Document ID: chunk:federal_register_of_legislation:F2022C00213:reg:120:p55
Version: federal_register_of_legislation:F2022C00213
Segment Type: reg
Provision Reference: reg 120 (pt 55/56)
Character Range: 334430–337037

in paragraph 6.6. of Annex 4a of Regulation No. 83 in force at the time of the approval of the vehicle.

     1.4.1.1. For this calculation the density of CO2 shall be QCO2 = 1.964 g/litre.

     1.4.2. The fuel consumption values shall be calculated from the emissions of hydrocarbons, carbon monoxide, and carbon dioxide determined from the measurement results using the provisions defined in paragraph 6.6. of Annex 4a of Regulation No. 83 in force at the time of the approval of the vehicle.

     1.4.3. The fuel consumption, expressed in litres per 100 km (in the case of petrol, LPG, ethanol (E85) and diesel) or in m3 per 100 km (in the case of NG/biomethane) is calculated by means of the following formulae:
     (a) for vehicles with a positive ignition engine fuelled with petrol (E5):
     FC = (0.118/D) ∙ [(0.848 ∙ HC) + (0.429 ∙ CO) + (0.273 ∙ CO2)];
     (b) for vehicles with a positive ignition engine fuelled with LPG:
     FCnorm = (0.1212 / 0.538) · [(0.825 · HC) + (0.429 · CO) +  (0.273 · CO2)].
     If the composition of the fuel used for the test differs from the composition that is assumed for the calculation of the normalized consumption, on the manufacturer's request a correction factor cf may be applied, as follows:
     FCnorm = (0.1212 / 0.538) · (cf) · [(0.825 · HC) + (0.429 · CO) +  (0.273 · CO2)].
     The correction factor cf, which may be applied, is determined as follows:
     cf  =  0.825 + 0.0693 · nactual;
     where:
     nactual  =  the actual H/C ratio of the fuel used;
     (c) for vehicles with a positive ignition engine fuelled with NG/biomethane:
     FCnorm = (0.1336 / 0.654) · [(0.749 · HC) + (0.429 · CO) + (0.273 · CO2)];
     (d) for vehicles with a compression ignition engine fuelled with diesel  (B5):
     FC = (0.116/D) ∙ [(0.861 ∙ HC) + (0.429 ∙ CO) + (0.273 ∙ CO2)];
     (e) for vehicles with a positive ignition engine fuelled with ethanol (E85):
     FC = (0.1742/D) ∙ [(0.574 ∙ HC) + (0.429 ∙ CO) + (0.273 ∙ CO2)].

 In these formulae:
     FC = the fuel consumption in litres per 100 km (in the case of petrol, LPG, diesel                             ethanol or biodiesel) or in m3 per 100 km (in the case of natural gas);
     HC = the measured emission of hydrocarbons in g/km;
     CO = the measured emission of carbon monoxide in g/km;
     CO2 = the measured emission of carbon dioxide in g/km;
     D = the density of the test fuel.
     In the case of gaseous fuels this is the density at 15 °C

Annex 7

METHOD OF MEASURING THE ELECTRIC ENERGY CONSUMPTION
OF VEHICLES POWERED BY AN ELECTRIC POWER TRAIN ONLY

     1. TEST