Available superchargers include blowers or "turbochargers" powered by engines. The turbocharger is the most popular way of supercharging these engines, with the exception of a few small engines.
Exhaust gas expansion is used by turbochargers to pump combustion air into an engine. Another innovation in internal combustion engines of the piston type that boosts performance is the supercharger. It is an air compressor that raises the pressure or density of air that enters the combustion chamber of an engine to facilitate heavy duty operation. The roots style supercharger is the oldest type of supercharger and was first used as an industrial air-moving device in the early 1900s.
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