Exhaust gas purifying method and apparatus for internal combustion engines
US4617794A · kind A · utility
15Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1985 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Jun 3, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Exhaust gas purifying method and apparatus for internal combustion engines in which the temperature of an exhaust gas purifying catalyst is detected and, as desired, oxygen content of exhaust gas is further detected, and in which the actual air-fuel ratio is varied toward the higher air-fuel ratio side and the lower air-fuel ratio side with respect to the theoretical air-fuel ratio, in accordance with the frequency and amplitude preset dependent on the kind of the catalyst and set based on these measured values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.