Control apparatus for internal combustion engine
US-2017058855-A1 · Mar 2, 2017 · US
Method and system for ignition coil control
US10519922B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10519922-B2 |
| Application number | US-201816156567-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 10, 2018 |
| Priority date | Nov 22, 2016 |
| Publication date | Dec 31, 2019 |
| Grant date | Dec 31, 2019 |
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- Title
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- Abstract
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Abstract
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Methods and systems are provided for determining an ignition coil dwell time based on an estimated ignition coil temperature. In one example, a method may include estimating the ignition coil temperature based on heat transfer between engine and the ignition coil, heat transfer between ambient and the ignition coil, and internal resistive heating of the ignition coil.
First claim
Opening claim text (preview).
The invention claimed is: 1. A system comprising: an engine, a spark plug coupled to the engine, an ignition coil coupled to the spark plug, and a controller configured with computer readable instructions stored on non-transitory memory for: periodically updating an estimated ignition coil temperature based on a change rate of an ignition coil temperature, wherein the change rate of the ignition coil temperature is a mathematical function of each and every one of an engine temperature, an ambient temperature, and a first dwell time for a most recent spark ignition; and charging the ignition coil with a second dwell time determined based on the updated estimated ignition coil temperature. 2. The system of claim 1 , wherein the controller is further configured to update the estimated ignition coil temperature based on an averaged dwell period current of the ignition coil. 3. The system of claim 1 , wherein the controller is further configured to update the estimated ignition coil temperature at a frequency determined based on a thermal time constant of the ignition coil. 4. The system of claim 1 , wherein the controller is further configured to update the estimated ignition coil temperature based on a vehicle speed. 5. The system of claim 1 , wherein the controller is further configured to updated the estimated ignition coil temperature by weighting the change rate of the ignition coil temperature with a time duration from a most recent update of the estimated ignition coil temperature. 6. The system of claim 1 , wherein the dwell time is determined further based on a battery voltage.
Assignees
Inventors
Classifications
Measuring dwell or antidwell time · CPC title
- F02P9/00Primary
Electric spark ignition control, not otherwise provided for · CPC title
using digital techniques · CPC title
- F02P3/045Primary
for control of the dwell or anti dwell time · CPC title
Control of spark intensity, intensifying, lengthening, suppression (by means of current control in the storage devices F02P3/05, F02P3/09, during starting F02P15/12) · CPC title
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Frequently asked questions
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- What does patent US10519922B2 cover?
- Methods and systems are provided for determining an ignition coil dwell time based on an estimated ignition coil temperature. In one example, a method may include estimating the ignition coil temperature based on heat transfer between engine and the ignition coil, heat transfer between ambient and the ignition coil, and internal resistive heating of the ignition coil.
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification F02P9/00. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 31 2019 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).