Air-fuel ratio control device for an engine
US5146885A · kind A · utility
5Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Oct 31, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/1486
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air-fuel ratio control device for an engine, by which the air-fuel ratio of the air-fuel mixture supplied to the engine is changed. The device set the air-fuel ratio to a lean mixture when the engine load is lower than a set load value and predetermined set speed, and when the engine load become higher than the set load value, or the engine speed exceeds the set speed, the device switches the air-fuel ratio from a lean mixture to a rich mixture to obtain higher engine output. The set load value is varied in accordance with the engine speed such that it is reduced as the engine speed is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.