Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:9:p16
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 9 (pt 16/37)
Character Range: 1821992–1824959

does not enable the vehicle to follow the reference test cycle, the mode for the test shall be selected according to the following conditions:
                  (a) If there is only one mode which allows the vehicle to follow the reference test cycle, this mode shall be selected;
                  (b) If several modes are capable of following the reference test cycle and none of those modes is a configurable start mode, the worst case mode for electric energy consumption of those modes shall be selected;
                  (c) If several modes are capable of following the reference test cycle and at least two of those modes are a configurable start mode, the worst case mode for electric energy consumption shall be selected from these configurable start modes.
              4.3. If there is no mode according to paragraph 4.1. and paragraph 4.2. of this appendix that enables the vehicle to follow the reference test cycle, the reference test cycle shall be modified according to paragraph 9. of Annex B1. The resulting test cycle shall be named as the applicable WLTP test cycle:
                  (a) If there is a predominant mode which allows the vehicle to follow the modified reference test cycle, this mode shall be selected;
                  (b) If there is no predominant mode but other modes which allow the vehicle to follow the modified reference test cycle, worst case mode for electric energy consumption of those modes shall be selected. In the case that at least two or more configurable start modes, the worst case mode for electric energy consumption shall be selected from these configurable start modes;
                  (c) If there is no mode which allows the vehicle to follow the modified reference test cycle, the mode or modes with the highest cycle energy demand shall be identified and the worst case mode for electric energy consumption shall be selected.

Figure A8.App6/3a and Figure A8.App6/3b
Selection of the driver-selectable mode for PEVs

Annex B8 - Appendix 7

Fuel consumption measurement of compressed hydrogen fuel cell hybrid vehicles
              1. General requirements

               Fuel consumption shall be measured using the gravimetric method in accordance with paragraph 2. of this appendix.

              At the request of the manufacturer and with approval of the responsible authority, fuel consumption may be measured using either the pressure method or the flow method. In this case, the manufacturer shall provide technical evidence that the method yields equivalent results. The pressure and flow methods are described in ISO 23828.

              2. Gravimetric method

              Fuel consumption shall be calculated by measuring the mass of the fuel tank before and after the test.

              2.1. Equipment and setting

              2.1.1. An example of the instrumentation is shown in Figure A8.App7/1. One or more off-vehicle tanks shall be used to measure the fuel consumption.