{
  "$type": "site.standard.document",
  "description": "A method for reducing emissions from a hydrogen combustion engine includes: a first step in which a controller obtains an HO concentration at a front end of an SCR catalyst, an SCR temperature, and a NO/NOx ratio derived from a DOC; a second step in which the controller calculates a predicted NOx…",
  "path": "/patents/1374383",
  "publishedAt": "2026-06-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01N3/206",
    "HYUNDAI MOTOR COMPANY"
  ],
  "textContent": "A method for reducing emissions from a hydrogen combustion engine includes: a first step in which a controller obtains an HO concentration at a front end of an SCR catalyst, an SCR temperature, and a NO/NOx ratio derived from a DOC; a second step in which the controller calculates a predicted NOx purification rate based on the HO concentration, the SCR temperature, and the NO/NOx ratio; and a third step in which the controller calculates a urea dosing amount that aligns with the predicted NOx purification rate and performs control to dose the calculated dosing amount of urea.",
  "title": "Method for reducing emissions from a hydrogen combustion engine"
}