Ignition apparatus with secondary winding having reduced...

Details Ignition apparatus with secondary winding having reduced... Ignition apparatus with secondary winding having reduced...

2005-01-25

2005-01-25

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

High tension ignition system

Having a specific ignition coil

C123S635000, C336S096000, C336S198000, C336S223000

Reexamination Certificate

active

06845764

ABSTRACT:
An ignition apparatus includes a secondary winding spool having a secondary winding wound thereon. The secondary winding includes a low voltage end and a high voltage end that is configured for connection to a spark plug. The secondary winding at the high voltage end is configured in accordance with a predetermined radial thickness profile taken in the direction from the high voltage end towards the low voltage end. The profile is determined as a function of (1) a reflected voltage associated with the spark gap breakdown of the spark plug and (2) an induced voltage due to magnetic flux coupled through a central core. The profile is determined so as to reduce layer-to-layer voltage levels in the secondary winding near the high voltage end. The profile can be wound or can be molded in the secondary spool itself.

REFERENCES:
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