Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:23:p4
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 23 (pt 4/15)
Character Range: 1907618–1910678

test.

              1.6. Deterioration factors are determined using either the procedures set out in paragraphs 1.2. and, where applicable, paragraph 1.3. of this annex, or using the assigned values in the table referred in paragraph 1.4. of this annex. The deterioration factors are used to establish compliance with the requirements of the appropriate emissions limits set out in paragraph 6.3.10. of this Regulation during the target useful life of the vehicle.

              1.7. This paragraph is applicable for Level 1B only

              Notwithstanding the requirement of this annex, in the case that the vehicle that reached mileage of target useful life by pattern A or pattern B described in Appendix 3b to this annex is provided to the type approval authority and the result of Type 1 test with the vehicle fulfil the criteria of Table 1B described in paragraph 6.3.10. of this Regulation, the durability requirement is regarded to be satisfied.

              2. Technical requirements

              2.1. As the operating cycle for the whole vehicle durability test, the vehicle manufacturer shall use the Standard Road Cycle (SRC) described in Appendix 3 to this annex. This test cycle shall be conducted until the vehicle has covered its target useful life.

              For Level 1B only:

              As the operating cycle for the whole vehicle durability test, the vehicle manufacturer shall choose one of the driving cycles described in Appendix 3b to this annex.

              2.2. Bench ageing durability test

               This paragraph applies to Level 1A only

              2.2.1. For the execution of the bench ageing durability tests the vehicle used for the catalyst and/or particle filter temperature measurements shall be VH.

              The fuel to be used during the test shall be the one specified in paragraph 4. of this annex.

              2.3. This paragraph applies to Level 1A only

              The bench ageing durability test to be used shall be the one appropriate to the type of engine, as detailed in paragraphs 2.3.1. and 2.3.2. of this annex.

              2.3.1. Vehicles with positive ignition engines

              2.3.1.1.  The bench ageing procedure requires the installation of the whole exhaust after-treatment system on an ageing bench.

                Ageing on the bench shall be conducted by following the Standard Bench Cycle (SBC) for the period of time calculated from the Bench Ageing Time (BAT) equation. The BAT equation requires, as input, catalyst time-at-temperature data measured on the SRC, as described in paragraph 2.3.1.3.

              2.3.1.2. SBC

               Standard catalyst bench ageing shall be conducted following the SBC. The SBC shall be run for the period of time calculated from the BAT equation. The SBC is described in Appendix 1 to this annex.

              2.3.1.3. Catalyst time-at-temperature data

               Catalyst temperature shall be measured during at least two full cycles of the SRC cycle as described in Appendix 3 to this annex.