Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:9:p32
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 9 (pt 32/37)
Character Range: 1867203–1870162

vehicle may be steam-cleaned before the test;
                  (c) In the case of use of the gasoline canister load option (paragraph 6.5.5.3. of this annex) the fuel tank of the vehicle shall be equipped with a temperature sensor to enable the temperature to be measured at the mid-point of the fuel in the fuel tank when filled to 40 per cent of its capacity;
                  (d) Additional fittings, adapters of devices may be fitted to the fuel system in order to allow a complete draining of the fuel tank. For this purpose it is not necessary to modify the shell of the tank;
                  (e) The manufacturer may propose a test method in order to take into account the loss of hydrocarbons by evaporation coming only from the fuel system of the vehicle.
              6.1.2. The vehicle is taken into the test area where the ambient temperature is between 20 and 30 °C.
              6.2. Mode selections and gear shift prescriptions
              6.2.1. For vehicles with manual shift transmissions, the gear shift prescriptions specified in Annex B2 shall apply.
              6.2.2. In the case of pure ICE vehicles, the mode shall be selected according to Annex B6.
              6.2.3. In the case of NOVC-HEVs and OVC-HEVs, the mode shall be selected according to Appendix 6 to Annex B8.
              6.2.4. Upon request of the responsible authority, the selected mode may be different from that described in paragraphs 6.2.2. and 6.2.3. of this annex.
              6.3. Test conditions
              The tests included in this annex shall be performed using the test conditions specific to interpolation family vehicle H with the highest cycle energy demand of all the interpolation families included in the evaporative emission family being considered.
              Otherwise, at the request of the responsible authority, any cycle energy representative of a vehicle in the family may be used for the test.
              6.4. Flow of the test procedure
              The test procedure for non-sealed and sealed tank systems shall be followed according to the flow chart described in Figure C3/4.
              The sealed fuel tank systems shall be tested with one of 2 options. One option is to test the vehicle with one continuous procedure. Another option, called the 'stand-alone test procedure', is to test the vehicle with two separate procedures which will allow repeating the dynamometer test and the diurnal tests without repeating the tank depressurisation puff loss overflow test and the depressurisation puff loss measurement.

Figure C3/4
Test procedure flow charts

              6.5. Continuous test procedure for non-sealed fuel tank systems
              6.5.1. Fuel drain and refill
              The fuel tank of the vehicle shall be emptied. This shall be done so as not to abnormally purge or abnormally load the evaporative control devices fitted to the vehicle. Removal of the fuel cap is normally sufficient