{
  "$type": "site.standard.document",
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  "description": "The deterioration judgment for an absorption reduction type NOx catalyst (4) is performed quickly and correctly. A catalyst deterioration judging system comprises a judging unit (10) which judges that the absorption reduction type NOx catalyst (4) is deteriorated if a detected value of an NH 3…",
  "path": "/patents/979989",
  "publishedAt": "2014-01-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/00",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "The deterioration judgment for an absorption reduction type NOx catalyst (4) is performed quickly and correctly. A catalyst deterioration judging system comprises a judging unit (10) which judges that the absorption reduction type NOx catalyst (4) is deteriorated if a detected value of an NH 3 detecting unit (8) is not more than a threshold value within a predetermined time immediately after starting supply of a reducing agent from a supply unit (5) while regulating an amount of the reducing agent so that the air-fuel ratio of an exhaust gas is a rich air-fuel ratio by means of a control unit (10) when NOx is absorbed by the absorption reduction type NOx catalyst (4).",
  "title": "CATALYST DETERIORATION DETERMINING SYSTEM"
}