DEVICE FOR ESTIMATING THE LOAD STATE OF A NOX STORAGE CATALYTIC CONVERTER

摘要

A device for estimating the loading state of a NOx storage catalytic converter. The device includes a module for determining the oxygen concentration difference between an oxygen concentration present in the exhaust gas upstream of the NO_X storage catalytic converter and an oxygen concentration present in the exhaust gas downstream of the NO_X storage catalytic converter, and a controller for estimating the loading state of the NO_X storage catalytic converter on the basis of said oxygen concentration difference.