Document ID: chunk:federal_register_of_legislation:F2024L00443:reg:55:p3
Version: federal_register_of_legislation:F2024L00443
Segment Type: reg
Provision Reference: reg 55 (pt 3/4)
Character Range: 209239–212170

2.5.2.6. In addition, settings incompatible with correct running of the engine shall not be adopted as measurement settings. In particular, when the engine is equipped with several carburettors all the carburettors shall have the same setting.
              2.6. Additional requirements for Hybrid Electric Vehicles
              The vehicles shall be tested with the fuel consuming engine running. The manufacturer shall provide a "service mode" that makes execution of this test possible.
               If necessary, the special procedure provided for in paragraph 5.1.6. to this Regulation shall be used.
3.  Sampling of gases
              3.1. The sampling probe shall be inserted into the exhaust pipe to a depth of at least 300 mm or into the pipe connecting the exhaust with the sampling bag and as close as possible to the exhaust.
              3.2. The concentration in CO (CCO) and CO2 (CCO2) shall be determined from the measuring instrument readings or recordings, by use of appropriate calibration curves.
              3.3. The corrected concentration for carbon monoxide regarding four-stroke engines is:
                      (per cent vol.)
              3.4. The concentration in CCO (see paragraph 3.2. of this annex) measured according to the formulae contained in paragraph 3.3. of this annex need not be corrected if the total of the concentrations measured (CCO + CCO2) is for four-stroke engines at least:
 (a) For petrol   15 per cent
 (b) For LPG   13.5 per cent
 (c) For NG/biomethane  11.5 per cent

Annex 6

Type 3 test
(Verifying emissions of crankcase gases)
              1. Introduction
               This annex describes the procedure for the Type 3 Test defined in paragraph 5.3.3. of this Regulation.
              2. General provisions
              2.1. The Type 3 test shall be carried out on a vehicle with positive- ignition engine, which has been, subjected to the Type 1 test, as specified in UN Regulation No. 154, and the Type 2 test, as applicable.
              2.2. The engines tested shall include leak-proof engines other than those so designed that even a slight leak may cause unacceptable operating faults (such as flat-twin engines).
              2.3. The road load coefficients to be used shall be those for vehicle low (VL). If VL does not exist, then the VH road load shall be used. In that case VH shall be defined in accordance with point 4.2.1.1.1. of Annex B4 to UN Regulation No. 154. In case the interpolation method is used VL and VH shall be specified in accordance with point 4.2.1.1.2. of Annex B4 to UN Regulation No. 154. Alternatively, the manufacturer may choose to use road loads that have been determined in accordance with the provisions of Appendix 7a or Appendix 7b to Annex 4a of the 07 series of amendments to UN Regulation No. 83 for a vehicle included in the interpolation family.

              3. Test conditions
              3.1. Idling shall