SSANGYONG KYRON 2010.01 Manual page 349

05-4
1881-09
2. CDPF (EU-IV) SYSTEM
The CDPF system is only installed to the D27DT engine, and the major changes comparing to
the previous D27DT engine is as follows:
CDPF (Catalyst & Diesel Particulate Filter) and Sensors
As the soot is filtered in the CDPF, the pressure between the front side and the rear side of
the filter is different from each other. If the amount of soot is over 28 g, the soot is burnt in
the CDPF. The combustion is determined depending on the pressure difference, temperature
of exhaust gas and EGR ratio. According to these, the soot filtered by post injection of
injector is burnt at 600°C.
The two temperature
sensors in-side the CDPF
are installed inexhaust
manifold (front exhaustgas
temperature sensor) and
inDOC (rear exhaust gas
tempera-ture sensor), and
perform the fol-lowing
functions.
CDPF
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Differential Pressure Sensor (ΔP sensor)
CDPF Exhaust Gas Temperature Sensor
Front Exhaust Gas Tempera-
ture Sensor:
Measures the exhaust gas tem-
perature of the exhaust manifold.
As it is installed in front of the VGT
turbocharger, it also monitors the
exhaust gas tempera-ture coming
to the turbocharger. If the
temperature of the exhaust gas
flowing to the turbocharger is
higher than the specification, the
engine lowers the exhaust gas
temperature.
Under air cleaner in right side
of engine compartment
Front exhaust gas
temperature sensor
Rear Exhaust Gas
Tempera-ture Sensor:
Measures the increased ex-
haust gas temperature after
the oxidation process of
DOC. If the temperature is
below 600°C, the post
injection amount is
increased to increase the
temperature.