| 摘要 |
PROBLEM TO BE SOLVED: To provide an ignition coil for an internal combustion engine, in which the insulation of the secondary coil is improved. SOLUTION: A secondary spool 510 is molded with resin into a bottomed cylinder, and its ends are provided with flanges 510a and 510b, between which flanges 510d, 510e and 510f are provided toward the high-voltage side. The positions of the flanges 510d, 510e and 510f are set according to the potential distribution in a secondary coil 512. Specifically, the secondary voltage in the secondary coil 512 increases with the number of its turns; therefore, the flange 510d is positioned where the number of turns of the secondary coil is reached. The flanges 510e and 510f are positioned in the same way. |
