Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:16:p92
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 16 (pt 92/108)
Character Range: 1147963–1151244

appendix.
              2.2.2. The test and vehicle conditions for the Type 1 test described in this Regulation apply before the first valid emission test is carried out.
              2.2.3. Regeneration shall not occur during the preparation of the vehicle. This may be ensured by one of the following methods:
                  (a) A "dummy" regenerating system or partial system may be fitted for the preconditioning cycles;
                  (b) Any other method agreed between the manufacturer and the responsible authority.
              2.2.4. A cold start exhaust emissions test including a regeneration process shall be performed according to the applicable WLTC.
              2.2.5. If the regeneration process requires more than one WLTC, each WLTC shall be completed. Use of a single particulate sample filter for multiple cycles required to complete regeneration is permissible.
              If more than one WLTC is required, subsequent WLTC(s) shall be driven immediately, without switching the engine off, until complete regeneration has been achieved. In the case that the number of gaseous emission bags required for the multiple cycles would exceed the number of bags available, the time necessary to set up a new test shall be as short as possible. The engine shall not be switched off during this period.
              2.2.6. The emission values during regeneration  for each compound i shall be calculated according to paragraph 3. of this appendix. The number of applicable test cycles  measured for complete regeneration shall be recorded.
              3. Calculations
              3.1. Calculation of the exhaust and CO2 emissions, and fuel consumption of a single regenerative system
              where for each compound i considered:
                   is the mass emissions of compound i over test cycle j without regeneration, g/km;
                   is the mass emissions of compound i over test cycle j during regeneration, g/km (if , the first WLTC test shall be run cold and subsequent cycles hot);
                   is the mean mass emissions of compound i without regeneration, g/km;
                   is the mean mass emissions of compound i during regeneration, g/km;
                   is the mean mass emissions of compound i, g/km;
                   is the number of test cycles, between cycles where regenerative events occur, during which emissions measurements on Type 1 WLTCs are made, and shall be  1;
                   is the number of complete applicable test cycles required for regeneration;
                   is the number of complete applicable test cycles between two cycles where regeneration events occur.
                  The calculation of  is shown graphically in Figure A6.App1/1.
Figure A6.App1/1
Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example, the emissions during D may increase or 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