Capacitor discharge ignition method and apparatus
US4095577A · kind A · utility
Inventor
Key dates
| Filing date | Mar 2, 1976 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Mar 2, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A capacitor discharge ignition circuit, adapted for retrofitting conventional breaker point ignition systems, provides gating of the electronic switch and spark advance responsive to an electrical signal generated by the magneto coil of the conventional system and provides force commutation of the electronic switch and a selective engine shut-off. Gating of the electronic switch is induced by a voltage drop of a fixed magnitude following a wave peak of the magneto coil signal. An inductor in series with the capacitor and the electronic switch induces a reverse bias across the electronic switch following the gating thereof to force commutate the switch. Engine shut-off may be achieved by grounding the relatively low voltage induced in the magneto coil, which, during engine operation, is stepped up for charging the capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.