{
  "$type": "site.standard.document",
  "description": "In an exhaust path (4) of an internal combustion engine (2), a catalyst (6) including an oxygen storage capacity, a first air-fuel ratio sensor (10) installed upstream of the catalyst (6), and a second air-fuel ratio sensor (12) installed downward of the catalyst are disposed. An air-fuel ratio of…",
  "path": "/patents/958942",
  "publishedAt": "2015-07-29T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/007",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "In an exhaust path (4) of an internal combustion engine (2), a catalyst (6) including an oxygen storage capacity, a first air-fuel ratio sensor (10) installed upstream of the catalyst (6), and a second air-fuel ratio sensor (12) installed downward of the catalyst are disposed. An air-fuel ratio of the internal combustion engine (2) is controlled to a rich air-fuel ratio richer than a theoretical air-fuel ratio, or a lean air-fuel ratio leaner than the theoretical air-fuel ratio. In a state that is determined as a state where the catalyst (6) stores oxygen to an upper limit of an oxygen storage amount after the air-fuel ratio is switched to the lean air-fuel ratio from the rich air-fuel ratio, or a state where the catalyst (6) releases oxygen to a lower limit of the oxygen storage amount after the air-fuel ratio is switched to the rich air-fuel ratio from the lean air-fuel ratio, a first output that is the output of the first air-fuel ratio sensor (10), and a second output that is the output of the second air-fuel ratio sensor (12) are detected. Based on a difference between the first output and the second output, the output of the first air-fuel ratio sensor (10) is corrected.",
  "title": "CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE"
}