Ignition coil unit and ignition system, capable of suppressing deformation of the seal section, used in internal combustion engine
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United States of America Patent
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Oct 27, 2020
Grant Date -
N/A
app pub date -
Jun 21, 2019
filing date -
Jun 26, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
An ignition coil unit is attached to an engine body. The engine body includes a cylinder head having a plug hole and a head cover that covers the cylinder head by including an opening hole facing the plug hole. The ignition coil unit includes a coil unit that generates a high voltage and a cylindrical coupling unit that connects the coil unit with a spark plug. The coupling unit includes a flexible sealing section fitting to an outer peripheral surface of the high tension tower and a harder joint fitting to a tip of the sealing section. The sealing section includes an adhesion portion to tightly contact the head cover and a neck portion at least between the adhesion portion and the joint in a Z-axis direction. The neck portion is formed by partially constricting an outer peripheral surface of the sealing section radially inside.
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