Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:16:p80
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 16 (pt 80/108)
Character Range: 1113964–1117074

contained in paragraph 2.4.6. of this annex, the existing fuel shall be drained prior to the fuel fill. The evaporative emission control system shall neither be abnormally purged nor abnormally loaded.
              2.6.1.2. REESSs charging
              Before the preconditioning test cycle, the REESSs shall be fully charged. At the request of the manufacturer, charging may be omitted before preconditioning. The REESSs shall not be charged again before official testing.
              2.6.1.3. Tyre pressures
              The tyre pressure of the driving wheels shall be set in accordance with paragraph 2.4.5. of this annex.
              2.6.1.4. Gaseous fuel vehicles
              Between the tests on the first gaseous reference fuel and the second gaseous reference fuel, for vehicles with positive ignition engines fuelled with LPG or NG/biomethane or so equipped that they can be fuelled with either petrol or LPG or NG/biomethane, the vehicle shall be preconditioned again before the test on the second reference fuel.
              2.6.2. Test cell
              2.6.2.1. Temperature
              During preconditioning, the test cell temperature shall be the same as defined for the Type 1 test (paragraph 2.2.2.1.1. of this annex).
              2.6.2.2. Background measurement
              In a test facility in which there may be possible contamination of a low particulate emitting vehicle test with residue from a previous test on a high particulate emitting vehicle, it is recommended, for the purpose of sampling equipment preconditioning, that a 120 km/h steady state drive cycle of 20 minutes duration be driven by a low particulate emitting vehicle. Longer and/or higher speed running is permissible for sampling equipment preconditioning if required. Dilution tunnel background measurements, if applicable, shall be taken after the tunnel preconditioning, and prior to any subsequent vehicle testing.
              2.6.3. Procedure
              2.6.3.1. The test vehicle shall be placed, either by being driven or pushed, on a dynamometer and operated through the applicable WLTCs. The vehicle need not be cold, and may be used to set the dynamometer load.
              2.6.3.2. The dynamometer load shall be set according to paragraphs 7. and 8. of Annex B4. In the case that a dynamometer in 2WD operation is used for testing, the road load setting shall be carried out on a dynamometer in 2WD operation, and in the case that a dynamometer in 4WD operation is used for testing the road load setting shall be carried out on a dynamometer in 4WD operation.
              2.6.4. Operating the vehicle
              2.6.4.1. The powertrain start procedure shall be initiated by means of the devices provided for this purpose according to the manufacturer's instructions.
              A non-vehicle initiated switching of mode of operation during the test shall not be permitted unless otherwise specified.
              2.6.4.1.1. If the initiation of the powertrain start procedure is not successful, e.g. the engine does not start as anticipated or the vehicle displays a start