SSANGYONG Korando 2012 Manual page 325

f. Features
As EGR ratio goes up, smoke volume will be
higher. But, this lowers the combustion
chamber temperature and accordingly the
concentration of NOx is decreased. The point
with highest NOx is immediately after TDC.
As EGR temperature goes up, the
concentration of NOx will be higher. Thus, it
is necessary to cool down the exhaust gas.
However, during engine cooled, it may
cause large amount of PM. To prevent this,
the exhaust gas is bypassed the EGR cooler.
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