Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p147
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 147/150)
Character Range: 1134818–1138011

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 "top-offs", since oil level influences the oil consumption rate. Any suitable method, as for example the one described in the ASTM standard D7156-09, may be used.

              2.4.4.4. The theoretical time, in hours, that the thermal accumulation schedule or modified thermal accumulation schedule, as it corresponds, would have to be conducted, in order to obtain the same lubricant consumption as the one corresponding to the useful life of the replacement control device, shall be calculated by applying the following equation:

              Equation 6:

              Where:

              tTAS = theoretical duration, in hours, of the service accumulation schedule required to obtain the same lubricant consumption as the one corresponding to the useful life of the replacement pollution control device, provided that the service accumulation schedule is only made up of a series of consecutive thermal sequences or consecutive modified thermal sequences.

              LCRWHTC = lubricant consumption rate, in g/h determined as set out in paragraph 2.2.15.

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

              LCRTAS = lubricant consumption rate, in g/h, determined as set out in paragraph 2.4.4.2.

              2.4.4.5. The number of thermal sequences or modified thermal sequences corresponding to tTAS shall be calculated by applying the following ratio:

              Equation 7:

              Where:

              N = number of thermal sequences or modified thermal sequences corresponding to tTAS.

              tTAS = theoretical duration, in hours, of the service accumulation schedule required to obtain the same lubricant consumption as the one corresponding to the useful life of the replacement pollution control device, provided that the service accumulation schedule was only made up of a series of consecutive thermal sequences or consecutive modified thermal sequences.

              tTS = duration, in hours, of a single thermal sequence or modified thermal sequence.

              2.4.4.6. The value of N shall be compared to the value of NTS calculated in accordance with paragraph 2.4.2.6. or, for devices operating in the presence of active regeneration, in accordance with paragraph 2.4.3.5. If N ≤ NTS, it is not necessary to add a lubricant consumption accumulation schedule to the thermal accumulation schedule. If N > NTS, a lubricant consumption accumulation schedule shall be added to the thermal accumulation schedule.

              2.4.4.7. A lubricant consumption accumulation schedule may not have to be added if, by increasing the lubricant consumption as described in paragraph 2.4.4.8.4., the needed lubricant consumption is already achieved with the conduction of the corresponding thermal accumulation schedule consisting of the performance of NTS thermal