DD15 Fuel Rail Pressure Sensor

The fuel rail pressure sensor uses a sensor element and a hybrid element. As pressure increases the sensor membrane will distort. There are four pressure-dependent resistances (strain measuring resistors) on the sensor membrane. Its bridge circuit is supplied with voltage by an electronic analysis system which also serves for signal amplification and signal correction. The electronic analysis system itself is supplied a 5 V DC voltage by the MCM. The resistors in the sensor membrane are arranged in a way that when deforming the sensor membrane two resistors will contact and two resistors will expand. Contracting and expanding changes the electrical resistance and in turn has effects upon the measurement voltage, which is being applied to the electronic analysis system. The electronic analysis system amplifies the measurement voltage, compensating for possible temperature fluctuations or balancing out possible manufacturing tolerances and passes the cleaned measurement voltage to MCM.‪

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