Engine Performance: System: Turbocharger: Operation: Notes
Air is drawn into the compressor through an air inlet duct and the throttle body. It is forced into the intake manifold, where it mixes with the fuel and is injected into the cylinders. As engine load increases and throttle is opened, more air/fuel mixture flows into the combustion chambers. As this mixture is burned, a greater volume of hot exhaust gas enters exhaust system. The exhaust gas is directed into the turbocharger turbine housing where it is used to increase speed of the turbine.
The turbine wheel is connected by a shaft to the compressor wheel. As the compressor speed increases, it compresses the incoming air and forces a denser air/fuel mixture into the combustion chambers. Higher engine power output is the result.