{
  "url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.2/division-2.2.4/division-2.2.4.3",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.2/division-2.2.4/division-2.2.4.3.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/2.2.4.3",
  "kind": "division",
  "number": "2.2.4.3",
  "heading": "SSV-CVS system",
  "text": "The diluted exhaust gas mass over the cycle m ed [kg/test] shall be calculated by means of equation (7-39), 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 · qV SSV · Δt\n(7-39)\nWhere:\n1,293 kg/m3 air density at 273,15 K and 101,325 kPa\nΔt cycle time [s]\nqV SSV air flow rate at standard conditions (101,325 kPa, 273,15 K) [m3/s]\nwith\nq V SSV = A 0 60 d 2 v C d P p 1 T r 1,4286 p − r 1,7143 p × 1 1 − r 4 D r 1,4286 p\n(7-40)\nWhere:\nA 0 collection of constants and units conversions = 0,0056940 m 3 min × K 1 2 kPa × 1 mm 2\nd V diameter of the SSV throat [mm]\nC d discharge coefficient of the SSV [-]\np p absolute pressure at venturi inlet [kPa]\nT in temperature at the venturi inlet [K]\nr p ratio of the SSV throat to inlet absolute static pressure, 1 − Δ P P a [-]\nr D ratio of the SSV throat diameter to the inlet pipe inner diameter d D [-]\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 (7-41):\nm ed, i = 1,293 · qV SSV · Δt i\n(7-41)\nWhere:\n1,293 kg/m3 air density at 273,15 K and 101,325 kPa\nΔti time interval [s]\nqV SSV volumetric flow rate of the SSV [m3/s]",
  "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/2.2.4.3",
    "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."
}