NOx sensor diagnostic system and method
US10267778B2 · kind B2 · utility
12Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2018 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Feb 8, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system includes: a NOx sensor; and a controller configured to: increase an amount of O2 in a chamber of the NOx sensor; interpret one or more values of a parameter indicative an amount of O2 and/or NOx measured by the NOx sensor; determine if the one or more values of the parameter exceed a threshold value; and indicate a failure of the NOx sensor responsive to the one or more values of the parameter do not exceed the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.