Improved control method and apparatus for an oxygen pump cell of a sensor in an internal combustion engine or an exhaust gas aftertreatment system of the engine

摘要

It is described a method for controlling an oxygen pump cell of a sensor in an internal combustion engine or in the exhaust gas after treatment system of such an engine, comprising the step of adding, to a feedback control of the current in the pump cell, a further feed-forward control path estimating an expected oxygen pump current on the basis of characteristics of the exhaust gas composition calculated from engine operation data.