Operation

OPERATION

The boost pressure positioner receives a PWM signal from the ECM.

At low speed, the boost pressure regulator reduces the flow cross-section of the guide vanes. The speed at which the exhaust gas impacts on the turbine wheel is increased, as a result of which the speed of the turbocharger and thus the charge pressure rises.

At high engine, the boost pressure positioner increases the flow cross-section of the guide vanes. The speed at which the exhaust gas impacts on the turbine wheel is reduced, as a result of which the speed of the turbocharger reduces and the charge pressure drops.