Air-fuel ratio control apparatus for internal combustion engine
US7162862B2 · kind B2 · utility
18Cited by
9References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2002 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Jun 18, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air-fuel ratio control apparatus estimates, on the basis of an exhaust air-fuel ratio of exhaust gas flowing into an exhaust purifying catalyst unit disposed in an exhaust passage of an engine, an emission of at least one specific component contained in exhaust gas flowing out of the exhaust purifying catalyst unit. The air-fuel ratio control apparatus performs the estimation by use of a model, and controls the air-fuel ratio in such a manner that the estimation value reaches a target state. The model is previously determined in consideration of the mass balance of the specific component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.