Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:6600:p1
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 6600 (pt 1/28)
Character Range: 730422–733208

6600   156.4  10.0      0.0       140.8

              For each possible gear i and each vehicle speed value of the cycle trace  (j as specified in paragraph 3.1 of this annex) and each engine speed value ni,j ≥ nmin of the full load power curve the available power shall be calculated from adjacent nk, Pavailable_k values of the full load power curve by linear interpolation.

              3.5. Determination of possible gears to be used
              The possible gears to be used shall be determined by the following conditions:
                  (a) The conditions of paragraph 3.3. of this annex are fulfilled, and
                  (b) For ngear > 2, if .
              The initial gear to be used for each second  of the cycle trace is the highest final possible gear, imax. When starting from standstill, only the first gear shall be used.
              The lowest final possible gear is imin.
              4. Additional requirements for corrections and/or modifications of gear use
              The initial gear selection shall be checked and modified in order to avoid too frequent gearshifts and to ensure driveability and practicality.
              An acceleration phase is a time period of more than 2 seconds with a vehicle speed ≥ 1.0 km/h and with strictly monotonic increase of vehicle speed. A deceleration phase is a time period of more than 2 seconds with a vehicle speed ≥ 1.0 km/h and with strictly monotonic decrease of vehicle speed. A constant speed phase is a time period of more than 2 seconds with a constant vehicle speed ≥ 1.0 km/h.
              The end of an acceleration/deceleration phase is determined by the last time sample in which the vehicle speed is higher/lower than the vehicle speed of the previous time sample. In this context the end of a deceleration phase could be the beginning of an acceleration phase. In this case the requirements for acceleration phases overrule the requirements for deceleration phases.
              Corrections and/or modifications shall be made according to the following requirements:
              The modification check described in paragraph 4.(a) of this annex shall be applied to the complete cycle trace twice prior to the application of paragraphs 4.(b) to 4.(f) of this annex.
                  (a) If a one step higher gear (n+1) is required for only 1 second and the gears before and after are the same (n) or one of them is one step lower (n – 1), gear (n + 1) shall be corrected to gear n.
                   Examples:
                  Gear sequence i - 1, i, i - 1 shall be replaced by:
                  i - 1, i - 1, i - 1;
                  Gear sequence i - 1, i, i - 2 shall be replaced by:
                  i - 1, i - 1, i - 2;
                  Gear sequence i - 2, i, i - 1 shall be