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AssigneeRobert Bosch GmbH
InventorsKERSTEN WEHMEIER, RONALDI RUSLI, ANDREAS KORING, RICHARD HOTZEL
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The invention concerns a procedure and a device for diagnosing the dynamic of an exhaust gas sensor, which is arranged in an exhaust gas duct of a combustion engine and with which a parameter of the gas mixture that is supplied to the combustion engine is regulated by a control loop. It is thereby provided according to the invention that during a diagnosing period a temporal deflection of a regulation correcting variable for the parameter that is derived from an output signal of the exhaust gas sensor or a temporal course of the output signal of the exhaust gas sensor is used for the diagnosis and that the dynamic of the exhaust gas sensor is assumed in an evaluation algorithm. Thereby an improvement of the on-board diagnosis of the dynamic of the exhaust gas sensor can be achieved and in particular lambda probes, which provide a slowing down of their responding behavior, can be detected early on.
A method of diagnosing a dynamic of an exhaust gas sensor that is arranged in an exhaust gas duct of a combustion engine, wherein a regulated control loop controls the exhaust gas sensor to provide a parameter of a gas mixture that is supplied to the combustion engine, the method comprising:
A device configured to implement a method of diagnosing a dynamic of an exhaust gas sensor that is arranged in an exhaust gas duct of a combustion engine, wherein a regulated control loop controls the exhaust gas sensor to provide a parameter of a gas mixture that is supplied to the combustion engine, the method comprising:
Dependencies are inferred from the claim text.