Variable Turbine Geometry Turbocharger

The turbocharger is the device that supplies hot, compressed air, that is from the turbine/impeller created from the passing exhaust gas or ram air, to the engine to increase the power. Quick compressed air from this turbocharger expands with high temperature and causes decreasing of charging efficiency into the cylinder because density of oxygen gets lower. However charging efficiency into the cylinder increases as compressed hot air is cooled and density of air gets higher through the charge air cooler. It brings also higher fuel efficiency as well as lower CO2 emissions. Charge air cooler which is installed on top of radiator in front of car makes compressed hot air cool by airflow through the radiator grill. With the variable turbine geometry turbocharger the boost pressure is optimized in all engine conditions.