Method and apparatus for controlling the air-fuel ratio in an internal combustion engine
US6014963A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1998 |
| Grant date | Jan 18, 2000 |
| Priority date | — |
| Expiry date | Dec 2, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2448
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for controlling the air-fuel ratio in an internal combustion engine wherein, when the operating condition of the internal combustion engine has shifted between learning zones, a learning control updates a correction value after the shift is made in accordance with a stand-by function of a control unit to reduce the occurrence of mislearning, perform the correction value updating learning control efficiently and effect the purification of exhaust gases. In the air-fuel ratio controlling method for the internal combustion engine, when the operating condition of the engine has shifted between learning zones, a learning control updates a correction value in accordance with a stand-by function. In the air-fuel ratio controlling apparatus for the internal combustion engine, a stand-by function is added to the control unit so that, when the operating condition of the engine has shifted between learning zones, a learning control for updating a correction value after the shift is conducted in a delayed manner in accordance with a preset wait count. Further, a stand-by function is added to the control unit so that the correction value updates learning control after the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.