{
  "$type": "site.standard.document",
  "description": "An internal combustion engine () includes: an exhaust gas recirculation unit equipped with an exhaust gas recirculation control valve (); a crank angle sensor () that detects an indicated mean effective pressure fluctuation rate (cPi) as an indicator of combustion stability of the internal…",
  "path": "/patents/1348151",
  "publishedAt": "2023-07-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D21/08",
    "NISSAN MOTOR CO., LTD."
  ],
  "textContent": "An internal combustion engine () includes: an exhaust gas recirculation unit equipped with an exhaust gas recirculation control valve (); a crank angle sensor () that detects an indicated mean effective pressure fluctuation rate (cPi) as an indicator of combustion stability of the internal combustion engine (); and a controller () that corrects the EGR rate of the exhaust gas recirculation unit based on the combustion stability. The controller () is configured to: increase-correct the EGR rate by a predetermined amount when the state where the indicated mean effective pressure fluctuation rate (cPi) is lower than a threshold value continues for a predetermined number of cycles; and decrease-correct the EGR rate by a predetermined amount immediately when the indicated mean effective pressure fluctuation rate (cPi) is higher than or equal to the threshold value.",
  "title": "CONTROL METHOD AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE"
}