Carburetor engines mix fuel and air in the carburetor, in fuel injector fuel mixes with the air passing through the inlet manifold or port and the fuel/air mixture enters the combustion chamber.

For working of and more info on Carburetor read here.

For working of and more info on Fuel Injection read here.


Fuel Injection

  • Carburetor relies on suction created by intake air accelerated through a Venturi tube to draw the fuel into the airstream.
  • Carburetor does not monitor air fuel mixture ratio.
  • The best fuel to air ratio for each cylinder is approximated for the best performance.
  • Carburetors do last longer than fuel injection systems, and are cheap compared to fuel injectors.
  • Carburetors are also much simpler to install than fuel injection systems, because there are no electrical components or return lines to the fuel tank
  • Fuel injection atomizes the fuel through a small nozzle under high pressure.
  • Fuel injector monitors air fuel mixture, and sends proper ratio of air-fuel mixture into the cylinder.
  • It injects fuel directly to the specific cylinder, using the  specific injector for specific cylinder.
  • They are costlier and are complicated to install as it uses an electrical component and custom cylinder head configuration.
  • They reduce the emission and have a better performance with better fuel efficiency.

Now a days Fuel injection is widely used as it save fuel and gives more power, and moreover it has low emission which is one of the most important factor which should be considered. Yes it is costly and complicated and needs an expert to install and maintain, but that is fine when seeing the emission level and low fuel consumption.

Also published on Medium.

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