Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p142
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 142/150)
Character Range: 1120461–1123823

and n the value for the bin with the highest temperature.

              n = total number of temperature bins.

              2.3.5.  In the case referred to in paragraph 2.2.13., AT shall be calculated for each device.

              2.4. Service accumulation schedule

              2.4.1. General requirements

              2.4.1.1. The service accumulation schedule shall allow acceleration of the ageing of the replacement pollution control device, using the information gathered during the data collection phase set out in paragraph 2.2.

              2.4.1.2. The service accumulation schedule shall consist of a thermal accumulation schedule and a lubricant consumption accumulation schedule in accordance with paragraph 2.4.4.6. The manufacturer, in agreement with the Type Approval Authority, may not have to carry out a lubricant consumption accumulation schedule in case the replacement pollution control devices are placed downstream of an after-treatment filter component (e.g. diesel particulate filter). Both the thermal accumulation schedule and the lubricant consumption accumulation schedule shall consist of a repetition of, respectively, a series of thermal and lubricant consumption sequences.

              2.4.1.3. In the case of replacement pollution control devices operating in the presence of active regeneration, the thermal sequence shall be complemented with an active regeneration mode.

              2.4.1.4. For service accumulation schedules consisting of both thermal and lubricant consumption accumulation schedules, their respective sequences shall be alternated, so that for each thermal sequence that has to be performed, the following sequence corresponds to lubricant consumption.

              2.4.1.5. It is allowed to perform the service accumulation schedule at the same time for different devices. In that case, a single service accumulation schedule shall be set for all the devices.

              2.4.2. Thermal accumulation schedule

              2.4.2.1. The thermal accumulation schedule shall simulate the effect of thermal ageing on the performance of a replacement pollution control device until the end of its lifetime.

              2.4.2.2. The engine used for the performance of the service accumulation schedule, fitted with the exhaust after-treatment system incorporating the replacement pollution control device, is operated for a minimum of three consecutive thermal sequences, as set out in Appendix 5.

              2.4.2.3. The temperatures shall be recorded over a minimum of two thermal sequences. The first sequence, conducted for warming up, shall not be taken into account for the purpose of temperature gathering.

              2.4.2.4. The temperatures shall be recorded at suitable locations, chosen in accordance with paragraphs 2.2.6. to 2.2.9., at a minimum rate of once every second (1 Hz).

              2.4.2.5. The effective ageing time corresponding to the thermal sequences referred to in paragraph 2.4.2.3., shall be calculated in accordance with the following equations:

              Equation 3:

              Equation 4:

              Where:

               = the effective ageing time, in hours, needed to achieve, by exposing the replacement pollution control device at the temperature Tr, the same amount of ageing as the one that would result from exposure