Intake manifold tuning valve fuzzy logic diagnostic
US7805984B2 · kind B2 · utility
15Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2006 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Aug 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of diagnosing a malfunction of a tuning valve of an intake manifold coupled to an internal combustion engine is provided. The method includes: commanding the tuning valve to at least one of a closed and an opened position; computing an average deviation of manifold absolute pressure; determining an average deviation threshold using fuzzy logic based on engine speed and airflow per cylinder; comparing the average deviation to the average deviation threshold; and diagnosing a malfunction of the tuning valve based on a comparison of the average deviation and the average deviation threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.