SSANGYONG RODIUS 2005.07 Manual page 157

7) Battery Voltage Correction Mode
When battery voltage is low, the ECM can compensate for a weak spark delivered by the
ignition module by using the following methods
- Increasing the fuel injector pulse width.
- Increasing the idle speed rpm.
- Increasing the ignition dwell time.
8) Fuel Cut-Off Mode
No fuel is delivered by the fuel injectors when the ignition is off.
This prevents dieseling or engine run-on. Also, the fuel is not delivered if there are no reference
pulses received from the CKP sensor.
This prevents flooding.
3. EXHAUST SYSTEM
1) Catalytic Converter
The purpose of the catalytic converter is to convert the three pollutants of carbon
monoxide(CO), hydrocarbons (HC) and oxides of nitrogen (NOx) contained in the exhaust of
gasoline engines, into the harmless compounds of water (H2O), carbon dioxide (CO2) and
nitrogen (N2).
The catalytic converter contains a catalyst, a word coming from the Greek and which
designates the element essential for catalyst which triggers chemical reactions without itself
being consumed.
These catalysts in the 3-way catalytic converter are the rare metals platinum (Pt) and rhodium
(Rh).
The catalytic converter consists essentially of three main elements.
The exhaust gases flow through the catalytic converter and, in so doing, coming into contact
with rare metals (Pt and Rh).
The following chemical reaction are produced.
-
CO + O2 → CO2
-
HC + O2 → CO2 + H2O
-
NOx → N2 + O2
09-11
0452-01
ENGINE CONTROL SYSTEM
RODIUS 2005.07