{
  "$type": "site.standard.document",
  "description": "An abnormality diagnosis system which can reliably detect a crack of element of an air-fuel ratio sensor. An abnormality diagnosis system of limit current type air-fuel ratio sensors (40, 41) provided in the exhaust passage of the internal combustion engine comprises a current detecting part (61)…",
  "path": "/patents/942722",
  "publishedAt": "2016-05-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/1441",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "An abnormality diagnosis system which can reliably detect a crack of element of an air-fuel ratio sensor. An abnormality diagnosis system of limit current type air-fuel ratio sensors (40, 41) provided in the exhaust passage of the internal combustion engine comprises a current detecting part (61) detecting an output current of an air-fuel ratio sensor and a sensor temperature control device controlling the temperature of the air-fuel ratio sensor. The abnormality diagnosis system uses the current detecting part (61) to detect the output current of the air-fuel ratio sensor when the air-fuel ratio is made the rich air-fuel ratio in the state where temperature of the air-fuel ratio is made the first temperature and when the air-fuel ratio is made the rich air-fuel ratio in the state where the temperature of the air-fuel ratio is made a second temperature higher than the first temperature. It is judged that the air-fuel ratio sensor is abnormal if the output current when the temperature of the air-fuel ratio sensor is the first temperature is larger than the output current when it is the second temperature by a predetermined value or more.",
  "title": "ABNORMALITY DIAGNOSIS SYSTEM OF AIR-FUEL RATIO SENSOR"
}