Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p146
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 146/150)
Character Range: 1131981–1135060

shall be calculated using equations 3 and 4.

              2.4.3.6. The total number of modified thermal sequences to be conducted during the service accumulation schedule shall be calculated using equation 5.

              2.4.3.7. It is allowed to reduce NTS, and consequently the duration of the service accumulation schedule, by increasing the temperatures at each mode of the modified thermal sequence, applying one or several of the measures set out in paragraph 2.4.2.7.

              2.4.3.8. In addition to the measures referred to in paragraph 2.4.3.7., NTS can also be reduced by increasing the peak temperature of the active regeneration within the modified thermal sequence, without exceeding a bed temperature of 800 ºC under any circumstances.

              2.4.3.9. NTS shall never be less than 50 per cent of the number of active regenerations to which the replacement pollution control device is subjected during its useful life, calculated in accordance with the following equation:

Equation 5:
Where:
              NAR = number of active regeneration sequences over the useful life of the replacement pollution control device.

              tWHTC = equivalent number of hours corresponding to the vehicle category for which the replacement pollution control device is intended, obtained from Table 1.

              tAR = duration, in hours, of an active regeneration.

              tBAR= time, in hours, between two consecutive active regenerations.

              2.4.3.10. If, as consequence of the application of the minimum number of modified thermal sequences as set out in paragraph 2.4.3.9., × NTS calculated using equation 4 exceeds the AT calculated using equation 2, the time of each mode of the thermal sequence set out in Appendix 5, and embedded in the modified thermal sequence as set out in paragraph 2.4.3.2., may be reduced in the same proportion, in order to make AE × NTS = AT.

              2.4.3.11. It is allowed to increase NTS and consequently the duration of the service accumulation schedule, by lowering the temperatures at each mode of the thermal-active regeneration sequence by applying one or several of the measures set out in paragraph 2.4.2.9.

              2.4.3.12. In the case referred to in paragraphs 2.4.1.5., 2.4.2.10. and 2.4.2.11. shall apply.

              2.4.4. Lubricant consumption accumulation schedule

              2.4.4.1. The lubricant consumption accumulation schedule shall simulate the effect of ageing due to chemical poisoning or deposit formation as a result of lubricant consumption, on the performance of a replacement pollution control device at the end of its lifetime.

              2.4.4.2. The lubricant consumed, in g/h, shall be determined over a minimum of 24 thermal sequences or a corresponding number of modified thermal sequences, using any suitable method, as for example the drain and weigh procedure described in Appendix 7. Fresh lubricant shall be used.

              2.4.4.3. The engine shall be equipped with a constant volume oil sump in order to avoid the need of