Feedback control system for recirculation of exhaust gas
US4168683A · kind A · utility
27Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1977 |
| Grant date | Sep 25, 1979 |
| Priority date | — |
| Expiry date | Nov 17, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas recirculation control system for an internal combustion engine, in which a feedback signal representing the amount of actually recirculated exhaust gas is produced by detecting the concentration of either CO.sub.2 or H.sub.2 O, which is contained in the exhaust gas in a nearly constant concentration, in combustible gas mixture diluted with recirculated exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.