{
  "$type": "site.standard.document",
  "description": "A method includes calculating a first fuel evaporation gas density in a purge pump of a vehicle based on a pressure difference between a front end and a rear end of the purge pump, a radius of a fluid passage of the purge pump, a number of rotations of the purge pump, and an opening amount of a…",
  "path": "/patents/1356578",
  "publishedAt": "2023-12-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01N33/225",
    "Hyundai Motor Company"
  ],
  "textContent": "A method includes calculating a first fuel evaporation gas density in a purge pump of a vehicle based on a pressure difference between a front end and a rear end of the purge pump, a radius of a fluid passage of the purge pump, a number of rotations of the purge pump, and an opening amount of a purge control solenoid valve, filtering the first fuel evaporation gas density, calculating a second fuel evaporation gas density in the purge pump based on the filtered first fuel evaporation gas density, calculating a third fuel evaporation gas density in a standard temperature and pressure state based on the second fuel evaporation gas density, a current pressure in the purge pump, and a current temperature in the purge pump, and calculating a concentration of hydrocarbon in a fuel evaporation gas in the purge pump based on the third fuel evaporation gas density.",
  "title": "METHOD AND DEVICE FOR CALCULATING CONCENTRATION OF HYDROCARBON IN FUEL EVAPORATION GAS OF VEHICLE"
}