Ignition coil including inorganic insulator exhibiting higher co

Details Ignition coil including inorganic insulator exhibiting higher co Ignition coil including inorganic insulator exhibiting higher co

1994-07-18

1996-08-27

Fleming, Fritz M.

Electricity: electrical systems and devices

Igniting systems

For electric spark ignition

336206, 123634, H01F 2732

Patent

active

055507042

ABSTRACT:
An ignition coil has an inorganic insulator material featuring a larger conductivity in the direction along the surface of the material than in the direction perpendicular to the surface of the material, between high-tension voltage components internal to a casing and conducting components internal and external to the casing. Localized discharge deterioration advancing from the high-tension components toward the conducting components is changed in its direction of advance to the direction along the surface of the inorganic insulator material, and is diffused accordingly. The resistance of the ignition coil against localized discharge deterioration is increased, and improved reliability in breakdown performance is resulted. This leads to a compact design.
The casing and bobbins are constructed of mica sheet as inorganic insulator material using insert molding technique, and productivity of the ignition coil is improved.

REFERENCES:
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patent: 3939449 (1976-02-01), Boyd et al.
patent: 4013987 (1977-03-01), Foster
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patent: 4400676 (1983-08-01), Mitsui
patent: 4560715 (1985-12-01), Ueeda et al.
patent: 4760296 (1988-06-01), Johnston et al.
patent: 5144935 (1992-09-01), Taruya et al.

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