Exhaust gas aftertreatment mixer
US-12163456-B2 · Dec 10, 2024 · US
Exhaust gas purification apparatus for internal combustion engine
US9435241B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9435241-B2 |
| Application number | US-201114008258-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 28, 2011 |
| Priority date | Mar 28, 2011 |
| Publication date | Sep 6, 2016 |
| Grant date | Sep 6, 2016 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An object of the invention is to satisfactorily remove solid materials derived from reducing agent and depositing on a wall of an exhaust passage in an exhaust gas purification apparatus for an internal combustion engine equipped with a selective reduction catalyst provided in the exhaust passage of the internal combustion engine and a reducing agent supply apparatus that supplies reducing agent derived from ammonia into the exhaust passage upstream of the selective reduction catalyst. To achieve the object, according to the invention, a fuel supply apparatus that supplies fuel into the exhaust passage upstream of the reducing agent supply apparatus and an ignition apparatus that ignites fuel supplied by the fuel supply apparatus to generate flame are provided. Solid materials derived from the reducing agent are removed by the flame generated by the fuel supply apparatus and the ignition apparatus.
First claim
Opening claim text (preview).
The invention claimed is: 1. An exhaust gas purification apparatus for an internal combustion engine comprising: a selective reduction catalyst disposed in an exhaust passage of the internal combustion engine; a reducing agent supply apparatus that supplies reducing agent derived from ammonia into the exhaust passage upstream of said selective reduction catalyst; a fuel supply apparatus that supplies fuel into the exhaust passage upstream of said selective reduction catalyst; and an ignition apparatus that ignites fuel supplied by said fuel supply apparatus to generate flame, wherein said reducing agent supply apparatus, said fuel supply apparatus, and said ignition apparatus are arranged in such a way that said flame reaches a striking site on the wall of the exhaust passage on which the reducing agent supplied by said reducing agent supply apparatus strikes. 2. An exhaust gas purification apparatus for an internal combustion engine according to claim 1 , wherein said reducing agent supply apparatus, said fuel supply apparatus, and said ignition apparatus are arranged in such a way that said flame reaches said striking site but does not reach said reducing agent supply apparatus. 3. An exhaust gas purification apparatus for an internal combustion engine according to claim 1 , further comprising: a precatalyst disposed in the exhaust passage downstream of said fuel supply apparatus and said ignition apparatus and upstream of said reducing agent supply apparatus, and having an outer diameter smaller than said exhaust passage; and a guide plate that guides flame generated by said fuel supply apparatus and said ignition apparatus to said precatalyst and said striking site.
Assignees
Inventors
Classifications
a flow director or deflector · CPC title
Arrangements for igniting · CPC title
- F01N3/2066Primary
Selective catalytic reduction [SCR] · CPC title
filtering and catalytic conversion · CPC title
General auxiliary catalysts, e.g. upstream or downstream of the main catalyst · CPC title
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Frequently asked questions
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- What does patent US9435241B2 cover?
- An object of the invention is to satisfactorily remove solid materials derived from reducing agent and depositing on a wall of an exhaust passage in an exhaust gas purification apparatus for an internal combustion engine equipped with a selective reduction catalyst provided in the exhaust passage of the internal combustion engine and a reducing agent supply apparatus that supplies reducing agen…
- Who is the assignee on this patent?
- Nakano Takanori, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F01N3/2066. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Sep 06 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).