{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "An EGR estimation method for an internal combustion engine estimates an EGR rate in an intake and exhaust system , of an internal combustion engine, the intake and exhaust system , of an internal combustion engine including an intake system , an exhaust system , and an EGR device , the EGR device…",
  "path": "/patents/1343683",
  "publishedAt": "2023-05-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/0072",
    "NISSAN MOTOR CO., LTD."
  ],
  "textContent": "An EGR estimation method for an internal combustion engine estimates an EGR rate in an intake and exhaust system , of an internal combustion engine, the intake and exhaust system , of an internal combustion engine including an intake system , an exhaust system , and an EGR device , the EGR device includes an EGR passage and an EGR valve . The EGR estimation method includes determining a gas replacement state by exhaust gas and fresh air in an upstream EGR passage, which is a portion of the EGR passage between the EGR valve and the exhaust passage, when fuel cut of the internal combustion engine is started and the EGR valve is fully closed; and estimating the EGR rate based on a result of the determination.",
  "title": "EGR ESTIMATION METHOD FOR INTERNAL COMBUSTION ENGINE AND EGR ESTIMATION DEVICE FOR INTERNAL COMBUSTION ENGINE"
}