{
  "url": "https://openlegislation.uk/eu-regulation-2017-2400/annex-VII/appendix-3",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-2400/annex-VII/appendix-3.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/VII/appendix/3",
  "kind": "appendix",
  "number": "3",
  "heading": null,
  "text": "Calculation of the standard torque loss\nThe standard torque losses for axles are shown in Table 1. The standard table values consist of the sum of a generic constant efficiency value covering the load dependent losses and a generic basic drag torque loss to cover the drag losses at low loads.\nTandem axles shall be calculated using a combined efficiency for an axle including drive-thru (SRT, HRT) plus the matching single axle (SR, HR).\nTable 1\nGeneric efficiency and drag loss\nBasic function\nGeneric efficiencyη\nDrag torque(wheel side)Td0 = T0 + T1 * igear\nSingle reduction axle (SR)\n0,98\nT0 = 70 Nm\nT1 = 20 Nm\nSingle reduction tandem axle (SRT) /\nsingle portal axle (SP)\n0,96\nT0 = 80 Nm\nT1 = 20 Nm\nHub reduction axle (HR)\n0,97\nT0 = 70 Nm\nT1 = 20 Nm\nHub reduction tandem axle (HRT)\n0,95\nT0 = 90 Nm\nT1 = 20 Nm\nThe basic drag torque (wheel side) Td0 is calculated by\nTd0 = T0 + T1 * igear\nusing the values from Table 1.\nThe standard torque loss Tloss,std on the wheel side of the axle is calculated by\nT loss,std = T d 0 + T out η − T out\nwhere:\nTloss,std Standard torque loss at the wheel side [Nm]\nTd0 Basis drag torque over the complete speed range [Nm]\nigear Axle gear ratio [-]\nη Generic efficiency for load dependent losses [-]\nTout Output torque [Nm]",
  "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/VII/appendix/3",
    "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."
}