Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:16:p105
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 16 (pt 105/108)
Character Range: 1185074–1188342

+  x  +  x  + (TM + ) x

               =  x  x 0,001

               =

               =

              where:

                      is the target driving force during the period from (i-1) to (i), N;

                       is the actual/measured driving force during the period from (i-1) to (i), N;

                      is the target power during the period from (i-1) to (i), kW;

                       is the actual/measured power during the period from (i-1) to (i), kW;

                     , ,  are the road load coefficients from Annex B4, N, N/(km/h), N/(km/h)2;

                      is the target speed at time (i); km/h;

                      is the actual/measured speed at time (i); km/h;

                     TM is the test mass of the vehicle, kg;

                       is the equivalent effective mass of rotating components in accordance with paragraph 2.5.1. of Annex B4, kg;

                       is the target acceleration during the period from (i-1) to (i), m/s2;

                       is the actual/measured acceleration during the period from (i-1) to (i), m/s2;

                is the time, s.

              3.2. In the next step an initial POVERRUN,1 is calculated using the following equation:

              POVERRUN,1 = - 0,02 x PRATED

              where:

              POVERRUN,1 is the initial overrun power, kW;

              PRATED  is the rated engine power, kW.

              3.3. All calculated  and  values that are below POVERRUN,1 shall be set to POVERRUN,1 in order to exclude negative values not relevant for the CO2 emissions.

              3.4. The  values shall be calculated for each individual phase of the WLTC using the following equation:

               = /n

              where:

                      is the average actual/measured power of the considered phase j, kW;

                      is the actual/measured power during the period from (i-1) to (i), kW;

                      is the time at the beginning of the considered phase j, s;

                      is the time at the end of the considered phase j, s;

                     n is the number of time steps in the considered phase;

                     j is the index number for the considered phase.

              3.5. The average RCB corrected CO2 emissions (g/km) for each phase of the applicable WLTC shall be expressed in units g/s using the following equation:

               =  x

              where:

                      is the average CO2 emission of phase j, g/s;

                      is the CO2 emission from step 1 of Table A7/1 of Annex B7 for the considered WLTC phase j corrected in accordance with Appendix 2 to Annex B6, and with the requirement of applying the RCB correction;

                      is the actually driven distance of the considered phase j, km;

                      is the duration of considered phase j, s.

              3.6. In the next step these CO2 emissions (g/s) for each phase of the WLTC shall be correlated to the average  values calculated in accordance with paragraph 3.4. of this Annex B6b.

              The best fit of the data shall be calculated using the least square regression method. An example for this regression line (Veline line) is shown in Figure A6b