Spark plug fouling detection for ignition system
US-2015176508-A1 · Jun 25, 2015 · US
Method and system for detection of hot spark plug fouling
US9683535B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9683535-B2 |
| Application number | US-201514755980-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 30, 2015 |
| Priority date | Jun 30, 2015 |
| Publication date | Jun 20, 2017 |
| Grant date | Jun 20, 2017 |
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Abstract
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Methods and systems are provided for inferring spark plug fouling due to accumulation of fuel additives thereon. In one example, an engine controller may infer spark plug hot fouling based on higher than expected exhaust temperatures by correlating the elevated exhaust temperature with late combustion phasing due to additive accumulation. A confidence factor of the spark plug hot fouling detection may be enhanced based on data regarding concurrent misfire and/or pre-ignition events.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for an engine, comprising: indicating spark plug fouling due to accumulation of fuel additive based on an actual exhaust temperature being higher than estimated exhaust temperature, the estimated exhaust temperature based on engine operating conditions including air-fuel ratio, spark timing, and EGR, the indicating spark plug fouling due to accumulation of fuel additive including setting a diagnostic code, the diagnostic code requesting spark…
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Mechanical Engineering · mapped topic
- F02P11/06Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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- What does patent US9683535B2 cover?
- Methods and systems are provided for inferring spark plug fouling due to accumulation of fuel additives thereon. In one example, an engine controller may infer spark plug hot fouling based on higher than expected exhaust temperatures by correlating the elevated exhaust temperature with late combustion phasing due to additive accumulation. A confidence factor of the spark plug hot fouling detect…
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification F02P11/06. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 20 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).