{
  "url": "https://openlegislation.uk/eu-regulation-2017-2400/annex-VII/division-4/division-4.4/division-4.4.6",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-2400/annex-VII/division-4/division-4.4/division-4.4.6.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/division/4/division/4.4/division/4.4.6",
  "kind": "division",
  "number": "4.4.6",
  "heading": "Uncertainty calculation",
  "text": "The total uncertainty UT,loss of the torque loss shall be calculated based on the following parameters:\ni.. Temperature effect\nii.. Parasitic loads\niii.. Uncertainty (incl. sensitivity tolerance, linearity, hysteresis and repeatability)\nThe total uncertainty of the torque loss (UT,loss) is based on the uncertainties of the sensors at 95 % confidence level. The calculation shall be done for each applied sensor (e.g. three machine lay out: UT,in, UT,out,1, UTout,2) as the square root of the sum of squares (‘Gaussian law of error propagation’).\nU T,loss = U 2 T,in + ∑ U T,out i gear 2 U T,in ∕ out = 2 × U 2 TKC + U 2 TK 0 + U 2 cal + U 2 para U TKC = 1 3 × w tkc K ref × Δ K × T c U TK 0 = 1 3 × w tk 0 K ref × Δ K × T n U cal = 1 × w cal k cal × T n U para = 1 3 × w para × T n wpara = senspara * ipara\nwhere:\nUT,in/out Uncertainty of input/output torque loss measurement separately for input and output torque; [Nm]\nigear Axle gear ratio [-]\nUTKC Uncertainty by temperature influence on current torque signal; [Nm]\nwtkc Temperature influence on current torque signal per Kref, declared by sensor manufacturer; [%]\nUTK0 Uncertainty by temperature influence on zero torque signal (related to nominal torque) [Nm]\nwtk0 Temperature influence on zero torque signal per Kref (related to nominal torque), declared by sensor manufacturer; [%]\nKref Reference temperature span for tkc and tk0, declared by sensor manufacturer; [°C]\nΔK Absolute difference in sensor temperature measured at torque sensor between calibration and measurement; If the sensor temperature cannot be measured, a default value of ΔK = 15 K shall be used [°C]\nTc Current/measured torque value at torque sensor; [Nm]\nTn Nominal torque value of torque sensor; [Nm]\nUcal Uncertainty by torque sensor calibration; [Nm]\nwcal Relative calibration uncertainty (related to nominal torque); [%]\nkcal calibration advancement factor (if declared by sensor manufacturer, otherwise = 1)\nUpara Uncertainty by parasitic loads; [Nm]\nwpara senspara * ipara\nRelative influence of forces and bending torques caused by misalignment\nsenspara Maximum influence of parasitic loads for specific torque sensor declared by sensor manufacturer [%]; if no specific value for parasitic loads is declared by the sensor manufacturer, the value shall be set to 1,0 %\nipara Maximum influence of parasitic loads for specific torque sensor depending on test set-up as indicated in section 4.2.3 and 4.2.4 of this annex.",
  "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/division/4/division/4.4/division/4.4.6",
    "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."
}