Simple Carburetor: Why We Should Not Use Simple Carburetor in Engine

(Last Updated On: 02/09/2017)
The engineering definition of carburetion is “The process of breaking up the fuel into minute particles and mixing it with air”. A Simple Carburetor can also do this very well.
The fuel is completely broken into minute particles, vaporized and mixed with air in the proper ratio on a device known as a carburetor.
Though in theory, everything is perfect in practice it may not happen every time. There are some limitations in use of carburetor in some applications. Below I am going to share some of them.
simple carburetor
  • So, The Drawbacks of a Simple Carburetor are

01) At a very low speed, the mixture supplied by a Simple Carburetor is so weak that it will not ignite properly. And for its enrichment, at such conditions, some arrangement in the carburetor is required to be made.

02) The working of a simple carburetor is affected by changes in atmospheric pressure.

Carburetors used in aircraft are to be provided with altitude control. As the rich mixture is unnecessarily available, due to less density of air.

Simple Carburetor

03) The working of a simple carburetor is affected by changes in atmospheric temperature.

If the setting is done in the winter season, it will be found to give the too rich mixture in the summer.

This is happened due to less density of air with the rise of temperature to a greater extent than the density of the fuel.

04) It gives the proper mixture at only one engine speed and load, therefore, suitable only for engines running at constant speed increase or decrease, the quantity of fuel issuing out will change and not match the velocity of air flowing through the venturi and proper mixture is not take place.

To overcome these various modifications have to be made in the simple carburetor.

05) In a simple carburetor, the mixture is weakened when the throttle is suddenly opened. Because of Inertia effect of the fuel which prevents the proper quantity of fuel from flowing immediately.

Can we still use Simple Carburetor?

To overcome above limitations there are some modifications are made and developed new kind of carburetors. These new carburetors are available in the market now.

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