Boost Pressure Positioner - Operation

OPERATION

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

At low speed, the boost pressure regulator reduces the flow crosssection 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 crosssection 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.