Adaptive cam angle error estimation
US9752524B2 · kind B2 · utility
1Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2014 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | Dec 8, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0411
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems for correcting cam angle measurements for engine-to-engine build variation are disclosed. In one example, a method comprises learning cam angle corrections to update a measured cam angle responsive to air-fuel ratio errors during selected conditions, and learning air and fueling errors responsive to the air-fuel ratio error otherwise. In this way, cam angle errors due to engine build variation may be corrected, thereby improving other air and fuel adaptation methods and improving engine emissions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.