Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:6600:p9
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 6600 (pt 9/28)
Character Range: 748715–752418

4.(a) to 4.(f) inclusive of this annex shall be applied sequentially, scanning the complete cycle trace in each case. Since modifications to paragraphs 4.(a) to 4.(f) inclusive of this annex may create new gear use sequences, these new gear sequences shall be checked twice and modified if necessary.
                  (b) After the application of paragraph 4.(b) of this annex, a downshift by more than one gear could occur at the transition from a deceleration or constant speed phase to an acceleration phase.
                  In this case, the gear for the last sample of the deceleration or constant speed phase shall be replaced by gear 0 and the clutch shall be disengaged. If the "suppress gear 0 during downshifts" option according to paragraph 4.(f) of this annex is chosen, the gear of the following second (first second of the acceleration phase) shall be used instead of gear 0.
                  (c) In order to enable the assessment of the correctness of the calculation, the checksum of v*gear for v ≥ 1.0 km/h, rounded according to paragraph 6.1.8. of this Regulation to four places of decimal, shall be calculated and recorded.
              6. Calculation tools

              Examples of gear shift calculating tools can be found in the UN GTR No. 15 webpage on the UNECE website.16F[14]

              The following tools are provided:

                  (a) ACCESS based tool;

                  (b) Matlab code tool;

                  (c) .NET framework tool;

                  (d) Python based tool.

              These tools were validated by the comparison of calculation results between the ACCESS tool, the Matlab code, the .NET framework code and the Python based tool for 115 different vehicle configurations supplemented by additional calculations for 7 of them with additional options like "apply speed cap", "suppress downscaling", "choose other vehicle class cycle" and "choose individual nmin_drive values".

              The 115 vehicle configurations cover extreme technical designs for transmission and engines and all vehicle classes.

              All four tools deliver identical results with respect to gear use and clutch operation and although only the text in Annexes B1 and B2 is legally binding the tools have achieved a status that qualifies them as reference tools.

     Annex B3

     Specifications of reference fuels
              1. This annex provides information relating to the specification for the reference fuels to be used when conducting Type 1 tests.
              2. (Reserved)
              3. Technical data on liquid fuels for testing vehicles with positive-ignition engines
              3.1. Gasoline/Petrol (nominal 90 RON, E0)
              Table A3/1
              This table is only applicable for Level 1B;
              Gasoline/petrol (nominal 90 RON, E0)
Fuel property or substance name                                                       Unit       Standard             Test method
Minimum                                                                               Maximum
 Research octane number, RON                                                                      90.0                 92.0                  JIS K2280 a
 Motor octane number, MON                                                                         80                   82                    JIS K2280 a
 Density                                                                               g/cm³      0.720                0.734                 JIS K2249-1,2,3 a
 Vapour pressure                                                                       kPa        56                   60                    JIS K2258-1,2 a
 Distillation:
 —