Ignition coil for internal combustion engine

Details Ignition coil for internal combustion engine Ignition coil for internal combustion engine

1992-12-02

1994-11-01

Kozma, Thomas J.

Inductor devices

With supporting and/or spacing means between coil and core

Preformed insulation between coil and core

336206, H01F 2730

Patent

active

053610571

ABSTRACT:
An ignition coil for an internal combustion engine has a corrodable metallic core (9, 10) about which is provided a circumferential primary coil former (1) upon which is wound a primary coil (2). Circumferentially disposed around the primary coil is a secondary coil (3) located on a former (13). So as to prevent the corrodable metallic core ( 9, 10 ) from fracturing the primary coil former, there is disposed an absorbing layer (12) between the core and the primary coil. The stress absorbing layer may be provided between the primary coil and the primary former or the primary former may comprise a deformable inner cylindrical member (1b) and a substantially rigid outer cylindrical member (1a) with the stress absorbing material (12) located in the annular space between the inner cylindrical member and the outer cylindrical member. The stress absorbing material in such an alternative embodiment may be formed of foamed rubber-like material or may be an air gap. In yet another embodiment the former about which the primary coil (2) is wound may be formed of a stress absorbing material.

REFERENCES:
patent: 2942217 (1960-06-01), Ford
patent: 3018455 (1962-01-01), Brandon, Jr. et al.
patent: 3533037 (1970-10-01), Koch
patent: 4325096 (1982-04-01), Sunohara et al.
patent: 4494102 (1985-01-01), Fisher et al.
patent: 4912447 (1990-03-01), Paul

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