Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:1714:p12
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 1714 (pt 12/15)
Character Range: 720641–723820

if all of the following conditions are fulfilled:
                     (1)  The vehicle family is homologated to tow a trailer;
                     (2) (n/v)1 × (vmax / n95_high) > 6.74;
                     (3) (n/v)2 × (vmax / n95_high) > 3.85;
                     (4) The vehicle, having a mass mt as defined in the equation below, is able to pull away from standstill within 4 seconds, on an uphill gradient of at least 12 per cent, on five separate occasions within a period of 5 minutes.
                  mt = mr0 + 25 kg + (MC – mr0 – 25 kg) × 0.28
                     (factor 0.28 in the above equation shall be used for category 2 vehicles with a gross vehicle mass up to 3.5 tons and shall be replaced by factor 0.15 in the case of category 1 vehicles),
                  where:
                     vmax is the maximum vehicle speed as specified in paragraph 2. (i) of this annex. Only the vmax value resulting from the intersection of the required road load power curve and the available power curve of the relevant gear shall be used for the conditions in (2) and (3) above. A vmax value resulting from a limitation of the engine speed which prevents this intersection of curves shall not be used;
                     (n/v)(ngvmax) is the ratio obtained by dividing the engine speed n by the vehicle speed v for gear ngvmax, min-1/(km/h);
                  mr0 is the mass in running order, kg;
                     MC is the technically permissible maximum laden mass of the combination (see paragraph 3.2.27. of this Regulation), kg.
                  In this case, gear 1 shall not be used when driving the cycle on a chassis dynamometer and the gears shall be renumbered starting with the second gear as gear 1.
                  (k) Definition of nmin_drive
                  nmin_drive is the minimum engine speed when the vehicle is in motion, min-1;
                  (1)  For ngear = 1, nmin_drive = nidle,
                  (2)  For ngear = 2,
                         (i)  for transitions from first to second gear:
                      nmin_drive = 1.15 ×nidle,
                         (ii)  for decelerations to standstill:
                       nmin_drive = nidle,
                         (iii)  for all other driving conditions:
                      nmin_drive = 0.9 × nidle.
                     (3)  For ngear > 2, nmin_drive shall be determined by:
                      nmin_drive = nidle + 0.125 × (nrated -nidle).
                     This value shall be referred to as nmin_drive_set.
                  nmin_drive_set shall be rounded according to paragraph 6.1.8. of this Regulation to the nearest integer.
                  Values higher than nmin_drive_set may be used for ngear > 2 if requested by the manufacturer. In this case, the manufacturer may specify one value for acceleration/constant speed phases (nmin_drive_up) and a different value for deceleration phases (nmin_drive_down).
                  Samples which have acceleration values ≥ -0.1389 m/s² shall belong to the acceleration/constant speed phases. This phase specification shall only be used for the determination of the initial gear according to paragraph 3.5.