초록 ▼

A terminal portion (11) of a spark plug (10) and a connecting terminal (22) of an ignition coil (20) are connected through a coil spring (30) serving as a conductive member which in turn is covered with an insulating member (40) having a cap (41), a sleeve (47) and a bushing (48) and extending from

A terminal portion (11) of a spark plug (10) and a connecting terminal (22) of an ignition coil (20) are connected through a coil spring (30) serving as a conductive member which in turn is covered with an insulating member (40) having a cap (41), a sleeve (47) and a bushing (48) and extending from the terminal portion (11) to a high-tension tower (21). A first air vent hole (44) is defined by an upper surface of a collar portion (42) of the cap (41) and a bottom surface of an ignition coil body (23) in intimate contact with the upper surface, and a plurality of reservoir spaces (45) having a greater volume than the first air vent hole (44) are formed in circumferentially spaced apart relation along the first air vent hole (44). A second air vent hole (46) is formed in the cap (41) for communication between the first air vent hole (44) and the interior of a plug hole (H). This provides a structure for connecting the spark plug and the ignition coil which prevents water from entering the plug hole through the air vent holes when a cylinder head is subjected to high-pressure water.

대표청구항 ▼

A structure for connecting a spark plug and an ignition coil for an internal combustion engine, comprising: a spark plug mounted in the bottom of a plug hole formed in a cylinder head; an ignition coil including a bar-shaped coil body portion received in said plug hole, a plug connecting portion at

A structure for connecting a spark plug and an ignition coil for an internal combustion engine, comprising: a spark plug mounted in the bottom of a plug hole formed in a cylinder head; an ignition coil including a bar-shaped coil body portion received in said plug hole, a plug connecting portion at the lower end of said coil body portion and connected to said spark plug, and a lid portion at the upper end of said coil body portion and located exteriorly of said plug hole; and an annular rubber member provided between said lid portion of said ignition coil and said cylinder head and in intimate contact with a bottom surface of said lid portion and a periphery of an upper opening of said plug hole, there being a first air vent passage between said annular rubber member and said lid portion and in communication with the exterior, said annular rubber member having a second air vent passage for communication between said first air vent passage and the interior of said plug hole, there being a large-volume reservoir space between said annular rubber member and said lid portion at a position along said first air vent passage and having a cross-sectional area enlarged from said first air vent passage.