Ignition coil with optimized thermal stress relaxing member

Details Ignition coil with optimized thermal stress relaxing member Ignition coil with optimized thermal stress relaxing member

2005-12-27

2005-12-27

Nguyen, Tuyen T (Department: 2832)

Inductor devices

With outer casing or housing

C336S096000

Reexamination Certificate

active

06980073

ABSTRACT:
An ignition coil comprises a housing, a rod-shaped center core54arranged substantially at the center within the housing, a thermal stress relaxing member52covering the outer circumferential surface of the center core54, a cylindrical spool4arranged on the outer circumferential side of the thermal relaxing member52with a gap9in between and a resin insulating material8awith which the gap9is filled and which hardens. The thermal stress relaxing member52is wound around the center core54and the thickness of the thermal stress relaxing member52is set to a thickness so that the thermal stress, which is caused by the thermal deformation of the center core54and is applied to the resin insulating material8a, is reduced and reaches a saturation value thereof.

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