Method for detecting voltage offset in at least one section of a voltage lambda characteristic curve

摘要

The present invention relates to a method for detecting a voltage offset in at least one section of a voltage lambda characteristic curve (18) of a two-point lambda probe placed in an exhaust gas channel of an internal combustion engine with respect to a reference voltage lambda characteristic curve (12) . Information on the current operating condition of the internal combustion engine and information on the expected operating condition with a certain probability is obtained and the expected operating condition is obtained at least for a certain period corresponding to the duration of the detecting process. The composition of the air / fuel mixture supplied to the internal combustion engine is changed only when the information on the current operating condition corresponds to the set value and the information on the expected operating condition corresponds to the set value with the specified probability limit value.