{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "In a limited-current type gas sensor which detects oxygen-containing gas contained in an exhaust gas of an internal combustion engine, the decomposition current value of water (H 2 O) is detected, and the existence of an abnormality of output characteristics of the limited-current type gas sensor…",
  "path": "/patents/936762",
  "publishedAt": "2016-10-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/00",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "In a limited-current type gas sensor which detects oxygen-containing gas contained in an exhaust gas of an internal combustion engine, the decomposition current value of water (H 2 O) is detected, and the existence of an abnormality of output characteristics of the limited-current type gas sensor is diagnosed based on its deviation from a reference decomposition current value of water corresponding to the concentration of water contained in the exhaust gas. Thereby, not only an oxygen sensor (air-fuel-ratio sensor), but also a NOx sensor and a SOx sensor can accurately and easily diagnose not only a remarkable abnormality of output characteristics, but also a minute abnormality thereof. In addition, the reference decomposition current value of water may be acquired based on the concentration of water detected by a separate humidity sensor or the decomposition current value of oxygen detected by the limited-current type gas sensor. In the latter case, the reference decomposition current value of water may be corrected based on a decomposition current value of oxygen detected during a fuel cut.",
  "title": "AN ABNORMALITY DIAGNOSIS OF A GAS SENSOR"
}