Control device for internal combustion engine
US9528452B2 · kind B2 · utility
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12References
6Claims
0Family size
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Key dates
| Filing date | Oct 26, 2010 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Jun 5, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine executes EGR and controls the air-fuel ratio based on a detected oxygen concentration in the exhaust. An electronic control unit controls the engine such that the detected value for the air-fuel ratio upstream from a front catalyst provided in an exhaust pipe reaches a value indicating a leaner air-fuel ratio when EGR is being executed than when not executed. Therefore, the controlled air-fuel ratio follows shifting of a window to the leaner side in response to execution of EGR, so that the air-fuel ratio is controlled more precisely in response to the execution of EGR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.