METHOD AND DEVICE FOR ESTIMATING THE THERMAL STATE OF A CATALYTIC NITROGEN OXIDE TRAP INSTALLED IN THE EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a method for estimation by means of a physical model, of the thermal state of a catalytic nitrogen oxide trap, installed in the exhaust system of an internal combustion engine, comprising a modelling of the catalytic trap using a chain of perfectly stirred reactors RPAi connected in series and, for a current reactor in said chain, a calculation of the temperature of the substrate Ts of the catalytic trap and the temperature of the gases Tgs within and at the outlet from said reactor, using at least the temperature and the mass flow of the gases upstream of the reactor.