System and method for determining degradation of an exhaust gas sensor in an engine
AssigneeFord Global Technologies, LLC
InventorGopichandra Surnilla
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Abstract
A system and method for determining degradation of a post-catalyst exhaust gas sensor in an engine is provided. The engine is coupled to one or more exhaust gas catalysts. The method includes generating a first signal from a first exhaust gas sensor disposed downstream of a first catalyst. The method further includes determining an amount of oxygen supplied to one of the catalysts. Finally, the method includes determining degradation of the first exhaust gas sensor based on the amount of supplied oxygen and the first signal.
Claims16
A method for determining degradation of a first exhaust gas sensor utilized in an engine, said engine coupled to one or more catalysts, said method comprising:
- generating a first signal from a first exhaust gas sensor disposed downstream of a first catalyst;
- determining an amount of oxygen supplied to one of said catalysts;
- and,
- determining degradation of said first exhaust gas sensor based on said amount of supplied oxygen and said first signal.
A system for determining degradation of an exhaust gas sensor utilized in an engine, said engine coupled to first and second catalysts, said system comprising:
- a first exhaust gas sensor coupled downstream of said first catalyst generating a first signal;
- and
- a controller operably coupled to said first exhaust gas sensor, said controller configured to determine an amount of oxygen supplied to one of said first and second catalysts, said controller further configured to determine degradation of said first exhaust gas sensor based on said amount of supplied oxygen and said first signal.
Dependencies are inferred from the claim text.