{
  "$type": "site.standard.document",
  "description": "The catalyst deterioration detection system comprises an air-fuel ratio detection device detecting an air-fuel ratio of an exhaust gas flowing out from the catalyst , an air-fuel ratio control part , and a deterioration judgment part . The air-fuel ratio control part is configured to perform a lean…",
  "path": "/patents/1294361",
  "publishedAt": "2021-07-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/007",
    "TOYOTA JIDOSHA KABUSHIKI KAISHA"
  ],
  "textContent": "The catalyst deterioration detection system comprises an air-fuel ratio detection device detecting an air-fuel ratio of an exhaust gas flowing out from the catalyst , an air-fuel ratio control part , and a deterioration judgment part . The air-fuel ratio control part is configured to perform a lean control making the air-fuel ratio of the inflowing exhaust gas leaner than a stoichiometric air-fuel ratio and a rich control making the air-fuel ratio of the inflowing exhaust gas richer than the stoichiometric air-fuel ratio. The deterioration judgment part is configured to calculate an amplitude of an air-fuel ratio of an exhaust gas flowing out from the catalyst due to the lean control and the rich control based on an output of the air-fuel ratio detection device and judge that the catalyst is deteriorating if the amplitude is equal to or greater than a threshold value.",
  "title": "CATALYST DETERIORATION DETECTION SYSTEM"
}