{
  "$type": "site.standard.document",
  "description": "Provided are a NOx sensor diagnosis apparatus capable of diagnosing the appropriateness of a NOx sensor by considering environmental conditions and preventing misdiagnosis, and an SCR system. A NOx sensor diagnose apparatus, which diagnoses a NOx sensor 110 provided in an exhaust pipe 102 of an…",
  "path": "/patents/985436",
  "publishedAt": "2013-03-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/00",
    "ISUZU MOTORS LTD [JP]"
  ],
  "textContent": "Provided are a NOx sensor diagnosis apparatus capable of diagnosing the appropriateness of a NOx sensor by considering environmental conditions and preventing misdiagnosis, and an SCR system. A NOx sensor diagnose apparatus, which diagnoses a NOx sensor 110 provided in an exhaust pipe 102 of an engine E and configured to detect the concentration of NOx in exhaust gas, includes a calculation value operating unit 2 configured to acquire the calculation value of the concentration of NOx in the exhaust gas based on the actuation state of the engine E, an error determining unit 3 configured to determine that the NOx sensor 110 is erroneous when a difference between the calculation value of the concentration of NOx acquired by the calculation value operating unit 2 and the detection value of the concentration of NOx detected by the NOx sensor 110 is larger than a determination threshold value, and a determination threshold value setting unit 4 configured to set the determination threshold value based on the temperature of the cooling water for cooling the engine E, an atmospheric pressure, and an outdoor temperature.",
  "title": "NOX SENSOR DIAGNOSING DEVICE AND SCR SYSTEM"
}