{
  "url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-1/division-1.4",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-1/division-1.4.json",
  "legislation": "eur/2017/654",
  "legislation_title": "Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-654",
  "path": "annex/VII/division/1/division/1.4",
  "kind": "division",
  "number": "1.4",
  "heading": "Symbols and abbreviations for the fuel composition",
  "text": "Referred to a fuel with chemical formula CHαOεNδSγ.\nReferred to a fuel with chemical formula CHαOβSγNδ.\nAttention should be paid to the different meaning of symbol β in the two emissions calculation sections: in section 2 it refers to a fuel having the chemical formula CHαSγNδOε (i.e. the formula CβHαSγNδOε where β = 1, assuming one carbon atom per molecule), while in section 3 it refers to the oxygen-to-carbon ratio with CHαOβSγNδ. Then β of section 3 corresponds to ε of section 2.\nMass fraction w accompanied by the symbol of the chemical component as a subscript.\nSection 2\nSection 3\nQuantity\nw C\nw C\nCarbon content of fuel, mass fraction [g/g] or [% mass]\nw H\nw H\nHydrogen content of fuel, mass fraction [g/g] or [% mass]\nw N\nw N\nNitrogen content of fuel, mass fraction [g/g] or [% mass]\nw O\nw O\nOxygen content of fuel, mass fraction [g/g] or [% mass]\nw S\nw S\nSulphur content of fuel, mass fraction [g/g] or [% mass]\nα\nα\nAtomic hydrogen-to-carbon ratio (H/C)\nε\nβ\nAtomic oxygen-to-carbon ratio (O/C)\nγ\nγ\nAtomic sulphur-to-carbon ratio (S/C)\nδ\nδ\nAtomic nitrogen-to-carbon ratio (N/C)",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Referred to a fuel with chemical formula CHαOεNδSγ."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "Referred to a fuel with chemical formula CHαOβSγNδ."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "Mass fraction w accompanied by the symbol of the chemical component as a subscript."
    },
    {
      "type": "footnote",
      "label": "f4",
      "text": "Attention should be paid to the different meaning of symbol β in the two emissions calculation sections: in section 2 it refers to a fuel having the chemical formula CHαSγNδOε (i.e. the formula CβHαSγNδOε where β = 1, assuming one carbon atom per molecule), while in section 3 it refers to the oxygen-to-carbon ratio with CHαOβSγNδ. Then β of section 3 corresponds to ε of section 2."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/1/division/1.4",
    "retrieved_at": "2026-11-01T14:45:01.864924+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}