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Managing engine firing patterns and pattern transitions during skip fire engine operation
US9200575B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9200575-B2 |
| Application number | US-201414203444-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 10, 2014 |
| Priority date | Mar 15, 2013 |
| Publication date | Dec 1, 2015 |
| Grant date | Dec 1, 2015 |
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Abstract
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Various methods and data structures for managing transition between different firing fractions during skip fire operation of an engine are described. In some embodiments, transitions are constrained to occur when firing sequence segments of a designated length are shared by the first and second firing fractions. In a separate aspect, a data structure that uses current firing fraction phase as a first index and a target firing fraction as a second index may be used to determine a phase of the target firing fraction to enter at a transition. Is some circumstances transitions between a current and target firing fraction may be conducted as a series of steps through intermediate firing fractions.
First claim
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What is claimed is: 1. A method of managing a transition between a first operational firing fraction and a second operational firing fraction during operation of an engine in a skip fire operational mode, the first firing fraction having an associated first repeating firing sequence and the second firing fraction having an associated second repeating firing sequence, the method comprising: identifying a firing sequence segment of a designated length that is shared by the first and…
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- F02D17/02Primary
Mechanical Engineering · mapped topic
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- What does patent US9200575B2 cover?
- Various methods and data structures for managing transition between different firing fractions during skip fire operation of an engine are described. In some embodiments, transitions are constrained to occur when firing sequence segments of a designated length are shared by the first and second firing fractions. In a separate aspect, a data structure that uses current firing fraction phase as a…
- Who is the assignee on this patent?
- Tula Technology Inc, Tula Technology Inc
- What technology area does this patent fall under?
- Primary CPC classification F02D17/02. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 01 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).