Adaptive oxygen sensor methods, systems, and software
First Claim
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1. A method comprising:
- evaluating a regeneration event condition;
evaluating a pressure condition;
evaluating an EGR mode condition, wherein the EGR mode condition includes evaluation of an information of EGR valve position and evaluation of a source of the information of EGR valve position; and
controlling initiation of an oxygen sensor learning mode based upon the evaluating a regeneration event condition, the evaluating a pressure condition, and the evaluating an EGR mode condition.
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Abstract
One embodiment is a system operable to control entry of an oxygen sensor into a learning mode. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.
23 Citations
17 Claims
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1. A method comprising:
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evaluating a regeneration event condition; evaluating a pressure condition; evaluating an EGR mode condition, wherein the EGR mode condition includes evaluation of an information of EGR valve position and evaluation of a source of the information of EGR valve position; and controlling initiation of an oxygen sensor learning mode based upon the evaluating a regeneration event condition, the evaluating a pressure condition, and the evaluating an EGR mode condition. - View Dependent Claims (2, 3, 4)
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5. A system comprising:
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an exhaust aftertreatment subsystem; an oxygen sensor coupled to the exhaust aftertreatment subsystem; and a controller operable to command the oxygen sensor to enter a learning mode when an EGR condition is satisfied, wherein the EGR condition includes evaluation of information of EGR valve position and evaluation of a source of the information of EGR valve position, and wherein the EGR condition is satisfied when the EGR valve position is a closed position and the source of the information of EGR valve position is an expected source. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. A computer program product stored on a computer readable medium, the computer program product comprising instructions that, when executed by a computer, cause the computer to:
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evaluate a regeneration conditional; evaluate an exhaust gas recirculation conditional; and control initiation of an oxygen sensor learning mode based upon the evaluating the regeneration conditional and the evaluating the exhaust gas recirculation conditional, wherein the evaluating the exhaust gas recirculation conditional includes evaluating information of an exhaust gas recirculation valve position and a source of information of the exhaust gas recirculation valve position, and wherein the initiation of an oxygen sensor learning mode requires at least that the exhaust gas recirculation valve position is a closed position. - View Dependent Claims (15, 16, 17)
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Specification