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1. (WO2017179118) INTERNAL COMBUSTION ENGINE IGNITION DEVICE

Pub. No.:    WO/2017/179118    International Application No.:    PCT/JP2016/061772
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Wed Apr 13 01:59:59 CEST 2016
IPC: H01F 38/12
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: YANAGI Shota
▲柳▼ 翔太
IDOGAWA Takashi
井戸川 貴志
Title: INTERNAL COMBUSTION ENGINE IGNITION DEVICE
Abstract:
An internal combustion engine ignition device (1) comprises: a center core (2); a primary coil (7) wound on the outside of the center core (2); a secondary coil (9) wound on the outside of the primary coil (7); a permanent magnet (13) which abuts against one end of the center core (2) and is magnetized in the inverse direction to the direction of a magnetic flux produced by the energization of the primary coil (7); a side core (3) which is disposed on the outside of the secondary coil (9) with one end abutted against the permanent magnet (13) and the other end abutted against the center core (2), the side core (3) cooperating with the permanent magnet (13) to form a closed magnetic path; and a heat-resistant and elastic resin (4) covering the side core (3) with an opening at an outer peripheral side portion (3s) thereof. Heat dissipation from the side core (3) to a housing (10) is improved and a reduction in device size is achieved without adversely affecting the dielectric strength voltage of the secondary coil (9).