Document ID: chunk:federal_register_of_legislation:F2022C00213:front:0:p37
Version: federal_register_of_legislation:F2022C00213
Segment Type: other
Provision Reference: 
Character Range: 129542–132234

be in use.  If there is a manually controlled device for the engine intake air temperature, it shall be in the position prescribed by the manufacturer for the ambient temperature at which the test is performed.  In general, the auxiliary devices required for the normal operation of the vehicle shall be in use.

     1.3.2. If the radiator fan is temperature controlled, it shall be in the condition of normal operation on the vehicle.  The passenger compartment heating system shall be switched off, as shall any air conditioning system, but such systems compressor shall be functioning normally.

     1.3.3. If a super-charger is fitted, it shall be in the normal operating condition for the test conditions.

     1.3.4. All the lubricants shall be those recommended by the manufacturer of the vehicle and shall be specified in the test report.

     1.3.5. The tyres shall be of a type specified as original equipment by the vehicle manufacturer inflated to the pressure recommended for the test load and speeds. The pressures shall be indicated in the test report.

     1.4. Calculation of CO2 and fuel consumption values

     1.4.1. The mass emission of CO2, expressed in g/km, shall be calculated from the measurement results using the provisions defined in appendix 8 to Annex 4 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 appendix 8 to Annex 4 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 or diesel) or in m3 per 100 km (in the case of NG) is calculated by means of the following formulae:

      (a) for vehicles with a positive ignition engine fuelled with petrol:

       FC = (0.1154 / D) · [(0.866 · 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 normalised 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 ·