Turbocharger - Gasoline: Description
The turbocharging system is mounted on right side of engine. It includes an air vane meter, turbine/compressor assembly, plenum chamber, air throttle body assembly, and wastegate. Turbine is spun by exhaust gas and causes compressor to draw air. Air from compressor is blown through air throttle body assembly, then into intake manifold.
Maximum manifold pressure (boost) is controlled by an exhaust by-pass valve called a wastegate. Operation of the wastegate is controlled by a spring-loaded diaphragm called an actuator. The actuator senses intake manifold pressure to determine how much exhaust should be routed to turbine wheel. Any excess exhaust gas is by-passed around turbine wheel and into exhaust system, thus providing turbine speed limiting feature.