{
  "url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/6n3/division/division-2.",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/6n3/division/division-2..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/6n3/division/division/2.",
  "kind": "division",
  "number": "2",
  "heading": "Calculation of the gas energy ratio",
  "text": "The fuel consumption value shall be calculated from the emissions of hydrocarbons, carbon monoxide, and carbon dioxide determined from the measurement results assuming that only the gaseous fuel is burned during the test.\nThe gas ratio of the energy consumed in the cycle shall be determined using the following equation:\nGgas=Mgas×cf×104FCnorm×dist×ρ\nwhere:\nGgasis the gas energy ratio, per cent;\nMgasis the mass of the gaseous fuel consumed during the cycle, kg;\nFCnormis the fuel consumption (l/100 km for LPG, m3/100 km for NG/biomethane) calculated in accordance with paragraphs 6.6. and 6.7. of Sub-Annex 7;\ndistis the distance recorded during the cycle, km;\nρis the gas density:\nρ = 0,654 kg/m3 for NG/Biomethane;\nρ = 0,538 kg/litre for LPG;\ncfis the correction factor, assuming the following values:\ncf = 1 in the case of LPG or G20 reference fuel;\ncf = 0,78 in the case of G25 reference fuel.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Regulation (EU) 2018/1832 of 5 November 2018 amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) 2017/1151 for the purpose of improving the emission type approval tests and procedures for light passenger and commercial vehicles, including those for in-service conformity and real-driving emissions and introducing devices for monitoring the consumption of fuel and electric energy (Text with EEA relevance)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/6n3/division/division/2.",
    "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."
}