{
  "url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-4./division-4.4./division-4.4.4.",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-4./division-4.4./division-4.4.4..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/4/division/division/4./division/4.4./division/4.4.4.",
  "kind": "division",
  "number": "4.4.4",
  "heading": "Running resistance curve determination",
  "text": "The arithmetic average speed and arithmetic average torque at each reference speed point shall be calculated using the following equations:\nVjm=½×vjma+ vjmbCjm=½×Cjma+ CjmbThe following least squares regression curve of arithmetic average running resistance shall be fitted to all the data pairs (vjm, Cjm) at all reference speeds described in paragraph 4.4.2.1. of this Sub-Annex to determine the coefficients c0, c1 and c2.\nThe coefficients, c0, c1 and c2, and as well as the coastdown times measured on the chassis dynamometer (see paragraph 8.2.4. of this Sub-Annex) shall be included in all relevant test sheets.\nIn the case that the tested vehicle is the representative vehicle of a road load matrix family, the coefficient c1 shall be set to zero and the coefficients c0 and c2 shall be recalculated with a least squares regression analysis.",
  "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/4/division/division/4./division/4.4./division/4.4.4.",
    "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."
}