IGNITION COIL FOR INTERNAL COMBUSTION ENGINE

• Main Author: KAWAI KAZUHIDE
• Format: Patent
• Language: English; Japanese
• Published: 23.03.2017
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; COMBUSTION ENGINES; ELECTRICITY; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; INDUCTANCES; LIGHTING; MAGNETS; MECHANICAL ENGINEERING; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; TRANSFORMERS; WEAPONS

PROBLEM TO BE SOLVED: To provide an ignition coil for internal combustion engine capable of suppressing high frequency noise leakage to the outside.SOLUTION: An ignition coil 1 for internal combustion engine has a primary coil 21 and a secondary coil 22 coupled magnetically each other, a center core 3, an outer peripheral core 4, a sealing resin 5, a connector 6, a conductive path 7 and a high frequency noise suppression part 71. The center core 3 is placed on the inside of the primary coil 21 and secondary coil 22. The outer peripheral core 4 are placed on the outside of the primary coil 21 and secondary coil 22. The sealing resin 5 seals the primary coil 21, secondary coil 22, center core 3 and outer peripheral core 4. The connector 6 is connected with an external apparatus. The conductive path 7 electrically connects the outer peripheral core 4 and connector 6. The high frequency noise suppression part 71 is placed in the conductive path 7, and suppresses propagation of high frequency noise from the outer peripheral core 4 to the connector 6.SELECTED DRAWING: Figure 1 【課題】外部への高周波ノイズの流出を抑制することができる内燃機関用の点火コイルを提供すること。【解決手段】内燃機関用の点火コイル１は、互いに磁気的に結合された一次コイル２１及び二次コイル２２と、中心コア３と外周コア４と封止樹脂５とコネクタ部６と導電経路７と高周波ノイズ抑制部７１とを有する。中心コア３は、一次コイル２１及び二次コイル２２の内側に配置されている。外周コア４は、一次コイル２１及び二次コイル２２の外側に配置されている。封止樹脂５は、一次コイル２１、二次コイル２２、中心コア３、及び外周コア４を封止している。コネクタ部６は、外部機器に接続される。導電経路７は、外周コア４とコネクタ部６とを電気的に接続する。高周波ノイズ抑制部７１は、導電経路７に配され、外周コア４からコネクタ部６へ高周波ノイズが伝播することを抑制する。【選択図】図１