Circuit for decreasing oscillatoins in the primary winding of an ignition coil of an internal combustion engine
US4382431A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Jan 28, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P3/051
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Oscillations which would normally occur when the current in the primary winding of an ignition coil is limited to a predetermined value prior to ignition are suppressed by use of a feedback resistor. Specifically, the basic circuit consists of the primary winding of the ignition coil connected in series with a Darlington transistor configuration which, in turn, is connected in series with a measuring resistor, at a common point. The input of the current control system is connected to the common point through an additional resistor, while the output of the control circuit is connected to the input base of the Darlington configuration. Oscillations which might otherwise occur are suppressed by the use of a feedback resistor connected between the input and output lines of the control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.