Air-fuel ratio control system of internal combustion engine
US7474956B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2006 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Sep 13, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0814
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air-fuel ratio control system maintaining constant an oxygen storage amount or oxygen release amount per unit time with respect to an exhaust purification catalyst having an oxygen storage capacity even if the intake air amount changes is provided.An air-fuel ratio control system of an internal combustion engine having an intake air amount detecting means, a linear air-fuel ratio sensor arranged at an upstream side of an exhaust purification catalyst, an O2 sensor arranged at a downstream side of said exhaust purification catalyst, a target air-fuel ratio controlling means for performing feedback control of a target air-fuel ratio of exhaust flowing into the exhaust purification catalyst based on output information from the intake air amount detecting means and the O2 sensor, and a fuel injection amount controlling means for performing feedback control of the fuel injection amount based on output information of the linear air-fuel ratio sensor so as to achieve the target air-fuel ratio, characterized in that the target air-fuel ratio controlling means performs feedback control of the target air-fuel ratio so that even when the intake air amount changes, a correction amount per u…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.