{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A reciprocating internal combustion engine (10) includes an in-cylinder pressure sensor (34) and a crank angle sensor (42). Data of calculated heat release amount Q in synchronization with crank angle is calculated using in-cylinder pressure P after absolute pressure correction. An amount of heat…",
  "path": "/patents/934887",
  "publishedAt": "2016-11-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B77/085",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "A reciprocating internal combustion engine (10) includes an in-cylinder pressure sensor (34) and a crank angle sensor (42). Data of calculated heat release amount Q in synchronization with crank angle is calculated using in-cylinder pressure P after absolute pressure correction. An amount of heat release amount variation Q is calculated as a difference between a first calculated heat release amount Q 1 at a first crank angle ¸ 1 on an advanced side of TDC and a second calculated heat release amount Q 1 at a second crank angle ¸ 2 symmetrical to ¸ 1 about TDC. An actual heat release amount Qt is estimated based on the amount of heat release amount variation Q calculated using, as the first crank angle ¸ 1 , a crank angle on an advanced side of a combustion start point and using, as the second crank angle ¸ 2 , a crank angle on a retarded side of a combustion end point.",
  "title": "COMBUSTION STATUS DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE"
}