Component Description For Temperature Sensor Upstream Of Turbocharger - GF07.04-D-6109HD
ENGINES 651.955/957 in MODEL 906
with CODE (XZ1) Model generation 1
with CODE (MZ0) Blue EFFICIENCY
Location
Shown on engine 651.955
The temperature sensor upstream of the turbocharger is located on the exhaust manifold flange upstream of the turbocharger.
Task
The temperature sensor upstream of turbocharger determines the exhaust gas temperature upstream of the turbocharger.
The determined exhaust gas temperature is used by the CDI control unit (N3/28) to protect the engine and diesel particulate filter (DPF) against thermal overloading.
Input and output signals
Direct output signals
- Change in resistance at the CDI control unit
Design
The temperature sensor upstream of turbocharger consists of a metallic housing with a resistor with positive temperature coefficients (PTC).
Function
The integral PTC resistor in temperature sensor upstream of turbocharger changes its electrical resistance according to the exhaust gas temperature. The change in resistance results in a voltage which is used by the CDI control unit to compute the exhaust temperature upstream of the DPF.
The electrical resistance increases for a PTC resistor as the temperature increases.