Patent ID: 6809621
Filing Date: 2004-10-26
Classification: H01B,H01F,H01T,Y10T

Abstract:
An ignition coil having a case, a rod-like core installed in said case, a cylindrical primary spool disposed substantially coaxially around an outer circumference of said core within said case, a primary coil comprising a wire wound around said primary spool, a cylindrical secondary spool disposed substantially coaxially around the outer circumference of said core within said case, a secondary coil comprising a wire wound around said secondary spool and a resin insulating material filled within said case, said ignition coil being characterized in that;the spool of said primary and said secondary spools which is disposed between said secondary coil and said core and/or which is disposed between said secondary coil and said primary coil comprises a base resin having an adhesive strength to said resin insulating material which is less than that provided by polybutylene terephthalate and an insulation breakdown voltage which exceeds that provided by polyphenylene sulfide.