Engine aftertreatment system
US-11905873-B1 · Feb 20, 2024 · US
Exhaust gas purification apparatus for internal combustion engine
US9528412B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9528412-B2 |
| Application number | US-201214409122-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 19, 2012 |
| Priority date | Jun 19, 2012 |
| Publication date | Dec 27, 2016 |
| Grant date | Dec 27, 2016 |
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Abstract
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An exhaust gas purification catalyst is recovered from the sulfur poisoning more appropriately. For this purpose, an exhaust gas purification apparatus for an internal combustion engine selectively executes first control in which an air-fuel ratio of an exhaust gas allowed to flow into an exhaust gas purification catalyst is set to be not more than a theoretical air-fuel ratio to remove a sulfur component from the exhaust gas purification catalyst; and second control in which the air-fuel ratio of the exhaust gas allowed to flow into the exhaust gas purification catalyst is set to an air-fuel ratio that is lower than the air-fuel ratio of the exhaust gas set in the first control to remove the sulfur component from the exhaust gas purification catalyst; wherein the exhaust gas purification apparatus for the internal combustion engine comprises a control unit which executes any one of the first control and the second control on the basis of at least one of purification performance of the exhaust gas purification catalyst, a travel distance of a vehicle that carries the internal combustion engine, and a number of times of removal of the sulfur component from the exhaust gas purification catalyst.
First claim
Opening claim text (preview).
The invention claimed is: 1. An exhaust gas purification apparatus for an internal combustion engine, comprising: an exhaust gas purification catalyst which is provided at an exhaust gas passage of the internal combustion engine, for selectively executing: first control in which an air-fuel ratio of an exhaust gas allowed to flow into the exhaust gas purification catalyst is set to be not more than a theoretical air-fuel ratio to remove a sulfur component from the exhaust gas pu…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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 US9528412B2 cover?
- An exhaust gas purification catalyst is recovered from the sulfur poisoning more appropriately. For this purpose, an exhaust gas purification apparatus for an internal combustion engine selectively executes first control in which an air-fuel ratio of an exhaust gas allowed to flow into an exhaust gas purification catalyst is set to be not more than a theoretical air-fuel ratio to remove a sulfu…
- Who is the assignee on this patent?
- Sakurai Kenji, Miyoshi Yuji, Kidokoro Toru, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification F01N3/20. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 27 2016 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).