Method of operating a drive device and corresponding drive device

Abstract

A method for operating a drive device with an internal combustion engine and an exhaust gas tract having a storage catalytic converter for purifying exhaust gas, a first lambda probe disposed upstream of the storage catalytic converter and a second lambda probe disposed downstream of the storage catalytic converter, includes determining a lambda value for controlling a mixture composition for the internal combustion engine based on a measurement signal from the first lambda probe and an offset value. The offset value is determined with a trim control when a measurement signal of the second lambda probe is in a normal operating range of values, and is adjusted in a regeneration period, during which the storage catalytic converter regenerated, with a predetermined correction value when the measurement signal of the second lambda probe is outside the normal operating range of values. A corresponding drive device is also disclosed.

Dependencies are inferred from the claim text.