{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreibwgbptlvn6ampodyjpbvnucgyhpr6yc3zjtqbtwi45tzkrjxg3na"
    },
    "mimeType": "image/png",
    "size": 84576
  },
  "description": "It effectively suppresses an unstable combustion of an engine at a time of start or end of catalyst regeneration. The exhaust purification system includes: an NOx reduction type catalyst (32) which is provided in an exhaust passage of an internal combustion engine; a intake air amount sensor (40)…",
  "path": "/patents/923832",
  "publishedAt": "2017-07-19T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N3/035",
    "ISUZU MOTORS LTD [JP]"
  ],
  "textContent": "It effectively suppresses an unstable combustion of an engine at a time of start or end of catalyst regeneration. The exhaust purification system includes: an NOx reduction type catalyst (32) which is provided in an exhaust passage of an internal combustion engine; a intake air amount sensor (40) which detects a intake air amount of the internal combustion engine; and a controller (50) which executes a regeneration treatment that switches an exhaust air fuel ratio from a lean state to a rich state by using an air-system control to reduce the intake air amount and an injection-system control to increase a fuel injection amount, which are used in combination. The controller (50) changes at least one of a fuel injection timing and the fuel injection amount in the internal combustion engine (10) in response to a detection value of the intake air amount sensor (40) in at least one period of switching of: a period of switching the lean state where the regeneration treatment is started to the rich state and a period of switching the rich state where the regeneration treatment is ended to the lean state.",
  "title": "EXHAUST PURIFICATION SYSTEM"
}