Apparatus for diagnosing causes of NOx conversion efficiency degradation
US8973431B2 · kind B2 · utility
4Cited by
6References
2Claims
0Family size
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Key dates
| Filing date | Dec 7, 2011 |
| Grant date | Mar 10, 2015 |
| Priority date | — |
| Expiry date | Dec 19, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8158
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for on-board diagnoses of causes of NOX conversion efficiency degradation including: a diagnosis exhaust-pipe fuel injection control unit; a NOX purification device failure specifying unit; and an oxidizing catalyst device failure specifying unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.