Exhaust purification system of internal combustion engine
US8572950B2 · kind B2 · utility
21Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2010 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Mar 15, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In an internal combustion engine, inside of an engine exhaust passage in order from an upstream side, a hydrocarbon feed valve, oxidation catalyst, and exhaust purification catalyst are arranged. On the exhaust purification catalyst, platinum and rhodium are carried and a basic layer is formed. Hydrocarbons are intermittently fed from the hydrocarbon feed valve while maintaining the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst lean. At this time, the feed of hydrocarbons is controlled so as to ensure the continued presence of the reducing intermediate on the basic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.