Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:5:p4
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 5 (pt 4/36)
Character Range: 428160–431746

(ppm)     53,7
  NOx concd (ppm)     0,4
  COconce (ppm)       38,9
  COconcd (ppm)       1,0
  HCconce (ppm)       9,00
  HCconcd (ppm)       3,02
  CO2,conce (%)       0,723
  Wact (kWh)          62,72

              Calculation of the diluted exhaust gas flow (Annex III, Appendix 2, Section 4.1):

              Calculation of the NOx correction factor (Annex III, Appendix 2, Section 4.2):

              Calculation of the background corrected concentrations (Annex III, Appendix 2, Section 4.3.1.1):

              Assuming a diesel fuel of the composition C1H1,8

              Calculation of the emissions mass flow (Annex III, Appendix 2, Section 4.3.1):

         Calculation of the specific emissions (Annex III, Appendix 2, Section 4.4)

3.2.                            Particulate emissions (diesel engine)

              Assume the following test results for a PDP-CVS system with double dilution

MTOTW (kg)     4 237,2
Mf,p (mg)      3,030
Mf,b (mg)      0,044
MTOT (kg)      2,159
MSEC (kg)      0,909
  Md (mg)      0,341
MDIL (kg)      1,245
  DF           18,69
Wact (kWh)     62,72

              Calculation of the mass emission (Annex III, Appendix 2, Section 5.1):

              Calculation of the background corrected mass emission (Annex III, Appendix 2, Section 5.1):

              Calculation of the specific emission (Annex III, Appendix 2, Section 5.2):

3.3.                            Gaseous emissions (CNG engine)

              Assume the following test results for a PDP-CVS system with double dilution

  MTOTW (kg)          4 237,2
  Ha (g/kg)           12,8
  NOx conce (ppm)     17,2
  NOx concd (ppm)     0,4
  COconce (ppm)       44,3
  COconcd (ppm)       1,0
  HCconce (ppm)       27,0
  HCconcd (ppm)       3,02
  CH4 conce (ppm)     18,0
  CH4 concd (ppm)     1,7
  CO2,conce ( %)      0,723
  Wact (kWh)          62,72

              Calculation of the NOx, correction factor (Annex III, Appendix 2, Section 4.2):

              Calculation of the NMHC concentration (Annex III, Appendix 2, Section 4.3.1):

                (a)    GC method

                (b)    NMC method

                Assuming a methane efficiency of 0,04 and an ethane efficiency of 0,98 (see Annex III, Appendix 5, Section 1.8.4)

              Calculation of the background corrected concentrations (Annex III, Appendix 2, Section 4.3.1.1):

              Assuming a G20 reference fuel (100 % methane) of the composition C1H4:

              For NMHC, the background concentration is the difference between HCconcd and CH4concd

              Calculation of the emissions mass flow (Annex III, Appendix 2, Section 4.3.1):

              Calculation of the specific emissions (Annex III, Appendix 2, Section 4.4):

4.                                 λ-SHIFT FACTOR (Sλ)
4.1.                            Calculation of the λ-shift factor(Sλ) (1)
where:

              Sλ = λ-shift factor;
              inert % = % by volume of inert gases in the fuel (i.e. N2, CO2, He, etc.);
              O* = % by volume of original oxygen in the fuel;

         (1) Stoichiometric Air/Fuel ratios of automotive fuels - SAE J1829, June 1987. John B. Heywood, Internal combustion engine fundamentals, McGraw-Hill, 1988, Chapter 3.4 'Combustion stoichiometry' (pp. 68 to 72).

              n and m = refer to average CnHm representing the fuel hydrocarbons, i.e:

              where:

              CH4 = % by volume of methane in the fuel;

              C2 =% by volume of all C2 hydrocarbons (e.g. C2H6, C2H4, etc.) in the fuel;

              C3