Document ID: chunk:federal_register_of_legislation:F2024L00446:front:0:p29
Version: federal_register_of_legislation:F2024L00446
Segment Type: other
Provision Reference: 
Character Range: 87574–90947

in Annexes B6 and B8;

              (g) The methods of calculation as described in Annexes B7 and B8.

              6.3.2. Interpolation family

              6.3.2.1. Interpolation family for pure ICE vehicles

              6.3.2.1.1. Vehicles may be part of the same interpolation family in any of the following cases including combinations of these cases:

                  (a) They belong to different vehicle classes as described in paragraph 2. of Annex B1;

                  (b) They have different levels of downscaling as described in paragraph 8. of Annex B1;

                  (c) They have different capped speeds as described in paragraph 9. of Annex B1.

              6.3.2.1.2. Only vehicles that are identical with respect to the following vehicle/powertrain/transmission characteristics may be part of the same interpolation family:

                  (a) Type of internal combustion engine: fuel type (or types in the case of flex-fuel or bi-fuel vehicles), combustion process, engine capacity, full-load characteristics, engine technology, and charging system, and also other engine subsystems or characteristics that have a non-negligible influence on CO2 emission under WLTP conditions;

                  (b) Operation strategy of all CO2 emission influencing components within the powertrain;

                  (c) Transmission type (e.g. manual, automatic, CVT) and transmission model (e.g. torque rating, number of gears, number of clutches, etc.);

                  (d) n/v ratios (engine rotational speed divided by vehicle speed). This requirement shall be considered fulfilled if, for all transmission ratios concerned, the difference with respect to n/v ratios of the most commonly installed transmission type is within 8 per cent;

                  (e) Number of powered axles.

              6.3.2.1.3. If an alternative parameter such as a higher nmin_drive, as specified in paragraph 2.(k) of Annex B2, or ASM, as defined in paragraph 3.4. of Annex B2 is used, this parameter shall be the same within an interpolation family.

              6.3.2.2. Interpolation family for NOVC-HEVs and OVC-HEVs

              In addition to the requirements of paragraph 6.3.2.1., only OVC-HEVs and NOVC-HEVs that are identical with respect to the following characteristics may be part of the same interpolation family:

                  (a) Type and number of electric machines: construction type (asynchronous/ synchronous, etc.), type of coolant (air, liquid) and any other characteristics having a non-negligible influence on CO2 emission and electric energy consumption under WLTP conditions;

                  (b) Type of traction REESS (type of cell, capacity, nominal voltage, nominal power, type of coolant (air, liquid));

                  (c) Type of electric energy converter between the electric machine and traction REESS, between the traction REESS and low voltage power supply and between the recharge-plug-in and traction REESS, and any other characteristics having a non-negligible influence on CO2 emission and electric energy consumption under WLTP conditions. At the request of the manufacturer and with the approval of the approval authority, electric energy converters between recharge-plug-in and traction REESS with lower recharge losses may be included in the family;

                  (d) The difference between