{
  "url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.2/division-2.2.4/division-2.2.4.2",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.2/division-2.2.4/division-2.2.4.2.json",
  "legislation": "eur/2017/654",
  "legislation_title": "Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-654",
  "path": "annex/VII/division/2/division/2.2/division/2.2.4/division/2.2.4.2",
  "kind": "division",
  "number": "2.2.4.2",
  "heading": "CFV-CVS system",
  "text": "The mass flow over the cycle m ed [g/test] shall be calculated by means of equation (7-37), if the temperature of the diluted exhaust gas is kept within ± 11 K over the cycle by using a heat exchanger:\nm ed = 1,293 × t × K V × p p T 0,5\n(7-37)\nWhere:\nt cycle time [s]\nK V calibration coefficient of the critical flow venturi for standard conditions K × m 4 × s ∕ kg\np p absolute pressure at venturi inlet [kPa]\nT absolute temperature at venturi inlet [K]\n1,293 kg/m3 air density at 273,15 K and 101,325 kPa\nIf a system with flow compensation is used (i.e. without heat exchanger), the mass of the diluted exhaust gas m ed, i [kg] during the time interval shall be calculated by means of equation (7-38):\nm ed, i = 1,293 × Δ t i × K V × p p T 0,5\n(7-38)\nwhere:\nΔti time interval of the test [s]\nK V calibration coefficient of the critical flow venturi for standard conditions K × m 4 × s ∕ kg\np p absolute pressure at venturi inlet [kPa]\nT absolute temperature at venturi inlet [K]\n1,293 kg/m3 air density at 273,15 K and 101,325 kPa",
  "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/2017/654/annex/VII/division/2/division/2.2/division/2.2.4/division/2.2.4.2",
    "retrieved_at": "2026-11-01T14:45:01.864924+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."
}