What is used for making proper fuel-air mixture in spark ignition engine?

What is used for making proper fuel-air mixture in spark ignition engine?

Options:

a. Air filter
b. Carburetor
c. Air mixture
d. None of the above

Correct Answer: b. Carburetor

Explanation:

In the spark ignition engine for proper combustion, the fuel has to be mixed with proper amount of air. Therefore, carburetion process is carried out before fuel enters the combustion chamber. The carburetion process mixes a proper ratio of oxygen with a gaseous form of the fuel like petrol or natural gas. The device used for this process is called as carburetor.

The proper mixture of the fuel and oxygen contained air helps in effective burning of the fuel. This mixture is called as emulsion. Carburetion process involves all the processes such as vaporizing the fuel, mixing it with air and taking this mixture to the chamber where it can be combusted.

Carburetion allows engine to perform at its optimum level of efficiency. Sometimes, when there lots of fuel and very little oxygen available then the mixture is called as 'rich' mixture and it results in smoke formation due to incomplete combustion and wastage of fuel.