Document ID: chunk:federal_register_of_legislation:F2024L00447:reg:1:p4
Version: federal_register_of_legislation:F2024L00447
Segment Type: reg
Provision Reference: reg 1 (pt 4/13)
Character Range: 59598–62549

for cold start PEMS trip

              Before RDE testing, the vehicle shall be preconditioned in the following way:

              The vehicle shall be driven, preferably on the same route as the planned RDE testing, or for at least 10 min per type of operation (e.g. urban, rural, motorway) or 30 minutes with a minimum average speed of 30 km/h. The validation test in the laboratory, as in paragraph 8.4., also counts as preconditioning. The vehicle shall subsequently be parked with doors and bonnet closed and kept in engine-off status within moderate or extended altitude and temperatures, in accordance with paragraph 8.1., for between 6 and 72 hours. Exposure to extreme atmospheric conditions (such as heavy snowfall, storm, hail) and excessive amounts of dust or smoke should be avoided.

              Before the test start, the vehicle and equipment shall be checked for damages and the presence of warning signals that may suggest malfunctioning. In the case of a malfunction the source of the malfunctioning shall be identified and corrected or the vehicle shall be rejected.

              8.3.3. Auxiliary devices

              The air conditioning system or other auxiliary devices shall be operated in a way which corresponds to their typically intended use during real driving on the road. Any use shall be documented. The vehicle windows shall be closed when the air conditioning or heating are used.

              8.3.4. Vehicles equipped with periodically regenerating systems

              8.3.4.1. All results shall be corrected with the Ki factors or with the Ki offsets developed by the procedures in Appendix 1 to Annex B6 of UN Regulation No. 154 on WLTP for type-approval of a vehicle type with a periodically regenerating system. The Ki factor or the Ki offset shall be applied to the final results after evaluation in accordance with Annex 11.

              8.3.4.2.  If the final emissions as calculated in Annex 11 are above the applicable emission limits, then the occurrence of regeneration shall be verified. The verification of a regeneration may be based on expert judgement through cross-correlation of several of the following signals, which may include exhaust temperature, PN, CO2, O2 measurements in combination with vehicle speed and acceleration. If the vehicle has a regeneration recognition feature, it shall be used to determine the occurrence of regeneration. The manufacturer may advise how to recognise whether regeneration has taken place in case such a signal is not available.

              8.3.4.3. If regeneration occurred during the test, the final emission result without the application of either the Ki -factor or the Ki offset shall be checked against applicable emission limits. If the final emissions are above the emission limits, then the test shall be invalid and repeated once. The completion of the regeneration and stabilisation, through approximately 1 hour of driving, shall