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Characteristic curve and setpoint values

The charging pressure information is sent to the engine control across a signal line. The signal for evaluation of the charging pressure fluctuates depending on the pressure. The measuring range of approx. 0.5 to 4.5 Volts corresponds to a charge-air pressure of 20 kPa (0.2 bar) to 250 kPa (2.5 bar).

Fig 1: Charging Pressure Characteristic Curve Graph
G09872312Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Voltage
2 Charging pressure characteristic curve
3 Pressure

Observe the following setpoint values for the charging pressure sensor:

Size Value
Voltage range for charge-air pressure sensor 0.5 to 4.5 volts
Measuring range for charging pressure 0.2 to 2.5 bar
Maximum output current 10 mA
Temperature range -40 °C to 130 °C