{
  "url": "https://openlegislation.uk/eu-regulation-2017-2400/annex-VI/appendix-8",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-2400/annex-VI/appendix-8.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/VI/appendix/8",
  "kind": "appendix",
  "number": "8",
  "heading": null,
  "text": "Standard torque loss values - Transmission\nCalculated fallback values based on the maximum rated torque of the transmission:\nThe torque loss Tl,in related to the input shaft of the transmission shall be calculated by\nTl,in=Td0+Tadd0+Td1000+Tadd1000×nin1000rpm+fT+fT_add×Tinwhere:\nTl,in Torque loss related to the input shaft [Nm]\nTdx Drag torque at x rpm [Nm]\nTaddx Additional angle drive gear drag torque at x rpm [Nm]\n(if applicable)\nnin Speed at the input shaft [rpm]\nfT 1-η\nηefficiency\nfT 0,01 for direct gear, 0,04 for indirect gears\nfT_add 0,04 for angle drive gear (if applicable)\nTin Torque at the input shaft [Nm]\nFor transmissions with tooth shift clutches (Synchronised Manual Transmissions (SMT), Automated Manual Transmissions or Automatic Mechanically engaged Transmissions (AMT) and Dual Clutch Transmissions (DCT)) the drag torque Tdx is calculated by\nTdx=Td0=Td1000=10Nm×Tmaxin2000Nm=0,005×Tmaxinwhere:\nTmax,in Maximum allowed input torque in any forward gear of transmission [Nm]\nmax(Tmax,in,gear)\nTmax,in,gear Maximum allowed input torque in gear, where gear = 1, 2, 3,… top gear). For transmissions with hydrodynamic torque converter this input torque shall be the torque at transmission input before torque converter.\nFor transmissions with friction shift clutches (> 2 friction clutches) the drag torque Tdx is calculated by\nTdx=Td0=Td1000=30 Nm×Tmaxin2000Nm=0,015×TmaxinHere, ‘friction clutch’ is used in the context of a clutch or brake that operates with friction, and is required for sustained torque transfer in at least one gear.\nFor transmissions including an angle drive (e.g. bevel gear), the additional angle drive drag torque Taddx shall be included in the calculation of Tdx :\nTaddx=Tadd0=Tadd1000=10Nm×Tmaxin2000Nm=0,005×Tmaxin(only if applicable)",
  "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/VI/appendix/8",
    "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."
}