{
  "$type": "site.standard.document",
  "description": "In an engine device, when executing normal control that performs fuel injection and ignition as control of an engine, a controller estimates, in the case of a stoichiometric air-fuel ratio, an exhaust gas temperature based on first thermal energy that is based on a combustion gas temperature, a…",
  "path": "/patents/1306469",
  "publishedAt": "2021-12-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D43/04",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "In an engine device, when executing normal control that performs fuel injection and ignition as control of an engine, a controller estimates, in the case of a stoichiometric air-fuel ratio, an exhaust gas temperature based on first thermal energy that is based on a combustion gas temperature, a combustion gas quantity, and specific heat of combustion gas, estimates, in the case of a lean air-fuel ratio, the exhaust gas temperature based on the first thermal energy and second thermal energy that is based on an air temperature, a surplus air quantity, and specific heat of air, and estimates, in the case of a rich air-fuel ratio, the exhaust gas temperature based on the first thermal energy and third thermal energy that is based on a fuel temperature, a surplus fuel quantity, specific heat of fuel, and evaporation latent heat of fuel.",
  "title": "ENGINE DEVICE"
}