SsangYong Korando III (2010 year). Manual — part 375

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c. Input/Output for CDPF control

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Rear temp. sensor:
Measure DPF
temp.

DPF performs
recycling
(combustion)
process at 600C,
and rear
temperature sensor
monitors the
temperature of DPF.

Differential pressure
sensor measures the
pressure difference
between pre-CDPF
and post-CDPF (If
PM has been
accumulated, the
measured value is
over the specified
value).

Diff. pres. sensor:
Measure
pressure between
front side and
rear side of CDPF

Injector: Control
post injection

Front temp.
sensor: Measure
DOC temp.

DOC performs
oxidation and
reduction process at
300~500˚C, and
front temperature
sensor monitors the
temperature of
DOC.

Electronic
throttle body:
Control intake air
mass

ECU (DCM 3.7)

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.

T-MAP sensor

Intake air

mass

Exceed PM

limit

Booster

pressure/

temperature

Post injection

Control intake air

mass

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e. Cautions

Use only specified Engine Oil (approved by MB Sheet 229.51) for CDPF.

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1. Use only specified engine oil (Low Ash Oil)

The vehicle equipped with CDPF should use specific engine oil to improve the engine performance

and fuel economy, and ensure the service life of CDPF.

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2. Issue with normal engine oil

Sulfur, one of the contents of engine oil is burned and generates soot that is not regenerated by the

DPF. This remains on the filter as ashes and keeps accumulating. Eventually, this ashes will block the

filter.

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3. Benefit for specified engine oil

Minimized the sulfur content of engine oil which reduces the service life.

Improved fuel economy and emission level of CO2 with high performance and low viscosity.

Increased service life of engine oil with high resistance to temperature.

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4. Problems when using unspecified engine oil

The service life of filter may be reduced by 30% or more by the ashes accumulated on the filter.

The fuel economy may be reduced because of engine rolling resistance, frequent regeneration of

DPF.

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These problems are also caused by oil with high sulfur content, such as tax exemption oil and

heating oil, etc.

*

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3) Input/Output for CAN communication

(1) Configuration of CAN (P-CAN/B-CAN)

CAN Topology communicate with system units. There are two types (P-CAN and B-CAN) of

communication according to the communication speed. Instrument cluster, BCM and diagnostic

connector use both types of communication. And, ECU, ABS & ESP, TCU, GCU, E-coupling and EPS

unit use P-CAN communication because it is faster than B-CAN. The terminal resistances are installed in

ECU and BCM.

Abbreviation

Function

GCU

Glow Control Unit

EPS

Electronic Power Steering Unit

BCM

Body Control Module

SKM

Smart Key Module

TPMS

Tire Pressure Monitering System