Exhaust treatment method and apparatus having particulate filters and scr
US-2024159174-A1 · May 16, 2024 · US
Exhaust purification system of internal combustion engine
US9028761B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9028761-B2 |
| Application number | US-201013263660-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 24, 2010 |
| Priority date | Dec 24, 2010 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
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- Title
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Abstract
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In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( 15 ) and an exhaust purification catalyst ( 13 ) are arranged. The exhaust purification catalyst ( 13 ) is comprised of an upstream-side catalyst ( 14 a ) and a downstream-side catalyst ( 14 b ) arranged in series at an interval from each other. The upstream-side catalyst ( 14 b ) has a smaller cross-sectional area than the downstream-side catalyst ( 14 b ). The concentration of hydrocarbons which flow into the upstream-side catalyst ( 14 a ) is made to vibrate by within a predetermined range of amplitude of a 200 ppm or more and within a predetermined range of period of 5 seconds or less, whereby the NO x which is contained in exhaust gas is reduced at the exhaust purification catalyst ( 13 ).
First claim
Opening claim text (preview).
The invention claimed is: 1. An exhaust purification system of an internal combustion engine, the exhaust purification system comprising: an engine exhaust passage; a hydrocarbon feed valve for feeding hydrocarbons arranged inside of the engine exhaust passage; an exhaust purification catalyst for reacting NO x contained in exhaust gas and reformed hydrocarbons arranged inside of the engine exhaust passage downstream of the hydrocarbon feed valve, wherein the exhaust purific…
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Classifications
- F01N3/208Primary
Mechanical Engineering · mapped topic
- B01D53/9477Primary
Operations & Transport · 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 US9028761B2 cover?
- In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( 15 ) and an exhaust purification catalyst ( 13 ) are arranged. The exhaust purification catalyst ( 13 ) is comprised of an upstream-side catalyst ( 14 a ) and a downstream-side catalyst ( 14 b ) arranged in series at an interval from each other. The upstream-side catalyst ( 14 b ) has a small…
- Who is the assignee on this patent?
- Umemoto Kazuhiro, Yoshida Kohei, Inoue Mikio, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification F01N3/208. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 12 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).