OpenLegislation

Division 7 CALCULATION OF THE STATISTICAL MARGIN

United Kingdom

Original text. Later amendments are not shown.

The statistical margin in the results of the testing methodology is to be quantified. The statistical margin of the total CO2 saving shall not exceed 0,5 g CO2/km as expressed in the following Formula 5:

Formula 5:

s C CO 2 ≤ 0,5 gCO 2 ∕ km

Where,

s C CO 2

  • Statistical margin of the total CO2 savings [g CO2/km].

    • The statistical margin shall be calculated in accordance with the following Formula 6:

    Formula 6

    s C CO 2 = c × UF × s B TA hot 2 + − UF × s E MC 2 + c × B TA hot − E MC × s UF 2

    Where,

    s C CO 2

  • Statistical margin of the total CO2 savings [g CO2/km];

    • c

  • Conversion parameter which is 0,960;

    • B TA hot

  • Arithmetic mean of the CO2 emission of the baseline vehicle under type approval hot start conditions [gCO2/km];

    • s B TA hot

  • Standard deviation of the arithmetic mean of the CO2 emission of the baseline vehicle under modified testing conditions [gCO2/km];

    • EMC

  • Arithmetic mean of the CO2 emission of the eco-innovation vehicle under modified testing conditions [gCO2/km];

    • s E MC

  • Standard deviation of the arithmetic mean of the CO2 emission of the eco-innovation vehicle under modified testing conditions [gCO2/km];

    • UF

  • Usage factor of the BMW engine idle coasting function which is 0,62; this value is representative only for the BMW fleet;

    • sUF

  • Standard deviation of the arithmetic mean of the usage factor, which is 0,019; this value is representative only for the BMW fleet.