Document ID: chunk:federal_register_of_legislation:F2022C00213:reg:120:p27
Version: federal_register_of_legislation:F2022C00213
Segment Type: reg
Provision Reference: reg 120 (pt 27/30)
Character Range: 432650–435601

dioxide emission and fuel consumption during regeneration

       3.2.1. Preparation of the vehicle, if required, for the emissions test during a regeneration phase, may be completed using the preparation cycles in paragraph 6.3. of Annex 4a of Regulation No. 83 or equivalent engine test bench cycles, depending on the loading procedure chosen in paragraph 3.1.2. above.

       3.2.2. The test and vehicle conditions for the test described in Annex 6 apply before the first valid emission test is carried out.

       3.2.3. Regeneration must not occur during the preparation of the vehicle.  This may be ensured by one of the following methods:

       3.2.3.1. A "dummy" regenerating system or partial system may be fitted for the pre-conditioning cycles.

       3.2.3.2. Any other method agreed between the manufacturer and the type approval authority.

       3.2.4. A cold-start exhaust emission test including a regeneration process shall be performed according to the Type I operating cycle, or equivalent engine test bench cycle.  If the emissions tests between two cycles where regeneration phases occur are carried out on an engine test bench, the emissions test including a regeneration phase shall also be carried out on an engine test bench.

       3.2.5. If the regeneration process requires more than one operating cycle, subsequent test cycle(s) shall be driven immediately, without switching the engine off, until complete regeneration has been achieved (each cycle shall be completed).  The time necessary to set up a new test should be as short as possible (e.g. particular matter filter change).  The engine must be switched off during this period.

       3.2.6. The carbon dioxide emission and fuel consumption values during regeneration (Mri) shall be calculated according to Annex 6.  The number of operating cycles (d) measured for complete regeneration shall be recorded.

       3.3. Calculation of the combined carbon dioxide emission and fuel consumption of a single regenerative system
 (1)  n  2
 (2)
 (3)
 where for each carbon dioxide emission and fuel consumption considered:
                     M'sij = mass emissions of CO2 in g/km and fuel consumption in l/100 km over one part (i) of the operating cycle (or equivalent engine test bench cycle) without regeneration;
                     M'rij = mass emissions of CO2 in g/km and fuel consumption in l/100 km over one part (i) of the operating cycle (or equivalent engine test bench cycle) during regeneration. (when n > 1, the first Type I test is run cold, and subsequent cycles are hot);
                     Msi = mean mass emissions of CO2 in g/km and fuel consumption in l/100 km over one part (i) of the operating cycle without regeneration;
                     Mri = mean mass emissions of CO2 in g/km and fuel consumption in l/100 km over one part (i) of the operating cycle during regeneration;
                     Mpi = mean mass emission of CO2