Exhaust treatment method and apparatus having particulate filters and scr
US-2024159174-A1 · May 16, 2024 · US
Exhaust purification system of internal combustion engine
US9623375B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9623375-B2 |
| Application number | US-201314108113-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 16, 2013 |
| Priority date | Mar 15, 2010 |
| Publication date | Apr 18, 2017 |
| Grant date | Apr 18, 2017 |
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Abstract
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A method for purifying exhaust gas of an internal combustion engine, including chemically reducing NOx that is contained in the exhaust gas when a concentration of hydrocarbons flowing into an exhaust purification catalyst is made to vibrate within a predetermined range of amplitude and within a predetermined range of period, wherein, during the chemical reduction, the NOx contained in the exhaust gas is reacted with reformed hydrocarbons to produce a reducing intermediate containing nitrogen and hydrocarbons, a reducing action of the reducing intermediate chemically reduces the NOx, and the NOx is chemically reduced without storing nitrates or with storing a fine amount of the nitrates in a basic layer of the exhaust purification catalyst.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for purifying exhaust gas of an internal combustion engine, the method comprising: a first method that comprises: chemically reducing NOx that is contained in the exhaust gas when a concentration of hydrocarbons flowing into an exhaust purification catalyst is made to vibrate within a predetermined range of amplitude and within a predetermined range of period, wherein during the chemical reduction, the NOx contained in the exhaust gas is rea…
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Cross-Sectional Technologies · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- B01D53/9431Primary
Operations & Transport · mapped topic
Mechanical Engineering · mapped topic
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- What does patent US9623375B2 cover?
- A method for purifying exhaust gas of an internal combustion engine, including chemically reducing NOx that is contained in the exhaust gas when a concentration of hydrocarbons flowing into an exhaust purification catalyst is made to vibrate within a predetermined range of amplitude and within a predetermined range of period, wherein, during the chemical reduction, the NOx contained in the exha…
- Who is the assignee on this patent?
- Bisaiji Yuki, Yoshida Kohei, Inoue Mikio, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B01D53/9431. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 18 2017 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).