Page 1282 - Foton Workshop Manual - Tunland (AT)

ENGINE CONTROL SYSTEM - POSTPROCESSING DIESEL PARTICULATE FILTER (DPF) DIFFERENTIAL
11-56 PRESSURE SENSOR

11
POSTPROCESSING DIESEL PARTICULATE FILTER (DPF)
DIFFERENTIAL PRESSURE SENSOR
HOW IT WORKS

Postprocessing diesel particulate filter (DPF)
differential pressure sensor is mounted besides the
postprocessing diesel particulate filter, is a
combination sensor. It is mainly used to detect the
postprocessing DPF pressure difference and outlet
pressure.The engine control module (ECM) provides
a 5V power supply to the postprocessing DPF
pressure differential sensor through the sensor
power circuit. The ECM also provides a ground to
the sensor circuit.The postprocessing DPF pressure
differential sensor, located on postprocessing DPF
pressure differential sensor signal circuit, provides
a signal to the ECM. The signal voltage of this
sensor will vary according to the pressure difference
between the two sides of postprocessing diesel
particulate filter.The engine postprocessing system
monitors the carbon deposition load in the
postprocessing DPF. Under normal conditions,
postprocessing DPF will clean itself and convert
Carbon deposition into carbon dioxide, nitrogen and
water. Under light load conditions, it may be
necessary to perform a postprocessing DPF fixed
regeneration. The postprocessing differential
pressure sensor and the calculated engine carbon
dioxide output value are used to remove the carbon
deposition load in the postprocessing DPF.

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