Ignition coil for internal combustion engine
AssigneeDenso Corporation
InventorYoshitaka SATO
Life of this patent
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Abstract
An ignition coil for an internal combustion engine includes a primary coil, a secondary coil, a case, and a joint. The primary and secondary coils are magnetically coupled with each other. The case includes a case body in which the primary and secondary coils are disposed and a cylindrical high-voltage tower which protrudes from a case bottom wall of the case body. The joint is fit on the high-voltage tower and a spark plug. The joint is of a cylindrical shape. A communicating void is formed between the high-voltage tower and the joint to communicate between an inner space of the high-voltage tower and the joint and an outer space disposed outside the high-voltage tower and the joint, thereby facilitating attachment or removal of the joint to or from the spark plug.
Claims17
An ignition coil for an internal combustion engine comprising:
- a primary coil and a secondary coil which are magnetically coupled with each other;
- a case which includes a case body in which the primary coil and the secondary coil are disposed and a cylindrical high-voltage tower which protrudes from a bottom wall of the case body;
- and
- a cylindrical joint which is fit on the high-voltage tower and a spark plug,
- wherein a communicating void is formed between the high-voltage tower and the joint to communicate between an inner space formed inside the high-voltage tower and the joint and an outer space located outside the high-voltage tower and the joint.
Dependencies are inferred from the claim text.