Threshold circuit suitable for use in electronic ignition systems
US4117819A · kind A · utility
17Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1976 |
| Grant date | Oct 3, 1978 |
| Priority date | — |
| Expiry date | Oct 26, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P3/051
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable dwell ignition system comprising a circuit responsive to changes in engine RPM for causing the dwell time of the ignition system to be varied accordingly. The circuit is adapted to be connected to a sensor coil to receive ignition timing signals developed thereacross which are generated in timed relationship to the engine operation. The circuit provides for changing the direct current (DC) level about which the ignition signals are generated such that a threshold level is varied. As the threshold level is varied the dwell time of the system is varied respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.