System for assisting regenerating depollution means integrated in an exhaust system of an engine

摘要

A system for assisting regeneration of depollution means ( 1 ) included in an exhaust system ( 2 ) of a motor vehicle engine ( 3 ) by switching the engine between operation in lean mode and operation in rich mode, depending on various parameters for controlling the operation of the engine, the system being characterized in that it comprises a lambda probe ( 9 ) placed in the exhaust gas outlet from the engine, and means for correcting at least one of the operating parameters of the engine ( 3 ) in order to provide closed-loop regulation of the richness of said exhaust gas about a target value while the engine is operating in rich mode.