GF09.40-P-4020TU Component Description For the Boost Pressure Positioner

GF09.40-P-4020TU Component Description For The Boost Pressure Positioner







Location
The boost pressure positioner is located on the turbocharger.

Task
The boost pressure positioner is actuated by the CDI control unit (N3/9) and changes the position of guide vanes in the turbocharger and thus the boost pressure. Boost pressure control of the turbocharger improves the torque characteristics in full-load operation and gas cycle under partial-load conditions. The specified value for the boost pressure depends on the following influencing factors:
- Engine speed
- Quantity injected
- Coolant temperature
- Intake air temperature
- Atmospheric pressure

Design
The boost pressure positioner consists of an actuator motor and an electronic unit.

Function
An adjusting shaft is turned via a worm drive which is connected with the guide vanes in the turbocharger.