Patent ID: 7049923

Claim:
An ignition apparatus comprising: a core formed of magnetically-permeable material extending along a main axis; a primary winding disposed about the core having a first end configured for connection to a power source and a second end being configured to be selectively coupled to a ground node; a secondary winding disposed on a secondary winding spool disposed about the core wherein at least one of first and second ends of the secondary winding is electrically connected to a high-voltage connector terminal configured for connection to a spark plug; a case formed of electrical insulating material; and a magnetically-permeable, electrically-conductive shield disposed inwardly of the case, said shield electrically floating relative to said ground node, wherein said shield is generally cylindrical in shape extending along said main axis, said shield having an opening extending circumferentially and axially relative to said main axis; and wherein said case includes an interior configured to retain a first coil assembly comprising said core, said primary winding, said secondary winding spool, said secondary winding, and said shield, said case further including an exterior surface, said high-voltage connector terminal being substantially surrounded by a tower extending from said exterior surface, said opening of said shield being oriented so as to allow said connection between said secondary winding and said high-voltage connector terminal; second and third coil assemblies each corresponding in arrangement to said first coil assembly, said case being configured to receive said first, second and third coil assemblies.