Document ID: chunk:federal_register_of_legislation:F2024C00356:reg:7:p34
Version: federal_register_of_legislation:F2024C00356
Segment Type: reg
Provision Reference: reg 7 (pt 34/51)
Character Range: 629663–632682

of pollutant (i) in g/km,
 n                                        =  number of test points at which emissions measurements (Type I operating cycles or equivalent engine test bench cycles) are made between two cycles where regenerative phases occur,  2,
 d                                        =  number of operating cycles required for regeneration,
 D                                        =  number of operating cycles between two cycles where regenerative phases occur.

  For exemplary illustration of measurement parameters see Figure 8/1.

Figure 8/1
Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example, the emissions during "D" may increase or decrease)

              3.3.1. Calculation of the regeneration factor K for each pollutant (i) considered
               Ki = Mpi / Msi
               Msi, Mpi and Ki results shall be recorded in the test report delivered by the  Technical Service.
               Ki may be determined following the completion of a single sequence.
              3.4. Calculation of combined exhaust emissions of multiple periodic regenerating  systems
  (1)        nk ≥ 2
  (2)
  (3)
  (4)
  (5)
  (6)
  (7)
Where:
 Msi      =  mean mass emission of all events k of pollutant (i) in g/km without regeneration,

 Mri      =  mean mass emission of all events k of pollutant (i) in g/km during regeneration,

 Mpi      =  mean mass emission of all events k of pollutant (i) in g/km,

 Msik     =  mean mass emission of event k of pollutant (i) in g/km without regeneration,

 Mrik     =  mean mass emission of event k of pollutant (i) in g/km during regeneration,

 M'sik,j  =  mass emissions of event k of pollutant (i) in g/km over one Type I operating cycle (or equivalent engine test bench cycle) without regeneration measured at point j; 1 ≤ j ≤ nk,

 M'rik,j  =  mass emissions of event k of pollutant (i) in g/km over one Type I operating cycle (or equivalent engine test bench cycle) during regeneration (when j > 1, the first Type I test is run cold, and subsequent cycles are hot) measured at               operating cycle j; 1 ≤ j ≤ nk,

 nk       =  number of test points of event k at which emissions measurements (Type I operating cycles or equivalent engine test bench cycles) are made between two cycles where regenerative phases occur,  2,
 dk       =  number of operating cycles of event k required for regeneration,
 Dk       =  number of operating cycles of event k between two cycles where  regenerative phases occur.

For an illustration of measurement parameters see Figure 8/2 (below)

Figure 8/2
Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example)

    For more details of the schematic process see Figure 8/3

Figure 8/3
Parameters measured during emissions test during and between cycles where regeneration occurs (schematic example)

For application of a simple and realistic case, the following description gives a detailed