Device for controlling the current through an inductive consumer, especially a magnetic valve in the fuel metering system of an internal combustion engine
US4345296A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1980 |
| Grant date | Aug 17, 1982 |
| Priority date | — |
| Expiry date | Jun 26, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/1805
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device is proposed for controlling the current through switching devices which function inductively, in particular magnetic valves in the fuel metering system of an internal combustion engine, with which it is possible to control the current during an attracting and maintenance phase. A primary characteristic is a bracketed and controllable constant-voltage source parallel to the base-emitter path of a switching transistor and of a measuring resistor. Furthermore, a threshold switch connected with its positive input to the measuring resistor is coupled with positive feedback, and the negative input of this threshold switch is connected to a voltage divider controllable in accordance with the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.