METHOD OF ESTIMATING ENGINE-OUT NOx MASS FLOW RATE
US-2015354428-A1 · Dec 10, 2015 · US
EGR rate determination method and control device for internal combustion engine
US8991367B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8991367-B2 |
| Application number | US-201013521668-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 23, 2010 |
| Priority date | Mar 23, 2010 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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The present invention makes it possible to accurately determine an EGR rate from an in-cylinder pressure. An EGR rate determination method for an internal combustion engine according to the present invention, a combustion period is calculated by using in-cylinder pressure data measured by an in-cylinder pressure sensor. An in-cylinder flame velocity is then calculated from the combustion period. Next, in accordance with prepared data indicative of the influence of an engine speed on the flame velocity, a portion of the flame velocity calculated from the combustion period that is affected by the engine speed is eliminated. Eventually, a current EGR rate is determined from the flame velocity from which the portion affected by the engine speed is eliminated.
First claim
Opening claim text (preview).
The invention claimed is: 1. A control device for an internal combustion engine having an in-cylinder pressure sensor and an actuator capable of changing an EGR rate, the control device comprising: means for calculating a combustion period by using in-cylinder pressure data measured by the in-cylinder pressure sensor; means for calculating an in-cylinder flame velocity from the combustion period; means for eliminating, in accordance with prepared data indicative of a proportio…
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- F02D21/08Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F02M25/0753Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US8991367B2 cover?
- The present invention makes it possible to accurately determine an EGR rate from an in-cylinder pressure. An EGR rate determination method for an internal combustion engine according to the present invention, a combustion period is calculated by using in-cylinder pressure data measured by an in-cylinder pressure sensor. An in-cylinder flame velocity is then calculated from the combustion period…
- Who is the assignee on this patent?
- Sano Takeshi, Yasuda Hiromichi, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F02D21/08. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 31 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).