Air-fuel ratio control device of internal combustion engine
US7729847B2 · kind B2 · utility
3Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2007 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Feb 16, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The combustion air-fuel ratio is made leaner than the stoichiometric air-fuel ratio at the time of engine startup and the combustion air-fuel ratio is made richer than the stoichiometric air-fuel ratio and the exhaust downstream part of the three-way catalyst apparatus is raised in temperature when it is judged that just the exhaust upstream part of the three-way catalyst apparatus arranged in the engine exhaust system has been raised to the catalyst activation temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.