{
  "url": "https://openlegislation.uk/eu-regulation-2017-2400/annex-V/division-4/division-4.3/division-4.3.5/division-4.3.5.4",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-2400/annex-V/division-4/division-4.3/division-4.3.5/division-4.3.5.4.json",
  "legislation": "eur/2017/2400",
  "legislation_title": "Commission Regulation (EU) 2017/2400 of 12 December 2017 implementing Regulation (EC) No 595/2009 of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles and amending Directive 2007/46/EC of the European Parliament and of the Council and Commission Regulation (EU) No 582/2011 (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-2400",
  "path": "annex/V/division/4/division/4.3/division/4.3.5/division/4.3.5.4",
  "kind": "division",
  "number": "4.3.5.4",
  "heading": "Preconditioning of the engine system",
  "text": "The dilution system, if applicable, and the engine shall be started and warmed up in accordance with paragraph 7.4.1. of Annex 4 to UN/ECE Regulation 49 Rev.06.\nAfter warm-up is completed, the engine and sampling system shall be preconditioned by operating the engine for 20 minutes at mode 9, as defined in Table 1 of paragraph 7.2.2. of Annex 4 to UN/ECE Regulation 49 Rev.06, while simultaneously operating the dilution system.\nThe engine full load curve of the CO2-parent engine of the engine CO2-family and recorded in accordance with paragraph 4.3.1 shall be used for the denormalization of the reference values of mode 9 performed in accordance with paragraphs 7.4.6, 7.4.7 and 7.4.8 of Annex 4 to UN/ECE Regulation 49 Rev.06.\nDirectly after completion of preconditioning, the target values for engine speed and torque shall be changed linearly within 20 to 46 seconds to match the first target setpoint of the test sequence according to paragraph 4.3.5.5. If the first target setpoint is reached within less than 46 seconds, the remaining time up to 46 seconds shall be used for stabilization.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/2400/annex/V/division/4/division/4.3/division/4.3.5/division/4.3.5.4",
    "retrieved_at": "2026-11-01T14:44:20.922900+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."
}