Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p4
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 4/150)
Character Range: 721917–724837

15 minutes after engine start. In accordance with paragraph 4.5. the period elapsed to reach the coolant temperature of 343 K (70 °C) shall be operated under urban driving conditions.
Artificial warming up of the emission control systems prior to the test is prohibited.
              4.5.5 The following distribution of the characteristic trip values from the WHDC database may serve as additional guidance for the evaluation of the trip:
              (a) Accelerating: 26.9 per cent of the time;
              (b) Decelerating: 22.6 per cent of the time;
              (c) Cruising: 38.1 per cent of the time;
              (d) Stop (vehicle speed=0): 12.4 per cent of the time.
              4.6. Operational requirements
              4.6.1. The trip shall be selected in such a way that the testing is uninterrupted and the data continuously sampled to reach the minimum test duration defined in paragraph 4.6.5.
              4.6.2. Emissions and other data sampling shall start prior to starting the engine. Cold start emissions shall be included in the emissions evaluation, in accordance with paragraph A.1.2.6. of Appendix 1 to this annex.
              4.6.3. It shall not be permitted to combine data of different trips or to modify or remove data from a trip.
              4.6.4. If the engine stalls, it may be restarted, but the sampling shall not be interrupted.
              4.6.5. The test duration shall be long enough to complete between four and eight times the work performed during the WHTC or produce between four and eight times the CO2 reference mass in kg/cycle from the WHTC as applicable.
              4.6.6. The electrical power to the PEMS system shall be supplied by an external power supply unit, and not from a source that draws its energy either directly or indirectly from the engine under test.
4.6.6.1. As an alternative the electrical power to the PEMS system may be supplied by the internal electrical system of the vehicle as long as the power demand for the test equipment does not increase the output from the engine by more than 1 per cent of its maximum power and measures are taken to prevent excessive discharge of the battery when the engine is not running or idling.
4.6.6.2. In case of a dispute the results of measurements performed with a PEMS system powered by an external power supply shall prevail over the results acquired according to the alternative method under 4.6.6.1.
              4.6.7. The installation of the PEMS equipment shall not influence the vehicle emissions and/or performance.
              4.6.8. It is recommended to operate the vehicles under normal daytime traffic conditions.
              4.6.9. If the Type Approval Authority is not satisfied with the data consistency check results according to paragraph A.1.3.2. of Appendix 1 to this annex, the Type Approval Authority may consider the test to be void.
              4.6.10. If the