2012 SSANGYONG NEW ACTYON SPORTS Service Manual

13-8
3) Control Logic
The EGR system controls the EGR amount based on the map values shown below:
Main map value: Intake air volume
Auxiliary map value: ※
※
Compensation by the coolant temperature
Compensation by the atmospheric pressure: Altitude compensation
Compensation by the boost pressure deviation (the difference between the requested value
and the measured value of boost pressure)
Compensation by the engine load: During sudden acceleration
Compensation by the intake air temperature -
-
-
-
-
The engine ECU calculates the EGR amount by adding main map value (intake air volume) and
auxiliary map value and directly drives the solenoid valve in the E-EGR to regulate the opening
extent of the EGR valve and sends the feedback to the potentiometer.
(1) Operating conditions
Intake air temperature: between -10 and 50℃
Atmospheric pressure: 0.92 bar or more
Engine coolant temperature: between 0 and 100°C
When there is no fault code related to EGR -
-
-
-
(2) Shut off conditions
Abrupt acceleration: with engine speed of 2600 rpm or more
When the engine is idling for more than 1 minute
Vehicle speed: 100 km/h or more
Engine torque: 380 Nm or more -
-
-
-

14-32412-02
1. SPECIFICATION
Emission Regulation Euro-V
Front Area154.06㎠
SizeDOC 158 X 124 X 78L
DPF 158 X 124 X 195L
CDPF CanisterShell SUS430J1L X 1.5t
End Cone SUS430J1L X 2.0t (Single)
CDPF Catalyst Capacity 4.2L
Material of Filter AT (Aluminum-Titanium Alloy)

14-4
2. CAUTIONS
Standard pattern of soot accumulation ▶
(1) Abnormal Soot Accumulation (2) Normal Soot Combustion
Cautions to protect the catalyst filter ▶
Use the designated fuel only.
Observe the recommended service intervals of engine oil.
Check the engine oil level frequently and add if necessary.
Do not idle the vehicle unnecessarily.
Do not turn off the engine while the vehicle is running.
Do not shift the gear selector lever to neutral when going downhill.
Do not use improper engine oil or fuel additives.
Do not drive for a long time when the warning lamp is illuminated.
Make sure no flammable material, such as dry grass or tissue paper, contacts with the catalyst
filter while the vehicle is parked.
For the vehicles used in urban traffic, driving on the expressways for more than 1 hour at least
once per week is needed so that the PM inside CDPF isn't collected to one side only. -
-
-
-
-
-
-
-
-
-

14-52412-02
The CDPF system enters the regeneration
mode when the driving distance becomes
approx. 600 to 1,200 km (may differ by the
driving condition and driving style). Then, the
engine ECU performs the CDPF regeneration
operation. However, the driver is not informed
with this operation by any engine warning
lamp or vehicle signal, so he/she may not
detect this operation. The control logic at the
post-injection dur-ing the regeneration
process is to increase the fuel injection
volume and control the intake air volume (by
the throttle body) in order to increase the
temperature of the exhaust gas. The driver
may not feel any particular difference from the
vehicle.
Overload of CDPF (warning lamp blinking)
(3) Warning Lamp Related to CDPF
CDPF regeneration process (warning lamp NOT illuminated) ▶
If the CDPF cannot reach the regeneration temperature due to low speed driving or other
reason during the regeneration process, the soot is continuously accumulated in the CDPF.
When this condition continues and the CDPF is overloaded with soot, the engine warning
lamp blinks to inform this situation to the driver.
In order to solve this problem, drive the vehicle at a speed of approx. 80 km/h for 15 to 20
minutes to perform the CDPF regeneration process.
If the engine warning lamp on the instrument cluster blinks, the CDPF is overloaded. In this
case, perform the step 2. 1.
2.
3.

14-6
Excessive overload of CDPF (warning lamp illuminated)
If the vehicle is driven at a speed of 5 to 10 km/h for an extended period of time, the soot
accumulated in the CDPF cannot be burned as the CDPF cannot reach the regeneration
temperature. Then, an excessive amount of soot can be accumulated in the CDPF.
This case is much worse than the simple over-load of the CDPF. To inform this to the driver,
the engine warning lamp comes on and the engine power is decreased to protect the
system.
To solve this problem, blow soot between the engine and exhaust system several times and
erase the related DTC. Then, check if the same DTC is regenerated again. If so, check the
DTC related to the differential pressure sensor. 1.
2.
3.

14-72412-02
1. OVERVIEW
The DOC (Diesel Oxidation Catalyst) generates CO2 and H2O which are harmless through the
oxidation process of CO and HC. And the DPF (Diesel Particulate Filter) collects PM (Particle
Matter) and is regenerated to reduce the quantity of particulates, HC and CO. But there is a
limitation in reducing the emission of exhaust gas for each system, so the CDPF which combines
these two system is applied.

14-8
Differential pressure
sensor
Calculates the amount of
PM collected by reading
the pressure difference
between before and after
the CDPF.Engine ECU
DCM 3.7
Post-injectionThrottle
valve
Regulates the rate of air
intake.
CDPF
DOC+DPFFront temperature sensor
Protects the
turbocharger.
Rear temperature sensor
Measures the
temperature of fuel
combustion.
2. COMPONENT
For details, refer to section "Engine Control". *