GF14.40-B-3006A | SCR AdBlue temperature sensor, component description | 12.02.16 |
Cumbustion engine 924.9 with Vehicle 368, 384.0, 384.2, 979.2 with CODE MS5 (BlueTec 5)
Cumbustion engine 926.9 with Vehicle 368, 382.17, 382.18, 384.0 with CODE MS5 (BlueTec 5)
B14.40-0063-08
1 Metering unit
Arrangement
The AdBlue temperature sensor (4) is fastened to the outside of the metering unit (1). The metering unit (1) is located close to the last cylinder head cylinder.
4 AdBlue SCR (17B07) temperature sensor
Task
The AdBlue (4) pressure sensor captures the AdBlue pressure at a measuring point inside the metering unit (1) and transmits the information to the engine control module (MR), as an electrical tension signal.
B14.40-0025-11
Composition
The AdBlue (4) pressure sensor consists of a threaded stainless steel housing and an electrical connector.
The inside of the AdBlue temperature sensor (4) contains an NTC resistor as a measuring element. The acronym NTC stands for "Negative Temperature Coefficient" and means that the electrical resistance diminishes with he raise of temperature. The AdBlue (4) temperature sensor is a passive sensor. i.e., it is not supplied with tension.
Function
The AdBlue actuating on the temperature sensor (4) influences, depending on the temperature, the sensor's internal measuring element and, therefore, in the amount of electrical resistance. The variations of electrical resistance are transmitted in defined intervals as analog signals to the control module (MR).
The control module (MR) calculates the corresponding temperature, starting from the resistance values.