Exhaust treatment method and apparatus having particulate filters and scr
US-2024159174-A1 · May 16, 2024 · US
Exhaust gas purification filter
US2022018273A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022018273-A1 |
| Application number | US-202117487254-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 28, 2021 |
| Priority date | Mar 29, 2019 |
| Publication date | Jan 20, 2022 |
| Grant date | — |
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- Title
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Abstract
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An exhaust gas purification filter includes a honeycomb structure part and sealing parts. The honeycomb structure part has a porous partition wall and a plurality of cells defined by the partition wall to form exhaust gas flow paths. The sealing parts seal alternately a gas inflow-side end face or a gas outflow-side end face of the cells. The exhaust gas purification filter includes fine pores with diameters of 10 μm or less measured by the mercury intrusion method that account for 5% or more of all pores by volume in the honeycomb structure part. The partition wall has a plurality of communication pores communicating between the cells adjacent to the partition wall and has constricted communication pore of which a largest diameter Φ 1 and a smallest diameter Φ 2 satisfy relationships Φ 1 ≥50, 100×Φ 2 /Φ 1 ≤20.
First claim
Opening claim text (preview).
What is claimed is: 1 . An exhaust gas purification filter comprising: a honeycomb structure part that has a porous partition wall and a plurality of cells defined by the partition wall to form an exhaust gas flow path; and a sealing part that seals alternately a gas inflow-side end face or a gas outflow-side end face of the cells, wherein the exhaust gas purification filter includes fine pores with diameters of 10 μm or less measured by the mercury intrusion method that account for 5% or more of all pores by volume in the honeycomb structure part, and the partition wall has a plurality of communication pores communicating between cells adjacent to the partition wall and has constricted communication pores of which a largest diameter Φ 1 (μm) and a smallest diameter Φ 2 (μm) satisfy relationships Φ 1 ≥50, 100×Φ 2 /Φ 1 ≤20, and the proportion of the constricted communication pores in all the communication pores is 20% or more. 2 . The exhaust gas purification filter according to claim 1 , wherein the fine pores are 25% or less of all pores by volume.
Assignees
Inventors
Classifications
Honeycombs · CPC title
Improving ICE efficiencies · CPC title
on a layer of the filter · CPC title
sintered or bonded by inorganic agents · CPC title
Pore size · CPC title
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- What does patent US2022018273A1 cover?
- An exhaust gas purification filter includes a honeycomb structure part and sealing parts. The honeycomb structure part has a porous partition wall and a plurality of cells defined by the partition wall to form exhaust gas flow paths. The sealing parts seal alternately a gas inflow-side end face or a gas outflow-side end face of the cells. The exhaust gas purification filter includes fine pores …
- Who is the assignee on this patent?
- Denso Corp
- What technology area does this patent fall under?
- Primary CPC classification F01N3/0222. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Jan 20 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).