JPH0163781U

JPH0163781U -

Info

Publication number: JPH0163781U
Application number: JP1987158322U
Authority: JP
Priority date: 1987-10-16
Filing date: 1987-10-16
Publication date: 1989-04-24

Description

[Brief explanation of the drawing]

第１図は点火プラグを結合させた本考案に係る
点火コイルの正面部分断面図、第２図は同じく別
の実施例における正面部分断面図、第３図は従来
の点火コイルの使用状態における正面部分断面図
、第４図は同じくその側面断面図、第５図は点火
コイルの駆動回路図、第６図は第５図の駆動回路
によつて得られる高圧パルスの波形図、第７図は
従来の点火コイルの動作を説明するＢ―Ｈヒステ
リシス曲線図、第８図は本考案に係る点火コイル
の動作を説明するＢ―Ｈヒステリシス曲線図であ
る。１，２……コア、３……低圧入力コイル、４…
…高圧出力コイル、１１……永久磁石。 Fig. 1 is a front partial sectional view of an ignition coil according to the present invention combined with a spark plug, Fig. 2 is a front partial sectional view of another embodiment, and Fig. 3 is a front view of a conventional ignition coil in use. 4 is a side sectional view of the same, FIG. 5 is a drive circuit diagram of the ignition coil, FIG. 6 is a waveform diagram of the high voltage pulse obtained by the drive circuit of FIG. 5, and FIG. FIG. 8 is a B-H hysteresis curve diagram illustrating the operation of the conventional ignition coil. FIG. 8 is a B-H hysteresis curve diagram illustrating the operation of the ignition coil according to the present invention. 1, 2...Core, 3...Low voltage input coil, 4...
...High voltage output coil, 11...Permanent magnet.

Claims

[Scope of utility model registration request]

The ignition coil includes a magnetic circuit including a low-voltage input coil, a high-voltage output coil, and a core that magnetically couples the two coils, and supplies high voltage from the high-voltage output coil to the spark plug. An ignition coil characterized in that a part of the core is provided with a permanent magnet that generates magnetic flux in a direction opposite to the direction of the generated magnetic flux.