Title:
内燃機関用点火コイルおよび内燃機関用点火コイルの製造方法
Document Type and Number:
Japanese Patent JP6613166
Kind Code:
B2
Abstract:
An internal combustion engine ignition coil according to the present invention includes: a central iron core 6; a primary coil 3 disposed on an outer circumference of the central iron core; a secondary coil 5 disposed on an outer circumference of the primary coil; a side iron core disposed on an outer circumference of the secondary coil; and an insulating material sealing the central iron core 6, the primary coil 3, and the secondary coil 5 on an inner side of the side iron core. A first layered silicate having a particle diameter less than a winding diameter of the secondary coil is present at a higher concentration in a vicinity of the secondary coil than that in a vicinity of the side iron core in the insulating material. A second layered silicate having a particle diameter greater than the winding diameter of the secondary coil 5 is present at a higher concentration than that of the first layered silicate between the outer circumference side of the secondary coil 5 and the side iron core. The second layered silicate has an aspect ratio of 50 or more, the aspect ratio being a ratio of a long side of a particle of the layered silicate to a thickness of the particle.
Inventors:
Kamikawa Masayuki
Dew field yen length
Toshiaki Ishii
Yoichi Azusa
Dew field yen length
Toshiaki Ishii
Yoichi Azusa
Application Number:
JP2016029707A
Publication Date:
November 27, 2019
Filing Date:
February 19, 2016
Export Citation:
Assignee:
Hitachi Automotive Systems Hanshin Co., Ltd.
International Classes:
H01F38/12; C08K3/22; C08K3/34; C08K5/1539; C08K5/17; C08K5/20; C08L63/00; F02P15/00; H01F41/02; H01F41/12
Domestic Patent References:
| JP7230931A | ||||
| JP2017092358A | ||||
| JP2015074710A |
Attorney, Agent or Firm:
Polaire Patent Business Corporation