Assembly for controlling the regeneration of a NOx-absorber catalyst within an exhaust gas line of an internal combustion engine

摘要

A downstream end (6) of a nitrogen oxide (NOx) storage catalyst has a three-way coating (7) with a relatively high oxygen storage capacity. The oxygen sensor (5) is located relatively closely to the open end face (8) of the region. Immediately upstream of the oxygen sensor, in flow alignment with it, and in the downstream end of the monolith (3), the catalyst is shortened, leaving a catalytically inactive zone (9').