Closed loop fuel control using air injection in open loop modes
US3986352A · kind A · utility
30Cited by
4References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1975 |
| Grant date | Oct 19, 1976 |
| Priority date | — |
| Expiry date | May 8, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1489
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A fuel control for an engine is normally operated closed loop with a feedback signal from an air-fuel ratio sensor in the engine exhaust. However, during idle, wide open throttle and engine warm up operating modes, the closed loop control is cut out and the engine is run rich with air injected into the exhaust system to reduce carbon monoxide and hydrocarbon emissions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.