Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:6600:p23
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 6600 (pt 23/28)
Character Range: 856070–859140

components with the production series, (e.g. side mirrors shall be same position as during normal vehicle operation, body gaps shall not be sealed), or, if the vehicle is different from the production vehicle, a full description shall be recorded.
4.2.1.1. Requirements for test vehicle selection
              4.2.1.1.1. Without using the interpolation method
              A test vehicle (vehicle H) with the combination of road load relevant characteristics (i.e. mass, aerodynamic drag and tyre rolling resistance) producing the highest cycle energy demand shall be selected from the family (see paragraphs 6.3.2. and 6.3.3. of this Regulation).
              If the aerodynamic influence of the different wheels within one interpolation family is not known, the selection shall be based on the highest expected aerodynamic drag. As a guideline, the highest aerodynamic drag may be expected for wheels with (a) the largest width, (b) the largest diameter, and (c) the most open structure design (in that order of importance).
              The wheel selection shall be performed additional to the requirement of the highest cycle energy demand.
              4.2.1.1.2. Using an interpolation method
              At the request of the manufacturer, an interpolation method may be applied.
              In this case, two test vehicles shall be selected from the family complying with the respective family requirement.
              Test vehicle H shall be the vehicle producing the higher, and preferably highest, cycle energy demand of that selection, test vehicle L the one producing the lower, and preferably lowest, cycle energy demand of that selection.
              All items of optional equipment and/or body shapes that are chosen not to be considered when applying the interpolation method shall be identical for both test vehicles H and L such that these items of optional equipment produce the highest combination of the cycle energy demand due to their road load relevant characteristics (i.e. mass, aerodynamic drag and tyre rolling resistance).
              In the case where individual vehicles can be supplied with a complete set of standard wheels and tyres and in addition a complete set of snow tyres (marked with 3 Peaked Mountain and Snowflake – 3PMS) with or without wheels, the additional wheels/tyres shall not be considered as optional equipment.
              4.2.1.1.2.1. The following requirements between vehicles H and L shall be fulfilled for the road load relevant characteristics:

              (a) To allow extrapolating road load coefficients:

                     (i) If f0_ind is below f*0_L or above f0_H as defined in paragraph 3.2.3.2.2.4. of Annex B7 while performing the calculation in paragraph 3.2.3.2.2.4. of Annex B7, the following minimum differences between H and L are required:

                     Rolling resistance of at least 1.0 kg/tonne and a mass of at least 30 kg; in case of RR between 0 and 1.0, the minimum of the mass difference is replaced with 100 kg instead of 30 kg;

                     (ii)