Individual cylinder fuel control systems and methods for oxygen sensor degradation
AssigneeGM Global Technology Operations LLC
InventorsAndrew P. Bagnasco, Thomas J. Majcher
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Abstract
A system includes an offset determination module and a correction determination module. The offset determination module determines an offset value based on an average response time of an exhaust gas oxygen (EGO) sensor located upstream of a catalyst in an exhaust system. The offset value relates one of a predetermined number of cylinder imbalance values to a cylinder of an engine. The correction determination module determines a fueling correction for the cylinder based on the offset value and one of the predetermined number of cylinder imbalance values.
Claims20
A system comprising:
- an offset determination module that determines an offset value based on an average response time of an exhaust gas oxygen (EGO) sensor located upstream of a catalyst in an exhaust system,
- wherein the offset value relates one of a predetermined number of cylinder imbalance values to a cylinder of an engine;
- and
- a correction determination module that determines a fueling correction for the cylinder based on the offset value and one of the predetermined number of cylinder imbalance values.
A method comprising:
- determining an offset value based on an average response time of an exhaust gas oxygen (EGO) sensor located upstream of a catalyst in an exhaust system,
- wherein the offset value relates one of a predetermined number of cylinder imbalance values to a cylinder of an engine;
- and
- determining a fueling correction for the cylinder based on the offset value and one of the predetermined number of cylinder imbalance values.
Dependencies are inferred from the claim text.