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
US4875447A · kind A · utility
9Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1988 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Mar 31, 2008 |
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 value is calculated as a function of engine operating conditions and a corrected solenoid current control value is determined as a predetermined function of the solenoid current control value. The solenoid valve is controlled as a function of the corrected solenoid current control value. The solenoid valve is controlled by generating a pulse signal having a duty ratio which is a function of the solenoid current control value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.