Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:6600:p3
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 6600 (pt 3/28)
Character Range: 735460–738182

the acceleration phase (second three), so that the correction results in the following gear sequence
                  3 3 2 2 2 2 2
                  Furthermore, if the gear in the first second of an acceleration phase is the same as the gear in the previous second and the gear in the following seconds is one step higher, the gear in the 2nd second of the acceleration phase shall be replaced by the gear used in the first second of the acceleration phase.
                  Example:
                  For a speed trace sequence
                  30.9 25.5 21.4 20.2 22.9 26.6 30.2 km/h
                  with an initial gear use of
                  3 3 2 2 3 3 3,
                  the gear in the fifth second (the 2nd second of the acceleration phase) shall be corrected to a one step lower gear in order to ensure the use of a gear within the acceleration phase for at least two seconds, so that the correction results in the following gear sequence
                  3 3 2 2 2 3 3
                  Gears shall not be skipped during upshifts within acceleration phases.
                  However, an upshift by two gears is permitted at the transition from an acceleration phase to a constant speed phase if the duration of the constant speed phase exceeds 5 seconds.
                  (b) If a downshift is required during an acceleration phase or at the beginning of the acceleration phase, the gear required during this downshift shall be noted (iDS). The starting point of a correction procedure is defined by either the last previous second when iDS was identified or by the starting point of the acceleration phase if all time samples before have gears > iDS. The highest gear of the time samples before the downshift determines the reference gear iref for the downshift. A downshift where iDS = iref – 1 is referred to as a one step downshift, a downshift where iDS = iref – 2 is referred to as a two step downshift, a downshift where iDS = iref – 3 is referred to as a three step downshift. The following check shall then be applied.
                  (i) One step downshifts
                  Working forward from the starting point of the correction procedure to the end of the acceleration phase, the latest occurrence of a 10 second window containing iDS for either 2 or more consecutive seconds, or 2 or more individual seconds, shall be identified. The last usage of iDS in this window defines the end point of the correction procedure. Between the start and end of the correction period, all requirements for gears greater than iDS shall be corrected to a requirement of iDS.
                  From the end of the correction period (in case of 10 second windows containing iDS for either 2 or more