SSANGYONG Korando 2012 Manual page 456

(4) Features
1. Determines the ignition timing according to input signal
The ECU always analyzes the following elements when determining the ignition timing.
- Crankshaft position sensor
- Camshaft position sensor
- Coolant temperature sensor
- Intake air temperature/air mass
2. Warm-up of catalytic converter
The ignition timing is retarded for about 20 seconds to operate the catalytic converter according
to the operating temperature under the following conditions:
-
The coolant temperature is 15°C ~ 40°C at starting.
- The idle speed is increased by the idle speed control to help warming up of the catalytic
converter
3. Idle speed control
The ignition timing can be retarded up to 36° or advanced up to 20˚ to help idle speed control.
The ignition timing control can be performed faster than the control through the throttle valve.
4. Fuel cut-off in deceleration
The ignition timing is retarded temporarily to prevent abrupt increase of the torque when the
combustion is restarted.
5. Intake air temperature/coolant temperature
The ignition timing is retarded to prevent knocking if the intake air temperature or coolant
temperature is high. The ignition timing is retarded in the following cases.
-
The intake air temperature is above 30°C.
- The coolant temperature is above 105°C.
The ignition timing retard for intake air temperature and for coolant temperature is added up
for correction.
6. ESP/ASR control mode
The ignition timing is retarded to reduce engine torque as fast as possible under the
ESP/ASR control mode.
7. Knocking control
If knocking occurs in the cylinder, the ignition angle of the corresponding cylinder is
retarded. The coolant temperature is 15˚C to 40˚C when starting.
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