{
  "$type": "site.standard.document",
  "description": "An apparatus (41) for detecting deterioration of a catalyst (21) in an internal combustion engine (10) initially biases an air/fuel ratio of an air-fuel mixture supplied to the internal combustion engine (10) to a rich amount so that an amount of oxygen stored in the catalyst (21) is substantially…",
  "path": "/patents/1076613",
  "publishedAt": "2005-06-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/0295",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "An apparatus (41) for detecting deterioration of a catalyst (21) in an internal combustion engine (10) initially biases an air/fuel ratio of an air-fuel mixture supplied to the internal combustion engine (10) to a rich amount so that an amount of oxygen stored in the catalyst (21) is substantially zero, Then, the apparatus (41) detects deterioration of the catalyst (21) by alternating the air/fuel ratio lean or rich based on an amount of oxygen given to the catalyst (21). If the catalyst (21) has deteriorated, a bias amount of the air/fuel ratio is set so that the amount of oxygen stored in the catalyst (21) is substantially saturated. If the catalyst (21) is normal, a bias amount of the air/fuel ratio is set so that the amount of oxygen stored in the catalyst (21) is not saturated.",
  "title": "System for and method of detecting deterioration of catalyst in internal combustion engine"
}