How Supercharger Works?

A supercharger is an air compressor that increases the pressure or density of air supplied to an internal combustion engine. This is usually done with the help of a compressor or blower known as “supercharger”.  It has been experimentally found that the supercharging increases the power developed by the engine. It is widely used in aircraft engines, as the mass of air sucked in the engine cylinder, decreases at very high altitudes.This happens,because atmospheric pressure decreases with the increase in altitude.This gives each intake cycle of the engine more oxygen,letting it burn more fuel and do more work, thus increasing power.

 Power for the supercharger can be provided mechanically by means of a belt, gear, shaft, or chain connected to the engine's crankshaft.When power is provided by a turbine powered by exhaust gas, a supercharger is known as a Turbo supercharger typically referred to simply as a turbocharger or just turbo.

Following are the objects of supercharging the engines :

1. To reduce mass of the engine per brake power (as required in aircraft engine).
 2. To maintain power of air craft engines at high altitudes where less oxygen is available for combustion.
 3. To reduce space occupied by the engine (as required in marine engines).
4. To reduce consumption of lubricating oil(as required is all types of engines).

 5. To increase the power output of an engine when greater power is required(as required in racing cars and other engines).

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