Phase-based misfire detection in engine rotation frequency domain
US8091410B2 · kind B2 · utility
4Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2009 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jul 22, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1015
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A misfire detection system monitors engine speed fluctuations in the engine rotation frequency domain and identifies misfire when a phase angle locks onto a stable value rather than fluctuating randomly. After misfire detection, the system also performs cylinder or cylinder pair identification using predefined phase angle regions, where the identification process incorporate knowledge of what phase angle region a locked phase angle falls within.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.