Supercharger

 Supercharger-:A supercharger is an air compressor that increases the pressure or density of air supplied to an internal combustion engine. This gives each intake cycle of the engine more oxygen, letting it burn more fuel and do more work, thus increasing the power output.
Power for the supercharger can be provided mechanically by means of a belt, shaft, or chain connected to the engine's crankshaft.
                                                           

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How supercharger work-:Since the invention of the internal combustion engine, automotive engineers, speed junkies and race car designers have been searching for ways to boost its power. ­One way to add power is to build a bigger engine. But bigger engines, which weigh more and cost more to build and maintain, are not always better.