IGNITION COIL FOR INTERNAL COMBUSTION ENGINE

• Main Author: KAWAI KAZUHIDE
• Format: Patent
• Language: English; Japanese
• Published: 11.04.2016
• 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 prolonging the life, by suppressing occurrence of peeling in the interface of a core cover and a filling resin or progress of peeling.SOLUTION: An ignition coil 1 includes a primary coil 21, a secondary coil 22, a center core 5, an outer peripheral core 6, a core cover 7, a case 11 and a filling resin 13. The core cover 7 is formed to cover the internal surface 61 in the peripheral core 6, one end face 62 in the penetration direction L, and the other end face 63 in the penetration direction L. A plurality of long grooves 76 are formed entirely in the internal surface, lateral surface, and one end face in the penetration direction L of a wall 75 formed at a part of the secondary coil 22 located on the high voltage side, of a one end side cover facing the one end face 62 in the penetration direction L, in the core cover 7. The plurality of long grooves 76 are filled with the filling resin 13 filling the case 11.SELECTED DRAWING: Figure 1 【課題】コアカバーと充填樹脂との界面における剥離の発生又は剥離の進展を抑制し、寿命を引き延ばすことができる内燃機関用点火コイルを提供する。【解決手段】点火コイル１は、一次コイル２１、二次コイル２２、中心コア５、外周コア６、コアカバー７、ケース１１及び充填樹脂１３を備えている。コアカバー７は、外周コア６における内側面６１、貫通方向Ｌの一端面６２、及び貫通方向Ｌの他端面６３を覆う形状に形成されている。コアカバー７における、外周コア６の貫通方向Ｌの一端面６２に対向する一端側カバー部であって、二次コイル２２の高圧側に位置する部位に形成された壁部７５の内側面、外側面、貫通方向Ｌの一端面の全てには、複数の長溝７６が形成されている。複数の長溝７６内は、ケース１１内を充填する充填樹脂１３によって充填されている。【選択図】図１