Circuit for piloting an inductive load, particularly for controlling the electro-injectors of a diesel engine
US4950974A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Oct 25, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2034
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A circuit for piloting an inductive load comprises a low-voltage supply, a storage inductor interposed between one pole of the supply and the load, a first electronic switch in parallel with the load, a second electronic switch in series with the load, between the load and the other pole of the supply, a third electronic switch interposed between the first pole of the supply and the junction between the load and the second switch, and an electronic control unit arranged to pilot the switches in a predetermined manner. The storage inductor is permanently connected to the first pole of the voltage supply and a conductive bypass path is provided between the first pole of the supply and the load. The control unit is arranged to cause the second and third electronic switches to open and close successively in counterphase, in order to maintain the current in the load at a predetermined average level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.