Very nicley put and backed up shadow.
I commend that.
The nox is reduced by reducing the raw gas in the cylinder.
WHich is done by reducing it potential and intorducing unusable mixtures.
So it introduces an incerased intake temp but reduces the output or potential of the mixture,which overall reduces the temps.
I was misunderstood in this situation, thanks for the update.
So an egr reduces the exhaust gasses temp by reducing nox (nitrides of oxygen) from elavated burn temps.
This concept is which makes sense in a weird way since it says throwing something hot into something hot makes it cooler,
I guess 1 + 1 does not always equal 2