Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:16:p93
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 16 (pt 93/108)
Character Range: 1150886–1154078

decrease)

              3.1.1. Calculation of the regeneration factor  for each compound i considered
              The manufacturer may elect to determine for each compound independently either additive offsets or multiplicative factors.
               factor:
               offset:
              ,  and  results, and the manufacturer's choice of type of factor shall be recorded. The Ki result shall be included in all relevant test reports. Msi, Mpi and Ki results shall be included in all relevant test sheets.
               may be determined following the completion of a single regeneration sequence comprising measurements before, during and after regeneration events as shown in Figure A6.App1/1.
              3.2. Calculation of exhaust and CO2 emissions, and fuel consumption of multiple periodically regenerating systems
              The following shall be calculated for one Type 1 operation cycle for criteria emissions and for CO2 emissions. The CO2 emissions used for that calculation shall be from the result of step 3 described in Table A7/1 of Annex B7 and Table A8/5 of Annex B8.
               for

               factor:
               offset:
              where:
                   is the mean mass emissions of all events k of compound i without regeneration, g/km;
                   is the mean mass emissions of all events k of compound i during regeneration, g/km;
                   is the mean mass emission of all events k of compound i, g/km;
                   is the mean mass emissions of event k of compound i without regeneration, g/km;
                   is the mean mass emissions of event k of compound i during regeneration, g/km;
                   is the mass emissions of event k of compound i in g/km without regeneration measured at point j where , g/km;
                   is the mass emissions of event k of compound i during regeneration (when , the first Type 1 test is run cold, and subsequent cycles are hot) measured at test cycle j where , g/km;
                   is the number of complete test cycles of event k, between two cycles where regenerative phases occur, during which emissions measurements (Type 1 WLTCs or equivalent engine test bench cycles) are made, and shall be  1;
                   is the number of complete applicable test cycles of event k required for complete regeneration;
                   is the number of complete applicable test cycles of event k between two cycles where regenerative phases occur;
                   is the number of complete regeneration events.
The calculation of  is shown graphically in Figure A6.App1/2.

Figure A6.App1/2
Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example)
              The calculation of  for multiple periodically regenerating systems is only possible after a certain number of regeneration events for each system.
              After performing the complete procedure (A to B, see Figure A6.App1/2), the original starting condition A should be reached again.
              3.3. Ki factors and Ki offsets shall be rounded to four places of decimal. For Ki offsets, the rounding shall be based on