Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p133
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 133/150)
Character Range: 1093932–1096941

equipment exhaust after-treatment device.
The exhaust after-treatment system incorporating the replacement pollution control device shall then be preconditioned with 12 WHSC cycles. After this preconditioning, the engines shall be tested according to the WHDC procedures described in Annex 4. Three exhaust gas tests of each appropriate type shall be performed.
4.3.2.3. Initial evaluation of the emission of pollutants of engines equipped with replacement pollution control devices.
The requirements regarding emissions of the engines equipped with the replacement pollution control device shall be deemed to be fulfilled if the results for each regulated pollutant (CO, HC, NMHC, methane, NOx, NH3, particulate mass and particle number as appropriate for the type approval of the engine) meet the following conditions:
(1) M ≤ 0.85S + 0.4G
(2) M ≤ G
Where:
                  M: mean value of the emissions of one pollutant obtained from the three tests with the replacement pollution control device;
                  S: mean value of the emissions of one pollutant obtained from the three tests with the original or original replacement pollution control device;
                  G: limit value of the emissions of one pollutant according to the type approval of the vehicle.
              4.3.2.4. Durability of emissions performance

The exhaust after-treatment system tested in accordance with paragraph 4.3.2.2. and incorporating the replacement pollution control device shall be subjected to the durability procedures described in Appendix 4 to this annex.
4.3.2.5. Exhaust gas test with aged replacement pollution control device
The aged exhaust after-treatment system incorporating the aged replacement control device shall then be fitted to the test engine used in paragraphs 4.3.2.1. and 4.3.2.2.
The aged exhaust after-treatment systems shall be preconditioned with 12 WHSC cycles and subsequently tested using the WHDC procedures described in Annex 4. Three exhaust gas tests of each appropriate type shall be performed.
4.3.2.6. Determination of ageing factor for the replacement pollution control device
The ageing factor for each pollutant shall be the ratio of the applied emission values at the useful life end point and at the start of the service accumulation. (e.g. if the emissions of pollutant A at the useful life end point are 1.50 g/kWh and those at the start of the service accumulation are 1.82 g/kWh, the ageing factor is 1.82/1.50 = 1.21).
4.3.2.7. Evaluation of the emission of pollutants of engines equipped with replacement pollution control devices
The requirements regarding emissions of the engines equipped with the aged replacement pollution control device (as described in paragraph 4.3.2.5.) shall be deemed to be fulfilled if the results for each regulated pollutant (CO, HC, NMHC, methane, NOx, NH3, particulate mass and particle number as appropriate for the type approval of the engine) meet the following condition:
M*AF ≤ G
Where:
M: mean value of the emissions