Method and system for adjusting engine knock background noise of a variable displacement engine
US10746153B2 · kind B2 · utility
3Cited by
25References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2018 |
| Grant date | Aug 18, 2020 |
| Priority date | — |
| Expiry date | Sep 19, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems are provided for operating a variable displacement engine that includes a knock control system. Fuel injection timing and cylinder firing patterns may be adjusted to maintain engine background noise levels so that the presence or absence of engine knock may be more reliably detected. Further, select variable engine displacement modes may be avoided so that engine background noise level changes may be reduced to improve engine knock detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.