Fuel supply control apparatus for internal combustion engine and fuel supply control method thereof
US8534265B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2010 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Jul 29, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0604
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a fuel supply control apparatus and a fuel supply control method for controlling an electric fuel pump, in an internal combustion engine provided with the electric fuel pump for pumping fuel to a fuel injection valve and a pressure regulator for regulating fuel pressure at set pressure. When a learning condition of a drive voltage for the electric fuel pump is established, the drive voltage is temporarily reduced and a change amount ΔAF of an air-fuel ratio at the time is detected. Then, if the change amount ΔAF is within a first threshold ΔAF1, the drive voltage is reduced, whereas, if the change amount ΔAF is greater than a second threshold ΔAF2 which is equal to or greater than the first threshold ΔAF1, the drive voltage is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.