Catalytic converter
US9597660B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 2014 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Aug 12, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalytic converter (10) includes a base material and a catalyst layer (3). The catalyst layer has a lower catalyst layer (4) and an upper catalyst layer (5). The upper catalyst layer is constituted by a first upper catalyst layer (6) and a second upper catalyst layer (7). The first upper catalyst layer is formed of a first carrier, which is formed of a ceria-containing oxide, and rhodium supported on the first carrier. The second upper catalyst layer is formed of a second carrier and rhodium supported on the second carrier. The second carrier does not contain ceria and is formed of one oxide selected from among zirconia and alumina. A length of the first upper catalyst layer is X % (30 to 70%) of an overall length of the base material. A length of the second upper catalyst layer is 100−X % of the overall length of the base material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.