Ignition coil used for an internal combustion engine
US5692483A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1996 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | Jul 1, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/086
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Two separate iron cores 31 and 32, forming a magnetic path, are engaged with both ends of a cylindrical coil body 12. Each iron core has upper and lower limbs disposed in parallel with each other. Cylindrical coil body 12 accommodates a primary coil 221 and a secondary coil 223 therein, and has a core-insertion hole 4 for receiving the iron cores 31 and 32. The upper limb of each iron core is inserted in core-insertion hole 4 while lower limb extends along an outer wall of cylindrical coil body 12, so that cylindrical coil body 12 is engaged with iron cores 31 and 32 by these upper and lower limbs clamping between an inside wall of core-insertion hole 4 and the outer wall of cylindrical coil body 12. Primary coil 221 has an outermost layer formed into a dense alignment winding layer at its end part and into a non-dense alignment winding layer at its middle part. A connector la is integrally formed with a coil casing 1 of coil body 12, so as to extend in a direction perpendicular to an insertion direction of an ignitor 211 and closely to an opening portion of an ignitor housing 213 formed in coil casing 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.