How does nitrogen oxide perform in internal combution engines?

There are several different "Oxides of Nitrogen" commonly formed in a internal combustion engine.

In laymen's language: Nitrogen will not normally bond with oxygen.

Modern engines burn fuel and Air at very very high temperatures and pressures. When Oxygen and Nitrogen are subjected to this the Oxides are formed.

The way they stop this is by Adding a little Exhaust gas to the intake air, this lowers the `Peak Burn Temperatures` just enough to reduce this. The diesel truck `DEF` fluid system does this also

If you need a scientist to explain the chemistry state that you need that type explination