Charging pressure control: Notes
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 charge-air-pressure control ensures setting of the right charge-air pressure at any point in time. Depending on the operating point, the charge-air pressure is controlled or regulated. In controlled operation, the charge-air pressure actuator is activated depending on the operating point with pulse duty factors predefined in characteristic maps.
In regulated operation, the actual charge-air pressure is picked up via the charge-air pressure sensor. The DDE control unit uses this to calculate the required pulse duty factor to achieve the specified target charge-air pressure.