{
  "$type": "site.standard.document",
  "description": "In a failure diagnosis device of an emission control system that utilizes an electrode-based PM sensor (54) provided downstream of a particulate filter (51) in an exhaust conduit to diagnose a failure of the particulate filter, an object of the invention is to suppress reduction of accuracy of…",
  "path": "/patents/937460",
  "publishedAt": "2016-09-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N11/00",
    "TOYOTA MOTOR CO LTD [JP]"
  ],
  "textContent": "In a failure diagnosis device of an emission control system that utilizes an electrode-based PM sensor (54) provided downstream of a particulate filter (51) in an exhaust conduit to diagnose a failure of the particulate filter, an object of the invention is to suppress reduction of accuracy of diagnosis of a failure due to in-cylinder rich control. The failure diagnosis device of the emission control system starts application of a predetermined voltage to electrodes of the electrode-based PM sensor (54) after a sensor recovery process that removes PM depositing between the electrodes of the PM sensor, and diagnoses a failure of the particulate filter based on an output of the PM sensor measured after elapse of a predetermined time period (ts) since the start of application of the predetermined voltage. The failure diagnosis device performs the sensor recovery process during in-cylinder rich control or triggered by termination of the in-cylinder rich control and subsequently performs a measurement process after termination of the in-cylinder rich control and the sensor recovery process.",
  "title": "FAILURE DIAGNOSIS DEVICE OF EMISSION CONTROL SYSTEM"
}