Method and device for detecting the presence of an exhaust gas treatment system in an exhaust line of an internal combustion engine
US7937994B2 · kind B2 · utility
0Cited by
3References
10Claims
0Family size
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Key dates
| Filing date | May 15, 2006 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Nov 10, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and device for detecting presence of an exhaust gas treatment system in an exhaust line of an internal combustion engine. The method determines the derivative of the temperature upstream of the treatment system, determines the derivative of the temperature downstream of the treatment system, and compares the downstream temperature derivative with a threshold value for detecting absence of the treatment system using a pre-determined upstream temperature derivative level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.