{
  "url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/7/division/division-3./division-3.1.",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/7/division/division-3./division-3.1..json",
  "legislation": "eur/2017/1151",
  "legislation_title": "Commission Regulation (EU) 2017/1151 of 1 June 2017 supplementing Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information, amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) No 1230/2012 and repealing Commission Regulation (EC) No 692/2008 (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-1151",
  "path": "annex/Sub/7/division/division/3./division/3.1.",
  "kind": "division",
  "number": "3.1",
  "heading": "General requirements",
  "text": "Carbon monoxide (CO)ρ=1,25g/l\nCarbon dioxide (CO2)ρ=1,964g/l\nHydrocarbons:\nfor petrol (E10) (C1H1,93 O0,033)ρ=0,646g/l\nfor diesel (B7) (C1H1,86O0,007)ρ=0,625g/l\nfor LPG (C1H2,525)ρ=0,649g/l\nfor NG/biomethane (CH4)ρ=0,716g/l\nfor ethanol (E85) (C1H2,74O0,385)ρ=0,934g/l\nNitrogen oxides (NOx)ρ=2,05g/l\nThe density for NMHC mass calculations shall be equal to that of total hydrocarbons at 273,15 K (0 °C) and 101,325 kPa, and is fuel-dependent. The density for propane mass calculations (see paragraph 3.5. in Sub-Annex 5) is 1,967 g/l at standard conditions.\nIf a fuel type is not listed in this paragraph, the density of that fuel shall be calculated using the equation given in paragraph 3.1.3. of this Sub-Annex.\nρTHC=MWC+HC× MWH+OC× MWOVM\nwhere:\nρTHCis the density of total hydrocarbons and non-methane hydrocarbons, g/l;\nMWCis the molar mass of carbon (12,011 g/mol);\nMWHis the molar mass of hydrogen (1,008 g/mol);\nMWOis the molar mass of oxygen (15,999 g/mol);\nVMis the molar volume of an ideal gas at 273,15 K (0°C) and 101,325 kPa (22,413 l/mol);\nH/Cis the hydrogen to carbon ratio for a specific fuel CXHYOZ;\nO/Cis the oxygen to carbon ratio for a specific fuel CXHYOZ.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/7/division/division/3./division/3.1.",
    "retrieved_at": "2026-11-01T14:44:48.753743+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."
}