Methods and systems for surge control
US-9279374-B2 · Mar 8, 2016 · US
Methods and systems for surge control
US9551276B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9551276-B2 |
| Application number | US-201414460304-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 14, 2014 |
| Priority date | Aug 14, 2014 |
| Publication date | Jan 24, 2017 |
| Grant date | Jan 24, 2017 |
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- Title
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- Abstract
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Abstract
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Systems and methods are provided for reducing surge in a boosted engine system. One method comprises adjusting an opening of a compressor recirculation valve to allow a compressor recirculation flow based on a combination of a nominal compressor recirculation flow and a filtered nominal compressor recirculation flow. The nominal compressor recirculation flow may be calculated as a difference between a desired compressor flow rate based on a surge limit of compressor and an estimated throttle mass flow rate.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for a boosted engine comprising directing additional compressor recirculation flow, in excess of a nominal compressor recirculation flow, from upstream of a throttle to a compressor inlet via a compressor recirculation valve, said additional compressor recirculation flow based on a filtered difference between a minimum desired compressor flow to reduce compressor surge and existing airflow through said throttle. 2. The method recited in claim 1 , wherein said nominal compressor recirculation flow is a difference between said minimum desired compressor flow to reduce compressor surge and said existing airflow through said throttle. 3. The method recited in claim 2 , wherein said additional compressor recirculation flow is a larger amount of either zero or a minimum allowable additional compressor recirculation flow. 4. The method recited in claim 1 , wherein said additional compressor recirculation flow is directed to said compressor inlet due to a change in airflow through said throttle, said change being greater than a threshold. 5. The method recited in claim 4 , wherein said change in airflow through said throttle is a fast decrease in airflow through said throttle. 6. The method recited in claim 1 , wherein said compressor recirculation valve is a continuously variable recirculation valve.
Assignees
Inventors
Classifications
- F02B37/16Primary
by bypassing charging air · CPC title
Controlling engines characterised by their being supercharged · CPC title
with compressors, turbines or the like in the recirculation passage · CPC title
Systems for actuating EGR valves · CPC title
with a single turbocharger · CPC title
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Frequently asked questions
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- What does patent US9551276B2 cover?
- Systems and methods are provided for reducing surge in a boosted engine system. One method comprises adjusting an opening of a compressor recirculation valve to allow a compressor recirculation flow based on a combination of a nominal compressor recirculation flow and a filtered nominal compressor recirculation flow. The nominal compressor recirculation flow may be calculated as a difference be…
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification F02B37/16. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jan 24 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).