{
  "url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-8./division-8.2./division-8.2.1.",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/4/division/division-8./division-8.2./division-8.2.1..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/4/division/division/8./division/8.2./division/8.2.1.",
  "kind": "division",
  "number": "8.2.1",
  "heading": "Initial load setting",
  "text": "For a chassis dynamometer of coefficient control, the chassis dynamometer power absorption unit shall be adjusted with the arbitrary initial coefficients, Ad, Bd and Cd, of the following equation:\nFd=Ad+ Bdv+ Cdv2where:\nFdis the chassis dynamometer setting load, N;\nvis the speed of the chassis dynamometer roller, km/h.\nThe following coefficients are recommended for the initial load setting:\n(a)Ad=0,5×atr′, Bd=0,2×btr′, Cd=ctr′for single-axis chassis dynamometers, or\nAd=0,1×atr′, Bd=0,2×btr′, Cd=ctr′for dual-axis chassis dynamometers, where:\nat, bt and ct are are the target running resistance coefficients; and\nr′ is the dynamic radius of the tyre on the chassis dynamometer obtained at 80 km/h, m.; or\n(b)Empirical values, such as those used for the setting for a similar type of vehicle.\nFor a chassis dynamometer of polygonal control, adequate load values at each reference speed shall be set for the chassis dynamometer power absorption unit.",
  "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/4/division/division/8./division/8.2./division/8.2.1.",
    "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."
}