Air-fuel ratio detection apparatus of internal combustion engine
US7801666B2 · kind B2 · utility
17Cited by
12References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 2008 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Dec 18, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a multi-cylinder engine, to compute the air-fuel ratio of each cylinder by an air-fuel ratio sensor disposed in an exhaust pipe, a cylinder is determined by a crank angle detected by a crank angle sensor. A deviation in the air-fuel ratio of each cylinder is detected on the basis of the output signal of the air-fuel ratio sensor disposed in the exhaust pipe and the forcibly changed quantity of the air-fuel ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.