METHOD FOR CORRECTING AN ESTIMATING MODEL OF A QUANTITY OF NITROGEN OXIDES BEFORE A SELECTIVE CATALYTIC REDUCTION SYSTEM

摘要

The present invention relates mainly to a method of correction of a model (m) of the estimation of a quantity of nitrogen oxides in the upstream side of a system of the catalytic reduction (51) in order to heat engine (3), characterized in that it comprises the following steps: - apply a first strategy (strat _ corr _ 1) by default of correction of the model (m) for estimating the quantity of nitrogen oxides, - detecting a drop of inaccuracy of the model (m) for estimating the quantity of nitrogen oxides in - below a first extreme threshold value (s1), or an increase of the inaccuracy of the model (m) to the - addition of a second extreme threshold value (s2), and - apply a second correction strategy (strat _ corr _ 2) of the model (m) for estimating the quantity of nitrogen oxides which is adapted to the correction of the inaccuracy of the model (m). The present invention also relates to the computer (8) corresponding.