Method and device for feedback controlling air-fuel ratio of internal combustion engine
US6708681B2 · kind B2 · utility
9Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Jul 5, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/1431
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air-fuel ratio detected by an air-fuel ratio sensor is estimated based on an estimation value of air-fuel ratio of an air-fuel mixture formed inside a cylinder, and based on an air-fuel ratio estimated as being detected by this air-fuel ratio sensor and the air-fuel ratio detected based on an output signal of the air-fuel ratio sensor, the estimation value of the cylinder air-fuel ratio is corrected and a fuel injection quantity is corrected based on the corrected cylinder air-fuel ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.