{
  "url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/1/division/division-8./division-8.2./division-8.2.1.",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/1/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/1/division/division/8./division/8.2./division/8.2.1.",
  "kind": "division",
  "number": "8.2.1",
  "heading": "Downscaling procedure for Class 1 vehicles",
  "text": "Figure A1/14 shows a downscaled medium speed phase of the Class 1 WLTC as an example.\nFigure A1/14\nDownscaled medium speed phase of the class 1 WLTC\nFor the Class 1 cycle, the downscaling period is the time period between second 651 and second 906. Within this time period, the acceleration for the original cycle shall be calculated using the following equation:\naorigi=vi+ 1− vi3,6where:\nviis the vehicle speed, km/h;\niis the time between second 651 and second 906.\nThe downscaling shall be applied first in the time period between second 651 and second 848. The downscaled speed trace shall be subsequently calculated using the following equation:\nvdsci+ 1=vdsci+ aorigi×1− fdsc× 3,6with i = 651 to 847.\nFor i = 651, vdsci=vorigi\nIn order to meet the original vehicle speed at second 907, a correction factor for the deceleration shall be calculated using the following equation:\nfcorr_dec=vdsc_848− 36,7vorig_848− 36,7where 36,7 km/h is the original vehicle speed at second 907.\nThe downscaled vehicle speed between second 849 and second 906 shall be subsequently calculated using the following equation:\nvdsci=vdsci− 1+ aorigi− 1× fcorr_dec× 3,6for i = 849 to 906.",
  "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/1/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."
}