Method and device for diagnosing the operating condition of an internal combustion engine exhaust gas recycling valve
US7100585B2 · kind B2 · utility
2Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2003 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Feb 25, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/05
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for diagnosing the operating condition of an internal combustion engine exhaust gas recycling valve. The method acquires a measurement value of a reference position of the recycling valve at a predetermined time corresponding to a normally closed position of the valve, calculates the difference between the acquired reference value and a reference value acquired during a diagnostic cycle previously carried out, and compares the calculated difference with a threshold value for detecting opening of the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.