System functions
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
The following graphic illustrates how the air supply works.
| Item | Explanation |
|---|---|
| 1 | Intake temperature sensor and charging pressure sensor |
| 2 | Charge air cooler |
| 3 | Blow-off valve |
| 4 | Twin-scroll turbocharger |
| 5 | Wastegate valve |
| 6 | Pressure converter |
| 7 | Intake-manifold pressure sensor |
| 8 | Electromotive throttle actuator |
| 9 | Engine |
| 10 | Hot-film air mass meter |
| 11 | Intake silencer |
Descriptions of the following air supply system functions are provided:
- Calculation of air mass
- Charging pressure control
- Idle speed control.