Exhaust gas purifying method of an internal combustion engine
US4383408A · kind A · utility
8Cited by
11References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1980 |
| Grant date | May 17, 1983 |
| Priority date | — |
| Expiry date | Aug 13, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
At least one electrical signal which indicates an operating condition of an internal combustion engine is generated, and then a first air-fuel ratio feedback control system which controls a carburetor air-fuel ratio and a second air-fuel ratio feedback control system which controls the amount of secondary air supplied into the exhaust system is selectively energized so as to function in accordance with the generated electrical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.