Compensating oxygen sensor aging
AssigneeFord Global Technologies, LLC
InventorsGopichandra Surnilla, Richard E. Soltis, Daniel A. Makled
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Abstract
Various methods are provided for compensating changes in the relation between impedance setpoint and operating temperature in an oxygen sensor. In one embodiment, a method of operating an oxygen sensor comprises adjusting an impedance setpoint based on a change in dry air pumping current of the oxygen sensor.
Claims20
A method of operating an oxygen sensor, comprising:
- adjusting an impedance setpoint of the oxygen sensor based on a change in dry air pumping current of the oxygen sensor.
A method of operating an oxygen sensor, comprising:
- determining an impedance setpoint of the oxygen sensor, the impedance setpoint determined based on a dry air pumping current of the oxygen sensor;
- and
- adjusting a heater coupled to the oxygen sensor during combusting engine operation to achieve a desired operating temperature of the oxygen sensor, the desired operating temperature resulting from application of the impedance setpoint.
A method of operating an oxygen sensor, comprising:
- compensating a change in a relation between an impedance setpoint of the oxygen sensor and a resulting operating temperature of the oxygen sensor by adjusting the impedance setpoint based on a change in a dry air pumping current of the oxygen sensor.
The method of claim of 18, wherein the change in the dry air pumping current corresponds to a difference between the dry air pumping current and a nominal dry air pumping current.
Dependencies are inferred from the claim text.