{
  "$type": "site.standard.document",
  "description": "The abnormality diagnosis system of a downstream side air-fuel ratio detection device , comprises an air-fuel ratio control part controlling an air-fuel ratio of an air-fuel mixture, an abnormality judgment part judging abnormality of the downstream side air-fuel ratio detection device based on a…",
  "path": "/patents/1296336",
  "publishedAt": "2021-07-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/1495",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "The abnormality diagnosis system of a downstream side air-fuel ratio detection device , comprises an air-fuel ratio control part controlling an air-fuel ratio of an air-fuel mixture, an abnormality judgment part judging abnormality of the downstream side air-fuel ratio detection device based on a characteristic of change of output of the downstream side air-fuel ratio detection device when the air-fuel ratio control part makes the air-fuel ratio of the air-fuel mixture change, and an oxygen change calculation part calculating an amount of change of an oxygen storage amount of the catalyst when the air-fuel ratio control part makes the air-fuel ratio of the air-fuel mixture change. The abnormality judgment part does not judge abnormality of the downstream side air-fuel ratio detection device when the amount of change of the oxygen storage amount is less than a lower limit threshold value.",
  "title": "ABNORMALITY DIAGNOSIS SYSTEM OF DOWNSTREAM SIDE AIR-FUEL RATIO DETECTION DEVICE"
}