{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "This misfire detecting device for an internal combustion engine having a plurality of cylinders, for detecting a misfire of the internal combustion engine, is provided with: a pulsation component acquiring unit for performing a frequency analysis of operating parameter data indicating a change over…",
  "path": "/patents/1394190",
  "publishedAt": "2025-08-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B77/086",
    "MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD [JP]"
  ],
  "textContent": "This misfire detecting device for an internal combustion engine having a plurality of cylinders, for detecting a misfire of the internal combustion engine, is provided with: a pulsation component acquiring unit for performing a frequency analysis of operating parameter data indicating a change over time in an operating parameter correlated with an overall operating state of the plurality of cylinders, and for acquiring a pulsation component spectrum, which is a frequency spectrum of pulsations of the internal combustion engine; a difference parameter acquiring unit for acquiring a difference parameter correlated with a degree of difference between the operations of each of the plurality of cylinders; and all-cylinder misfire determining unit for determining that an all-cylinder misfire has occurred in the internal combustion engine if the pulsation component spectrum acquired by the pulsation component acquiring unit falls below a first threshold and the difference parameter acquired by the difference parameter acquiring unit 12 falls below a second threshold.",
  "title": "INTERNAL COMBUSTION ENGINE MISFIRE DETECTING DEVICE AND MISFIRE DETECTING METHOD"
}