SsangYong Korando III (2010 year). Service manual — part 69

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ECU (DCM 3.7)

T-MAP sensor

Intake air

volume

Detecting

excess of PM

amount limit

Boost

pressure/

temperature

Front EGT sensor

Measures the temperature of

DOC.

The DOC performs the redox
reaction at between 300 and
500℃ and the front EGT
sensor monitors the
temperature of DOC.

Differential pressure sensor

Measures the pressure values

of before and after the CDPF.

The pressure difference
between before and after the
CDPF is measured by the
differential pressure sensor (If
PM is collected in the CDPF,
the pressure difference
between before and after the
CDPF exceeds the specified
value).

Rear EGT sensor

Measures the temperature of

DPF.

The DPF burns the soot with
hot exhaust gases
(regeneration) at around
600℃ and the rear EGT
sensor monitors the
temperature of DPF.

Injector (C3I)

Controls the post-injection.

Electric throttle body

Controls the intake air

volume.

HFM sensor

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Collecting PM

→ Regeneration

The engine ECU detects the
amount of PM collected by the
information from the
temperature sensors and
differential pressure sensor.
When the soot is accumulated,
the engine ECU performs post-
injection to increase the
exhaust gas temperature and
burns the collected PM at
approx. 600°C.

Oxidation (DOC)

When the exhaust gas enters
into the CDPF assembly, its
CO, HC and PM are reduced
by the redox reaction of the
DOC. The remaining PM is
filtered and collected in CDPF,
and the temperature of the
exhaust gas is increased to
between 450 and 500°C.

5. OPERATING PROCESS

[Configuration and principle of operation]

The exhaust gas

passed through the

exhaust manifold

enters into the CDPF

assembly (at approx
250℃).

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6. OPERATING TEMPERATURE

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7. ELECTRIC CIRCUIT DIAGRAM