Patent ID: 9518893
Filing Date: 2016-12-13
CPC Classification: F02D,G01M

Claim Text:
1. A method for determining a dead time in a response characteristic of an exhaust gas sensor for determining an exhaust gas state quantity in an exhaust gas duct of an internal combustion engine, comprising: measuring an output signal of the exhaust gas sensor; determining one an undelayed comparison signal or an undelayed comparison characteristic quantity derived from the undelayed comparison signal; and forming, using a cross-correlation function, a cross-correlation between (i) one of the measured output signal or a characteristic quantity derived from the measured output signal and (ii) one of the comparison signal delayed by a model dead time or the derived comparison characteristic quantity delayed by the model dead time, wherein the model dead time is selected in such a way that the cross-correlation function assumes a maximum, and wherein the dead time of the measured output signal of the exhaust gas sensor is set equal to the selected model dead time.