Document ID: chunk:federal_register_of_legislation:F2012C00283:reg:12:p7
Version: federal_register_of_legislation:F2012C00283
Segment Type: reg
Provision Reference: reg 12 (pt 7/10)
Character Range: 437473–440603

table with those measured in the whole vehicle or bench ageing durability test.
              1.6. Deterioration factors are determined using either the procedures set out in paragraphs 1.2. and 1.3. or using the assigned values in the table referred in paragaph 1.4. The deterioration factors are used to establish compliance with the requirements of the appropriate emissions limits set out in Table 1 in paragraph 5.3.1.4. of this Regulation during the useful life of the vehicle.
              2. Technical requirements
              2.1. As an alternative to the operating cycle described in paragraph 6.1. for the whole vehicle durability test, the vehicle manufacturer may use Standard Road Cycle (SRC) described in Appendix 3 of this annex. This test cycle shall be conducted until the vehicle has covered a minimum of 160,000 km.
              2.2. Bench Ageing Durability Test
              2.2.1. In addition to the technical requirements for the bench ageing test set out in paragraph 1.3., the technical requirements set out in this section shall apply.
              2.3. The fuel to be used during the test shall be the one specified in paragraph 4.
              2.3.1. Vehicles with Positive Ignition Engines
              2.3.1.1. The following bench ageing procedure shall be applicable for positive-ignition vehicles including hybrid vehicles which use a catalyst as the principle after-treatment emission control device.
               The bench ageing procedure requires the installation of the catalyst-plus-oxygen sensor system on a catalyst 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 Standard Road Cycle (SRC), described in Appendix 3 of this annex.
              2.3.1.2. Standard bench cycle (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 of 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 of this annex.
                Catalyst temperature shall be measured at the highest temperature location in the hottest catalyst on the test vehicle. Alternatively, the temperature may be measured at another location providing that it is adjusted to represent the temperature measured at the hottest location using good engineering judgement.
                Catalyst temperature shall be measured at a minimum rate of one hertz (one measurement per second).
                The measured catalyst temperature results shall be tabulated into a histogram with temperature groups of no larger than 25 °C.
              2.3.1.4. Bench-ageing time. Bench ageing time shall be calculated using the bench ageing time (BAT) equation as follows:
                te for a temperature bin = th e((R/Tr)-(R/Tv))