Ignition coil having a toroidal magnet

Details Ignition coil having a toroidal magnet Ignition coil having a toroidal magnet

1998-08-03

2000-02-22

Gellner, Michael L.

Inductor devices

With permanent magnet

336107, 336 96, 123634, H01F 2100, H01F 2702, F02P 1100

Patent

active

06028501&

ABSTRACT:
An ignition coil, particularly for use in connection with an internal combustion engine, wherein a toroidal permanent magnet is located at one end thereof between the magnetic core and the outer cylinder. This magnet provides a reverse bias magnetic field which interacts with the field generated by the primary coil to produce a composite magnetic field which increases the efficiency of the ignition coil. The reverse bias magnetic field acts in the opposite direction from the magnetic field generated by the primary coil. In another embodiment of the coil, a support is provided in which the toroidal magnet is placed. The support may have an open top or open sides. In the former case, the complete magnet is pressed into the support and retained by gripping portions. In the latter case, the magnet is composed of at least two members, each of which is pressed into the magnet holding chamber formed by the support. Gripping portions retain the members in position.

REFERENCES:
patent: 4004560 (1977-01-01), Brungsberg
patent: 4459967 (1984-07-01), Hayashi
patent: 4990881 (1991-02-01), Ooyabu
patent: 5101803 (1992-04-01), Nakamura et al.
patent: 5146906 (1992-09-01), Agatsuma

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