Ignition diagnosis using ionization signal
US6998846B2 · kind B2 · utility
13Cited by
26References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Jun 20, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present feature of the invention is generally directed to a subsystem of an ignition diagnostics and feedback control system using ionization current feedback. It utilizes the ionization signal from an ionization detection circuit to monitor ignition parameters, such as primary charge timing, primary charge duration, ignition/spark timing, and ignition/spark duration for future “smart” ignition system control. In addition, the ionization signal is also used to detect spark plug carbon fouling, as well as plug insulator overheating. These parameters can be monitored for every cylinder of the engine for each engine cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.