Patent ID: 8893546

Claim:
A method for evaluating signals of an oxygen sensor, the method comprising: obtaining sensor signals from the oxygen sensor in an air supply channel of an internal combustion engine, the air supply channel being connected to an exhaust gas channel of the internal combustion engine, via an exhaust gas recirculation which has at least one exhaust gas recirculation valve, the oxygen sensor being situated in the air supply channel downstream from the exhaust gas recirculation initiation; correcting the sensor signals as a function of at least one characteristics variable, which describes the dependence of the sensor signals on at least one of (i) one of an oxygen concentration and a variable correlated with the oxygen concentration, and (ii) at least one additional physical variable; at at least one operating point of the internal combustion engine, in response to a closed exhaust gas recirculation valve, outputting signals of the oxygen sensor, and recording and storing the signals and additional operating point parameters; and deriving an adaptation of the characteristics variables of the oxygen sensor, based on the assumption that the gas composition corresponds to that of pure air.