{
  "$type": "site.standard.document",
  "description": "The exhaust purification device of an internal combustion engine comprises a catalyst arranged in an exhaust passage and able to store oxygen; and an air-fuel ratio control device configured to control an air-fuel ratio of inflowing exhaust gas flowing into the catalyst. The air-fuel ratio control…",
  "path": "/patents/1306461",
  "publishedAt": "2021-12-16T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/0235",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "The exhaust purification device of an internal combustion engine comprises a catalyst arranged in an exhaust passage and able to store oxygen; and an air-fuel ratio control device configured to control an air-fuel ratio of inflowing exhaust gas flowing into the catalyst. The air-fuel ratio control device is configured to perform a distribution forming control controlling the air-fuel ratio of the inflowing exhaust gas so that in the catalyst, a first region with an oxygen storage amount of equal to or greater than a predetermined value and a second region with an oxygen storage amount of less than the predetermined value are alternately formed along an axial direction of the catalyst. The total number of the first region and the second region formed by the distribution forming control is equal to or greater than three.",
  "title": "EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE AND CATALYST"
}