{
  "$type": "site.standard.document",
  "coverImage": {
    "$type": "blob",
    "ref": {
      "$link": "bafkreibi5c53jsmqmcz2rf5svq53ry3qc5jreayi6f2ddb56j2wtzbl6km"
    },
    "mimeType": "image/png",
    "size": 100831
  },
  "description": "To improve injection efficiency and stability of post injection required for regeneration of a nitrogen oxide occlusion catalyst. [0002] An average post-injection amount as a post-injection amount that is unambiguously determined for each cylinder on the basis of PID control, an-air fuel ratio…",
  "path": "/patents/929144",
  "publishedAt": "2017-03-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/0085",
    "BOSCH CORP [JP]"
  ],
  "textContent": "To improve injection efficiency and stability of post injection required for regeneration of a nitrogen oxide occlusion catalyst. [0002] An average post-injection amount as a post-injection amount that is unambiguously determined for each cylinder on the basis of PID control, an-air fuel ratio detected by a lambda sensor, and a target average air-fuel ratio as a target air-fuel ratio is computed (S100). Next, a post-injection deviation by cylinder that corresponds to an excess/shortage amount in a post-injection amount for each of the cylinders with respect to the average post-injection amount is computed on the basis of a characteristic deviation by cylinder that corresponds to a variation in the air-fuel ratio of each of the cylinders (S200 and S300). Post injection is performed by setting an addition result of the average post-injection amount and the post-injection deviation by cylinder as a post-injection amount by cylinder that is the post-injection amount required for each of the cylinders to realize the target average air-fuel ratio.",
  "title": "AIR-FUEL RATIO CONTROL METHOD AND EXHAUST GAS PURIFICATION DEVICE"
}