Internal combustion engine providing improved exhaust-gas purification
US4089310A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1976 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Apr 8, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1475
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an internal combustion engine having a plurality of sequentially operative combustion chambers, harmful components in exhaust gases are reduced. At least one of the combustion chambers is supplied with a rich mixture having a smaller air-to-fuel ratio than the stoichiometric air-to-fuel ratio and the remaining combustion chambers are fed with a lean mixture whose air-to-fuel ratio is greater than the stoichiometric air-to-fuel ratio. At the point where the exhaust gases emitted from the combustion chambers gather, the total air-to-fuel ratio of the rich and lean mixtures is detected producing a signal representing the total air-to-fuel ratio. One of the rich and lean mixtures is controlled in accordance with the air/fuel ratio signal to maintain the total air-to-fuel ratio practically at a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.