High efficiency voltage doubling ignition coil for CD system producing pulsed plasma type ignition
US4677960A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1984 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Dec 31, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/125
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A capacitive discharge pulsed plasma ignition system which is suitable for retrofitting to standard automobile engines, and easily adaptable to new engines, including diesel engines, which has been substantially improved by using a novel ultra-high efficiency ignition transformer (coil) (3) with an optimized high current and high voltage output. The ignition is preferably used with a high pulse rate, high efficiency, multiple pulse ignition box providing rapid pulsed plasma ignition sites. The coil (3) has a low winding turns ratio of about 40, low primary (1,11) and secondary (2,12) inductances and resistances, low loss in its core (3a), low secondary capacitance (5), and is used in conjunction with a capacitor (4) of capacitance between 1 and about 20 microfarads. The system uses voltage doubling at the spark gap (9) through coil/capacitor design combination to fire a wide spark gap (9) and provide a very high current. The spark current has a high spark energy and long effective duration through rapid pulsing at a high duty cycle of the spark gap (9) with the pulse rate chosen to optimize ignitability for any engine system. When the high efficiency coil (3) and capacitor (4) are …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.