Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:10:p13
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 10 (pt 13/32)
Character Range: 1305147–1308420

axle tyres on the individual vehicle, kg/tonne;
                             is the proportion of the vehicle mass in running order on the front axle.
              RRx shall not be rounded or categorised to tyre energy efficiency classes.
              3.2.4.1.1.3. Frontal area of an individual vehicle
              The frontal area for vehicle LM, AfLM, and vehicle HM, AfHM, selected under paragraph 4.2.1.4. of Annex B4 shall be used as input.
              Af,ind, in m2, shall be the frontal area of the individual vehicle.
              If the same frontal area is used for vehicles LM and HM, the value of Af,ind shall be set to the frontal area of vehicle HM for the road load matrix family method.
              3.2.5. Alternative interpolation calculation method
              Upon request of the manufacturer and with approval of the responsible authority, a manufacturer may apply an alternative interpolation calculation procedure in the case that the interpolation method creates unrealistic phase-specific results or an unrealistic road load curve. Before such permission is granted, the manufacturer shall check and where possible correct:
                  (a) The reason for having small differences between the road load relevant characteristics between vehicle L and H in the case of unrealistic phase- specific results;
                  (b) The reason for having an unexpected difference between the f1,L and f1,H coefficients in the case of an unrealistic road load curve.
              The request of the manufacturer to the responsible authority shall include evidence that such a correction is not possible, and that the resultant error is significant.
              3.2.5.1. Alternative calculation to correct unrealistic phase-specific results
              Alternatively to the procedures defined in paragraphs 3.2.3.2.4. and 3.2.3.2.5. of this annex, calculations of phase CO2, phase fuel efficiency and phase fuel consumption may be calculated according to the equations in paragraphs 3.2.5.1.1., 3.2.5.1.2. and 3.2.5.1.3. below.
              For each parameter, MCO2 is replaced by FC or FE.
              3.2.5.1.1. Ratio determination for each phase of VL and VH
              where:
               are from step 9 in Table A7/1 in this annex.
              3.2.5.1.2. Ratio determination for each phase for vehicle Vind
              where:
                   is from step 10 in Table A7/1 in this annex and shall be rounded to the nearest whole number.
              3.2.5.1.3. Phase per phase mass emission of vehicle Vind
              3.2.5.2. Alternative calculation to correct an unrealistic road load curve
              Alternatively to the procedure defined in paragraph 3.2.3.2.2.4. of this annex, road load coefficients may be calculated as follows:
              Applying the least squares regression method in the range of the reference speed points, alternative adjusted road load coefficients f*0,i and f*2,i shall be determined for Fi(v) with the linear coefficient f*1,i set to f1,A. f1,A is calculated as follows:
              where:
                  E is the cycle energy demand as defined in paragraph 5. of this annex, Ws;
                  i is the subscript denoting vehicles L, H or ind;
                  HR