Onboard diagnostics for anomalous cylinder behavior
US7628007B2 · kind B2 · utility
20Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2006 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Feb 1, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and system of onboard diagnostics in engine emissions monitoring, particularly for detecting anomalous cylinder behavior. In some embodiments, at least one sensor in the exhaust path measures electric charge that is indicative of particulate matter. In some embodiments, at least one sensor measures oxides of nitrogen. The indications of instantaneous emissions can be used to effect real-time adjustments in engine control, and can be logged for maintenance purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.