Denis -
I was able to read the converted PDFs. Thanks. This is a graph I am very familiar with :
(from 1999_165E_impact_of_ecodriving_on_emissions_and_fu el_consumption pdf file)
Under many conditions, the leaner the burn, the higher the NOx.
I do like the idea of an "emissions estimator" in our eco-feedback gizmos :
Because, if we knew our emissions, we could find the "sweet-spot" for FE and emissions :
CarloSW2