Functional description

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Strain gauge are used for detecting the pressure. A steel membrane equipped with strain gauge in the sensor is deformed by the adjacent pressure. The changes in resistance in the strain gauge are electronically detected by a Wheatstone bridge and evaluated. The measured voltage is then included as an actual value in the charge-air-pressure control.

Fig 1: Identifying Charging Pressure Sensor And Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Item	Explanation
1	Charging pressure sensor
2	4-pin plug connection
3	Charge air cooler