Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:10:p15
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 10 (pt 15/32)
Character Range: 1311294–1314558

number emission, particles per kilometre;
                   is the volume of the diluted exhaust gas in litres per test (after primary dilution only in the case of double dilution) and corrected to standard conditions (273.15 K (0 °C) and 101.325 kPa);
                   is a calibration factor to correct the PNC measurements to the level of the reference instrument where this is not applied internally within the PNC. Where the calibration factor is applied internally within the PNC, the calibration factor shall be 1;
                   is the corrected particle number concentration from the diluted exhaust gas expressed as the arithmetic average number of particles per cubic centimetre from the emissions test including the full duration of the drive cycle. If the volumetric mean concentration results  from the PNC are not measured at standard conditions (273.15 K (0 °C) and 101.325 kPa), the concentrations shall be corrected to those conditions ;
                   is either the dilution air or the dilution tunnel background particle  number concentration, as permitted by the responsible authority, in particles per cubic centimetre, corrected to standard conditions (273.15 K (0 °C) and 101.325 kPa);
                   is the mean particle concentration reduction factor of the VPR at the dilution setting used for the test;
                   is the mean particle concentration reduction factor of the VPR at the dilution setting used for the background measurement;
                   is the distance driven corresponding to the applicable test cycle, km.
               shall be calculated using the following equation:
           where:
                   is a discrete measurement of particle number concentration in the diluted gas exhaust from the PNC; particles per cm³;
                   is the total number of discrete particle number concentration measurements made               during the applicable test cycle and shall be calculated using the following equation:
              where:
               is the time duration of the applicable test cycle, s;
               is the data logging frequency of the particle counter, Hz.
              5. Calculation of cycle energy demand
              Unless otherwise specified, the calculation shall be based on the target speed trace given in discrete time sample points.
              The total energy demand E for the whole cycle or a specific cycle phase shall be calculated by summing  over the corresponding cycle time between tstart +1 and tend according to the following equation:
              where:
               if
               if
              and:
                     tstart is the time at which the applicable test cycle or phase starts (see paragraph 3. of Annex B1), s;
                     tend is the time at which the applicable test cycle or phase ends (see paragraph 3. of Annex B1), s;
                      is the energy demand during time period (i-1) to (i), Ws;
                      is the driving force during time period (i-1) to (i), N;
                      is the distance travelled during time period (i-1) to (i), m.
              where:
                      is the driving force during time period (i-1) to (i), N;
                      is the