Method and device for operating an internal combustion engine
US8489307B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2007 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Sep 15, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a method and device for operating an internal combustion engine with an intake tract, a switching device for modifying an effective intake pipe length and/or an effective intake tract volume is arranged. By a dynamic intake tract model an estimated intake pipe pressure is determined. The dynamic model is adapted dependent on a trimming value. If a switching position modification is controlled, an estimated old position intake pipe pressure on the one hand is determined with the previous switching position and preventing of the adaptive trimming value adjustment and on the other hand an estimated new position intake pipe pressure is determined with the modified switching position and prevention of the adaptive trimming value adjustment and dependent on a correlation check of the estimated old position pressure and the estimated new position pressure with respect to the measured pressure an actual switching position of the switching device is identified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.