Apparatus for controlling the electric current through an inductive consumer, in particular through a fuel metering valve in an internal combustion engine
US4339781A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1980 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Nov 14, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2058
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus is proposed for controlling the electric current through inductive consumers, in particular through a fuel metering valve in internal combustion engines, this apparatus representing a two-point closed-loop controller and functioning with a single threshold switch for an upper and a lower threshold. The apparatus includes one current-measuring resistor each in the freerunning circuit and in the main current circuit, both measuring resistors being members of a voltage divider between the two supply voltage lines and whose middle junction is carried to the threshold switch. By means of a resistor-diode network in combination with the threshold switch, a correction can be made in the individual switching thresholds in accordance with supply voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.