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Home >> BMW >> 2012 >> 535xi GT >> Repair and Diagnosis >> Engine Mechanical >> Fuel System >> Engine Performance - Functional Description -- F07 >> Engine Performance - Functional Description >> Fuel Low-Pressure Sensor >> Functional description
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Functional description

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 electric fuel pump actuation.

Fig 1: Fuel Low-Pressure Sensor And Plug Connection
G09872463Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Fuel low-pressure sensor
2 three-pin plug connection
3 Fuel delivery line
4 High pressure pump, cylinders 5 to 8
5 High pressure pump, cylinders 1 to 4
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