SSANGYONG KYRON 2010.01 Manual page 443

▶ Catalytic Converter and Temperature
Purification of Catalytic Converter
▶
Oxygen adheres to catalytic
material : below 180°C
Catalytic converter has the normal function
of purification at a range of the temperature.
Because it has a weak point of decreasing of
the purification rate in the condition of
continuous high temperature, it should keep
the temperature range of 400 to 500°C
normal
becomes better according to the increase of
temperature
temperature. CO purification rate becomes
the best near the temperature of 450°C,
and NOx does so near the temperature of
400 to 500°C.
- Adhesion of soluble organic fraction
(SOF) below 180°C
- Purification of soluble organic fraction
(SOF) over 180°C
Chemical reaction formula
- By catalytic action of two primary catalytic
converter, oxidation occurs in order to
decrease HC and CO.
Catalytic material supplies
each CO and HC with O2 for
their oxidation : above 180°C
2420-01
condition. HC purification
in the normal
SOF(HC)+O2 → CO2+H2O
2CO+O2 → 2CO2
2C2H6+7O2 → 4CO2+6H20
Catalytic material conversion
process by DOC
ENGINE EXHAUST SYSTEM
03-5
for
rate
range of
KYRON 2010.01