METHOD OF ESTIMATING ENGINE-OUT NOx MASS FLOW RATE
US-2015354428-A1 · Dec 10, 2015 · US
Method and apparatus for monitoring performance of EGR heat exchanger
US9109518B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9109518-B2 |
| Application number | US-201213478219-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 23, 2012 |
| Priority date | May 23, 2012 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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An internal combustion engine is equipped with an EGR system that includes an EGR heat exchanger. A method for monitoring the EGR heat exchanger includes monitoring an EGR gas inlet temperature to the EGR heat exchanger, an EGR gas outlet temperature from the EGR heat exchanger, a coolant temperature and a mass EGR flowrate through the EGR heat exchanger for a present engine operating point. An actual thermal effectiveness of the EGR heat exchanger for the present engine operating point is determined. A maximum heat transfer coefficient for the EGR side of the EGR heat exchanger is determined for the present engine operating point. The EGR heat exchanger is regenerated when the actual heat transfer coefficient differs from the maximum heat transfer coefficient for the present engine operating point.
First claim
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The invention claimed is: 1. Method for monitoring an exhaust gas recirculation (EGR) heat exchanger for an internal combustion engine, comprising: monitoring an EGR gas inlet temperature to the EGR heat exchanger, an EGR gas outlet temperature from the EGR heat exchanger, a coolant temperature, and a mass EGR flowrate through the EGR heat exchanger for a present engine operating point; determining an actual thermal effectiveness of the EGR heat exchanger for the present engine…
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Frequently asked questions
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- What does patent US9109518B2 cover?
- An internal combustion engine is equipped with an EGR system that includes an EGR heat exchanger. A method for monitoring the EGR heat exchanger includes monitoring an EGR gas inlet temperature to the EGR heat exchanger, an EGR gas outlet temperature from the EGR heat exchanger, a coolant temperature and a mass EGR flowrate through the EGR heat exchanger for a present engine operating point. An…
- Who is the assignee on this patent?
- Balestrino Sandro R, Warey Alok, Szymkowicz Patrick G, and 2 more
- 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 Aug 18 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).