Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p143
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 143/150)
Character Range: 1123518–1126683

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 of the replacement pollution control device at the temperature Ti during the second i.

              Ti = the temperature, in K, measured in the second i, in each one of the thermal sequences.

              R = thermal reactivity of the replacement pollution control device. The manufacturer shall agree with the Type Approval Authority on the R value to be used. It will also be possible, as alternative, to use the following default values:

              Diesel Oxidation Catalyst (DOC): 18,050

              Catalysed DPF: 18,050

              SCR or ammonia oxidation catalyst (AMOX) based on iron-zeolite
              (Fe-Z): 5,175

              SCR copper-zeolite (Cu-Z): 11,550

              SCR Vanadium (V): 5,175

              LNT (lean-NOx trap): 18,050

              Tr = reference temperature, in K, being the same value as in equation 1.

              AE = 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 of the replacement pollution control device during the duration of the thermal sequence.

              AT = total equivalent 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 of the replacement pollution control device, over its useful life, to the temperature during the time of each one of the i bins registered in the histogram.

              i = number of temperature measurement.

              p = total number of temperature measurements.

              nc = thermal sequence number, of those conducted for the purpose of temperature gathering, in accordance with paragraph 2.4.2.3.

              C = total number of thermal sequences conducted for the purpose of temperature gathering.

              2.4.2.6. The total number of thermal sequences to be included in the service accumulation schedule shall be determined by applying the following equation:

              Equation 5:

              NTS = AT/AE

              Where:

              NTS = total number of thermal sequences to be carried out during the service accumulation schedule.

              AT = total equivalent 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 of the replacement pollution control device, over its useful life, to the temperature  during the time  of each one of the i bins registered in the histogram.

              AE = 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