Quote:
Originally Posted by Isaac Zachary
But with fuel and air entering through the EGR valve NOx will increase since the A/F mix will be stoichiometric with no inert gas like to exhaust gas to lower the combustion temps.
|
Depending on the proportion of fuel enrichment, it won't harm performance, it may actually lead to some improvement. On a sidenote, replacing the so-called inert gas with a gaseous fuel is more likely to decrease NOx, as it will decrease the amount of free oxygen molecules to reach with the nitrogen. A richer AFR is usually more likely to result on lower NOx, regardless of how the supplemental fuel is delivered to the intake tract.