{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "An ignition system (31) includes a spark plug (1), a discharge power supply (32), and an AC power supply (33). The spark plug (1) includes an insulator (2) having an axial hole (4), an electrode (8) disposed in the axial hole (4) and having a tip end located frontward of a tip end of the insulator…",
  "path": "/patents/988726",
  "publishedAt": "2013-07-17T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02P3/00",
    "NGK SPARK PLUG CO [JP]"
  ],
  "textContent": "An ignition system (31) includes a spark plug (1), a discharge power supply (32), and an AC power supply (33). The spark plug (1) includes an insulator (2) having an axial hole (4), an electrode (8) disposed in the axial hole (4) and having a tip end located frontward of a tip end of the insulator (2), a metal shell (3) disposed on a periphery of the insulator (2), and a ground electrode (27) fixed to a tip end portion of the metal shell (3) and forming a spark discharge gap (28) between the tip end portion of the electrode (8) and the ground electrode (27). Voltage from the discharge power supply (32) and AC power from the AC power supply (33) are supplied to the spark discharge gap (28) through the electrode (8), and the AC power from the AC power supply (33) is applied to a spark generated by the voltage from the discharge power supply (32) in the spark discharge gap (28). Consequently, energy is efficiently applied to a spark without causing an increase in manufacturing cost, and ignitability can be dramatically improved.",
  "title": "IGNITION SYSTEM AND SPARK PLUG"
}