{
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  "description": "The internal combustion engine comprises an exhaust purification catalyst (20) able to store oxygen, and a downstream side air-fuel ratio sensor (41) arranged at a downstream side of the catalyst The system performs feedback control of an amount of fuel fed to a combustion chamber so that an…",
  "path": "/patents/922360",
  "publishedAt": "2017-08-23T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/007",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "The internal combustion engine comprises an exhaust purification catalyst (20) able to store oxygen, and a downstream side air-fuel ratio sensor (41) arranged at a downstream side of the catalyst The system performs feedback control of an amount of fuel fed to a combustion chamber so that an air-fuel ratio of exhaust gas flowing into the catalyst becomes a target air-fuel ratio and performs learning control to correct a parameter relating to the feedback control based on an air-fuel ratio of exhaust gas detected by the sensor. The target air-fuel ratio is alternately switched between a rich set air-fuel ratio and a lean set air-fuel ratio. When a condition for learning acceleration is satisfied, a rich degree of the rich set air-fuel ratio is increased. It is provided an engine able to suitably change the speed of updating the learning value.",
  "title": "INTERNAL COMBUSTION ENGINE CONTROLLER"
}