Air-fuel ratio variation abnormality detecting device and air-fuel ratio variation abnormality detecting method
US9043121B2 · kind B2 · utility
2Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2013 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Jan 20, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/221
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an engine having a plurality of cylinders in which a plurality of fuel injection valves are provided respectively, fuel is injected at a predetermined injection ratio, and an abnormality of air-fuel ratio variation is detected. If a fuel injection amount of at least one of the plurality of the fuel injection valves is smaller than a predetermined reference value, the fuel injection amount is increased so as to become equal to or larger than the reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.