer

Answer :

Sr.No.
Carbureted fuel supply system
MPFI fuel supply system
1 Mal-distribution of charge. 
Uniform distribution of charge. 
2 Due to resistance in intake manifold volumetric efficiency is lower. 
Improvement in volumetric efficiency due to less resistance in the intake manifold.
3 Inaccurate metering of charge. 
Accurate metering of charge.
4 Carburetor Icing may take place. 
Formation of ice on the throttle plate is eliminated.
5 Fuel atomization depends upon velocity of air in the venture. 
Atomization of fuel is independent of cranking speed therefore cranking is easier
6 Less atomization and vaporization will make the engine more knock prone. 
Better atomization and vaporization will make the engine less knock prone.
7 Fuel need to be more volatile
Less volatile fuel can be used. 
8 Fuel injection is take place inside the manifold.
fuel being injected into or close to the cylinder. 
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