{
  "url": "https://openlegislation.uk/eu-decision-2020-1167/annex/division-3/division-3.3",
  "json_url": "https://openlegislation.uk/eu-decision-2020-1167/annex/division-3/division-3.3.json",
  "legislation": "eudn/2020/1167",
  "legislation_title": "Commission Implementing Decision (EU) 2020/1167 of 6 August 2020 on the approval of the technology used in a 48 Volt efficient motor-generator combined with a 48 Volt/12 Volt DC/DC converter for use in conventional combustion engine and certain hybrid electric passenger cars and light commercial vehicles as an innovative technology pursuant to Regulation (EU) 2019/631 of the European Parliament and of the Council) (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-decision-2020-1167",
  "path": "annex/division/3/division/3.3",
  "kind": "division",
  "number": "3.3",
  "heading": "Calculation of the uncertainty of the CO2 savings",
  "text": "The uncertainty of the CO2 savings calculated in accordance with point 3.2 shall be quantified.\nFor this, the following calculations are needed.\nFirst, the standard deviation of the efficiency of the 48V motor-generator at each operating point [%] shall be calculated in accordance with Formula 9.\nFormula 9\nwhere\nis the number of measurements j undertaken at each operating point i for the 48V motor-generator efficiency, as referred to in point 2.1\nis the efficiency of the 48V motor-generator calculated for an individual measurement j at operating point i as referred to in point 2.1 [%]\nis the average efficiency of the 48V motor-generator calculated for an operating point i, as determined in point 2.1 [%]\nNext, the standard deviation of the efficiency of the 48V motor-generator [%] shall be calculated in accordance with Formula 10.\nFormula 10\nwhere\nis as determined by Formula 9 [%]\nhi is the frequency of operating point i, as set out in Table 1.\nThen, the standard deviation of the efficiency of the 48V/12V DC/DC converter [%] shall be calculated in accordance with Formula 11.\nFormula 11\nwhere\nL is the number of measurements l undertaken for the 48V/12V DC/DC converter, as referred to in point 2.2\nis the efficiency of the 48V/12V DC/DC converter calculated for an individual measurement l as referred to in point 2.2 [%]\nis the efficiency of the 48V/12V DC/DC converter, as determined in point 2.2 [%]\nFinally, the uncertainty in the CO2 savings of the 48V motor-generator combined with the 48V/12V DC/DC converter shall be calculated in accordance with Formula 12 and shall not exceed 30 % of the CO2 savings.\nFormula 12\nwhere\nis the power requirement under ‘real-world’ conditions, which is 750 W\nis the power requirement under type-approval conditions, which is 350 W\nis the total efficiency of the 48V motor-generator combined with the 48V/12V DC/DC converter as determined in point 2.3 [%]\nis the consumption of effective power as specified in Table 2 [l/kWh]\nis the fuel conversion factor as specified in Table 3\nis the mean driving speed of the WLTP, which is 46,6 km/h\nis standard deviation of the efficiency of the 48V motor-generator as determined in accordance with Formula 10 [%]\nis the efficiency of the 48V motor-generator, as determined in point 2.1 [%]\nis the standard deviation of the efficiency of the 48V/12V DC/DC converter, as determined in accordance with Formula 11 [%]\nis the efficiency of the 48V/12V DC/DC converter as determined in point 2.2 [%]",
  "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/eudn/2020/1167/annex/division/3/division/3.3",
    "retrieved_at": "2026-11-01T15:12:11.705447+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."
}