{
  "$type": "site.standard.document",
  "description": "Provided is a control device for an internal combustion engine capable of estimating a compression ratio of the internal combustion engine at the time of fuel cut of the internal combustion engine and without being affected by an intake air amount and an intake air temperature. A compression ratio…",
  "path": "/patents/1272654",
  "publishedAt": "2020-09-24T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D35/024",
    "Hitachi Automotive Systems, Ltd."
  ],
  "textContent": "Provided is a control device for an internal combustion engine capable of estimating a compression ratio of the internal combustion engine at the time of fuel cut of the internal combustion engine and without being affected by an intake air amount and an intake air temperature. A compression ratio ϵ is calculated on the basis of a change of in-cylinder pressure P with respect to crank angle θ at timing when an in-cylinder volume change rate dV/dθ/V takes an extreme value or at timing from closing of an intake valve to the start of ignition of the air-fuel mixture in the cylinder.",
  "title": "Control Device for Internal Combustion Engine"
}