SSANGYONG Actyon Sports II 2012.01 Manual page 259

D. Operation process
When the differential pressure sensor detects the pressure difference between the front and the
rear side of CDPF, the sensor sends signal indicating the soot is accumulated and the post
injection is performed to raise the temperature of exhaust gas. The amount of fuel injected is
determined according to the temperature of exhaust gas detected by the rear temperature sensor.
If the temperature is below 600°C, the amount of fuel injected is increased to raise the
temperature. If the temperature is over 600°C, the amount of fuel injected is decreased or not
controlled. When the engine is running in low load range, the amount of post injection and the
amount of intake air are controlled. It is to raise the temperature by increasing the amount of fuel
while decreasing the amount of intake air.
Front EGT sensor: Measure
DOC temp.
Rear EGT sensor: Measure
DPF temp.
Diff. pres. sensor: Measure
pressure between front side
and rear side of CDPF
Intake air
mass
ECU (DCM 3.7)
Exceed PM
Booster
limit
pressure/
temperature
T-MAP sensor
0000-00
Injector: Control post
injection
Post injection
Control intake
air mass
Electronic throttle body
Control intake air mass
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