Method and apparatus for controlling the solenoid current of a solenoid valve which controls the amount of suction of air in an internal combustion engine
US4771749A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1986 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Oct 20, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2058
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus is provided for controlling the solenoid current of a solenoid valve which controls the amount of suction air in an internal combustion engine. A solenoid current control valve is calculated and a present time value of solenoid current is detected after which a deviation between the present time solenoid current and the solenoid current control value is calculated. A correction value for the present time solenoid current control value is calculated based upon the deviation and a corrected solenoid current control value is determined as a function of the present time solenoid current control value and the correction value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.