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
US4745899A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1986 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Oct 20, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2065
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are provided for controlling the solenoid current of a solenoid valve which controls the amount of suction air in an internal combustion engine. The actual solenoid current flowing through the solenoid is detected and a solenoid current control valve is calculated as a function of engine operating conditions. A corrected solenoid current control value is determined as a function of the solenoid current control value and a pulse duration signal is determined as a function of the corrected solenoid current control value. A feedback control term is calculated as a function of the actual solenoid current and the corrected solenoid current control value. Further, a temperature corresponding to the solenoid temperature is detected and a temperature correction value is generated corresponding thereto. A pulse duration output signal is calculated for controlling the operation of said solenoid as a function of the pulse duration signal, the feedback control term, and the temperature compensation value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.