Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:13:p18
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 13 (pt 18/27)
Character Range: 684137–687935

Notes:
1 Inerts (different from N2) + C2+ C2+
2 Value to be determined at 293.2 K (20 °C) and 101.3 kPa.
Reference fuel G25
Composition:
Methane                                                                         % mole      86     84      88
Balance1                                                                        % mole      —      —       1            ISO 6974
N2                                                                              % mole      14     12      16
Sulphur content                                                                 mg/m3 2     —      —       10           ISO 6326-5

Notes:
    1 Inerts (different from N2) + C2+ C2+
    2 Value to be determined at 293.2 K (20 °C) and 101.3 kPa.
Reference fuel G20
Composition:
Methane                                                                         % mole      100    99      100          ISO 6974
Balance (1)                                                                     % mole      —      —       1            ISO 6974
N2                                                                              % mole                                  ISO 6974
Sulphur content                                                                 mg/m3 (2)   —      —       10           ISO 6326-5
Wobbe Index (net)                                                               MJ/m3 (3)   48.2    47.2   49.2
(1) Inerts (different from N2) + C2 + C2+.
(2) Value to be determined at 293,2 K (20 °C) and 101,3 kPa.
(3) Value to be determined at 273,2 K (0 °C) and 101,3 kPa.

Annex 6 Emissions data required at type approval for roadworthiness purposes

Measuring carbon monoxide emissions at idling speeds
1. Introduction
              1.1. This annex sets out the procedure for measuring carbon monoxide emissions at idling speeds (normal and high) for positive ignition engines installed in vehicles of category M1 with a technically permissible maximum laden mass not exceeding 7.5 tonnes, as well as in vehicles of categories M2 and N1.
1.2. This annex does not apply to dual-fuel engines and vehicles.
2. General requirements
              2.1. The general requirements shall be those set out in paragraph 5.3.7. of Regulation No. 83, with the exceptions set out in paragraphs 2.2., 2.3. and 2.4.
              2.2. The atomic ratios set out in paragraph 5.3.7.3. of Regulation No. 83 shall be understood as follows:
     Hcv =  Atomic ratio of hydrogen to carbon  –                for petrol (E10) 1.93
                                                –                for LPG 2.525
                                                –                for NG/biomethane 4.0
                                                –                for ethanol (E85) 2.74
     Ocv =  Atomic ratio of oxygen to carbon    –                for petrol (E10) 0.032
                                                –                for LPG 0.0
                                                –                for NG/biomethane 0.0
                                                –                for ethanol (E85) 0.385

              2.3. The table in paragraph 1.4.3. of Annex 2A (Table 6) shall be completed on the basis of the requirements set out in paragraphs 2.2. and 2.4. of this annex.
              2.4. The manufacturer shall confirm the accuracy of the Lambda value recorded at the time of type approval in paragraph 2.1. of this annex as being representative of typical production vehicles within 24 months of the date of the granting of type approval. An assessment shall be made on the basis of surveys and studies of production vehicles.
3. Technical requirements
              3.1. The technical requirements shall be those set out in Annex 5 to Regulation No. 83, with the exception set out in paragraph 3.2.