Spark plug degradation detection
US8683976B2 · kind B2 · utility
15Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Sep 2, 2032 |
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 identifying and indicating degradation of an engine cylinder spark plug. In response to a cylinder misfire event during selected engine operating conditions, followed by an occurrence of a threshold number and/or rate of pre-ignition events in the same cylinder, a controller may determine that the spark plug is degraded. The controller may limit combustion in the cylinder in response to the degradation. Additionally, cylinder pre-ignition mitigating steps may be taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.