Turbocharger System: Notes
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
The turbocharger is a performance part and must not be tampered with. The boost pressure actuator is an integral part of the turbocharger. Tampering with the boost pressure components can reduce durability by increasing cylinder pressure and thermal loading due to incorrect inlet and exhaust manifold pressure. Poor fuel economy and failure to meet regulatory emissions laws may result. Increasing the turbocharger boost WILL NOT increase engine power.
The variable geometry turbocharger varies exhaust gas flow rate. These style turbochargers use the entire exhaust energy to boost efficiency of the turbocharger and the engine. Internal adjustable deflector blades alter the size of the gap through which the exhaust gas flows. By doing so, they adjust the exhaust gas pressure acting on the turbine in response to the required turbine pressure.
The advantages of a turbocharger with variable turbine geometry are:
- Higher charge pressure already in the lower and in upper engine speed ranges.
- Higher torque as a result of improved cylinder charge.
- Reduction in exhaust emissions as a result of an improvement in the air supply of the engine.
- Increased power output as a result of the higher charge pressure combined with a reduced exhaust backpressure and thus improved charge cycle.