Exhaust treatment method and apparatus having particulate filters and scr
US-2024159174-A1 · May 16, 2024 · US
Exhaust purification system of internal combustion engine
US8955313B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8955313-B2 |
| Application number | US-201113379467-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 18, 2011 |
| Priority date | Feb 18, 2011 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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Abstract
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An exhaust purification system of an internal combustion engine, which includes: a silver-alumina-based catalyst, which is arranged in an engine exhaust system and, when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, releases adsorbed NO 2 at a first set temperature and adsorbed NO at a second set temperature, a secondary air feed passage configured to suppress a temperature rise of the silver-alumina-based catalyst; and an electronic control unit, that: controls the air flow through the secondary air feed passage to: when the silver-alumina-based catalyst has reached a third set temperature, suppress a temperature rise of the silver-alumina-based catalyst to maintain the silver-alumina-based catalyst near the third set temperature, and then lift the suppression of the temperature rise of the silver-alumina-based catalyst so that at least part of the NO adsorbed at the silver-alumina-based catalyst, is oxidized to NO 2 to be adsorbed at the silver-alumina-based catalyst.
First claim
Opening claim text (preview).
The invention claimed is: 1. An exhaust purification system for an internal combustion engine, the exhaust purification system comprising: a silver-alumina-based catalyst, which: (i) comprises a base material, a carrier formed thereon, and silver oxide, (ii) configured to be arranged in an engine exhaust system and, (iii) when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, releases adsorbed NO 2 at a first set temperature and releases adsorb…
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Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
- F01N3/0814Primary
Mechanical Engineering · mapped topic
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- What does patent US8955313B2 cover?
- An exhaust purification system of an internal combustion engine, which includes: a silver-alumina-based catalyst, which is arranged in an engine exhaust system and, when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, releases adsorbed NO 2 at a first set temperature and adsorbed NO at a second set temperature, a secondary air feed passage configured to suppres…
- Who is the assignee on this patent?
- Matsuo Junichi, Nishioka Hiromasa, Oshikawa Katsuhiko, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification F01N3/0814. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Feb 17 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).