Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:16:p85
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 16 (pt 85/108)
Character Range: 1128718–1131665

soaked for a minimum of 6 hours and a maximum of 36 hours with the engine compartment cover opened or closed. If not excluded by specific provisions for a particular vehicle, cooling may be accomplished by forced cooling down to the set point temperature. If cooling is accelerated by fans, the fans shall be placed so that the maximum cooling of the drive train, engine and exhaust after-treatment system is achieved in a homogeneous manner.
              2.8. Emission and fuel consumption test (Type 1 test)
              2.8.1. The test cell temperature at the start of the test shall be within ±3 °C of the set point of 23 °C. The engine oil temperature and coolant temperature, if any, shall be within ±2 °C of the set point of 23 °C.
              2.8.2. The test vehicle shall be pushed onto a dynamometer.
              2.8.2.1. The drive wheels of the vehicle shall be placed on the dynamometer without starting the engine.
              2.8.2.2. The drive-wheel tyre pressures shall be set in accordance with the provisions of paragraph 2.4.5. of this annex.
              2.8.2.3. The engine compartment cover shall be closed.
              2.8.2.4. An exhaust connecting tube shall be attached to the vehicle tailpipe(s) immediately before starting the engine.
              2.8.2.5. The tested vehicle shall be placed on the chassis dynamometer according to paragraphs 7.3.3. to 7.3.3.1.4. of Annex B4.
              2.8.3. Starting of the powertrain and driving
              2.8.3.1. The powertrain start procedure shall be initiated by means of the devices provided for this purpose according to the manufacturer's instructions.
              2.8.3.2. The vehicle shall be driven as described in paragraphs 2.6.4. to 2.6.8. inclusive of this annex over the applicable WLTC, as described in Annex B1.
              2.8.4. RCB data shall be measured for each phase of the WLTC as defined in Appendix 2 to this annex.
              2.8.5. Actual vehicle speed shall be sampled with a measurement frequency of 10 Hz and the drive trace indices described in paragraph 7. of Annex B7 shall be calculated and reported.
              2.8.6. This paragraph applies to Level 1A only
              Actual vehicle speed sampled with a measurement frequency of 10 Hz together with actual time shall be applied for corrections of CO2 results against the target speed and distance as defined in Annex B6b. In the case that the RMSSE value is less than 0.8 km/h, on request of the manufacturer this correction procedure may be omitted.
              2.9. Gaseous sampling
              Gaseous samples shall be collected in bags and the compounds analysed at the end of the test or a test phase, or the compounds may be analysed continuously and integrated over the cycle.
              2.9.1. The following steps shall be taken prior to each test:
              2.9.1.1. The purged, evacuated sample bags shall be connected to the dilute exhaust