Exhaust gas purification device
US11679379B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 2, 2022 |
| Grant date | Jun 20, 2023 |
| Priority date | — |
| Expiry date | May 2, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2510/0684
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The exhaust gas purification device includes a substrate, a first catalyst layer, and a second catalyst layer. The substrate includes an upstream end, a downstream end, and a porous partition wall defining a plurality of cells extending between the upstream end and the downstream end. The plurality of cells include an inlet cell opening at the upstream end and sealed at the downstream end, and an outlet cell adjacent to the inlet cell sealed at the upstream end and opening at the downstream end. The first catalyst layer is disposed on a surface of the partition wall in an upstream region. In a downstream region, the second catalyst layer is disposed inside the partition wall, and a second catalyst-containing wall including the partition wall and the second catalyst layer has a porosity of 35% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.