"The process of increasing the engine power by increasing the density of air entering into the engine is called Supercharging."

Supercharger - explained | The Mechanical post


The process of super charging is done by a Supercharger. the supercharger is a pump like devise which pumps compressed air from the surroundings into the engine. This helps in increasing the efficiency of the engine.

Constrction of the Supercharger.

The main components of the Supercharger are:
  1. Casing.
  2. Impeller.
  3. Diffuser.


Supercharger - explained | The Mechanical post



The casing is the body of the supercharger, which houses the impeller blades, the defuser and the inlet and outlet valves in it. The impeller (blade) is connected to the transmission system, from where it derives power to operate .

Working of the supercharger.

As the transmission system comes into action, when the automobile starts the supercharger starts working simultaneously. As the supercharger is connected to the transmission system, the impeller inside it starts rotating. This causes the air to get compressed due to centrifugal force. The function of the diffuser is to decrease the velocity or kinetic energy of the air and increase its (pressure) density. This dense air is then fed to the engine’s inlet via the outlet of the supercharger.

Advantages of supercharger.
  1. Increase in the volumetric efficiency – As the supercharger feeds the engine with the dense air, more amount of air is sent into the engine this causes in increase in energy in combustion process. Which in turn increases the efficeincy of volumetric engine.
  2. High mechanical efficency – As compared to a naturally aspirated engine the mechanical efficiency of a supercharged engine is greater.
  3. Better fuel economy – Proper combustion is acheived with less amount of fuel ass compared to non-superchargerd engines.