Fault diagnostic systems and methods using oxygen sensor impedance
US9297843B2 · kind B2 · utility
13Cited by
13References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Apr 5, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1455
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A diagnostic system of a vehicle includes an impedance module and a diagnostic module. The impedance module determines an impedance of a sensing element of an exhaust gas oxygen sensor based on a response of the sensing element to a change in current through the sensing element. The diagnostic module selectively diagnoses a fault associated with the exhaust gas oxygen sensor based on the impedance of the sensing element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.