{
  "$type": "site.standard.document",
  "description": "To provide a spark plug that can reduce power loss and prevent erosion of a tip end part of a central electrode, even in a configuration such that a discharge current and an electromagnetic wave are emitted from a terminal fitting part of the spark plug, and a plasma generation device using the…",
  "path": "/patents/942114",
  "publishedAt": "2016-06-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02P3/01",
    "IMAGINEERING INC [JP]"
  ],
  "textContent": "To provide a spark plug that can reduce power loss and prevent erosion of a tip end part of a central electrode, even in a configuration such that a discharge current and an electromagnetic wave are emitted from a terminal fitting part of the spark plug, and a plasma generation device using the spark plug. The spark plug is provided with a central electrode 2 including a terminal fitting part 2A and an electrode main body 2B electrically connected to the terminal fitting part 2A, an insulator 3 formed with an axial hole 30, which the central electrode 2 is fitted into, a main fitting 4 that surrounds the insulator 3, and a ground electrode 5 that extends from an end surface of the main fitting 4 and is adapted to form a discharge gap that causes a spark discharge between the central electrode 2 and the electrode main body 2B. The electrode main body 2B is constituted of a front electrode 25 including an electrode tip part 25a for causing the spark discharge with the ground electrode 5, a front dielectric cylinder 24 in a tube-like shape that covers the electrode tip part 25a, and a coupling conductive cylinder 23 in a tube-like shape that joins the front dielectric cylinder 24 and the terminal fitting part 2A.",
  "title": "SPARK PLUG AND PLASMA GENERATING DEVICE"
}