Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:4:p26
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 4 (pt 26/42)
Character Range: 74949–77899

engine family and with regard to the level of the emission of gaseous pollutants by its approved gas engine or engine family shall be submitted by the vehicle manufacturer or a duly accredited representative.

       (1) OJ L 42, 23.2.1970, p. 1. Directive as last amended by Commission Directive 2004/104/EC (OJ L 337, 13.11.2004, p. 13).

              3.3.2.                        It shall be accompanied by the undermentioned documents in triplicate and the following particulars:

3.3.2.1.                    a description of the vehicle type and of engine-related vehicle parts comprising the particulars referred to     in Annex II, as applicable, and a copy of the EC Type-Approval Certificate (Annex VI) for the engine or engine family, if applicable, as a separate technical unit which is installed in the vehicle type, along  with   the documentation required in application of Article 3 of Directive 70/156/EEC.

4.                                 EC TYPE-APPROVAL

4.1.                            Granting of a universal fuel EC type-approval

              A universal fuel EC type-approval is granted subject to the following requirements.

4.1.1.                        In the case of diesel fuel the parent engine meets the requirements of this Directive on the reference fuel specified in Annex IV.

              4.1.2.                        In the case of natural gas the parent engine should demonstrate its capability to adapt to any  fuel  composition that may occur across the market. In the case of natural gas there are generally two types of   fuel, high calorific fuel (H-gas) and low calorific fuel (L-gas), but with a significant spread within both ranges; they differ significantly in their energy content expressed by the Wobbe Index and in their λ-shift factor (Sλ). The formulae for the calculation of the Wobbe index and Sλ are given in Sections 2.27 and 2.28. Natural gases with a λ-shift factor between 0,89 and 1,08 (0,89 ≤ Sλ ≤ 1,08) are considered to belong to H-range, while natural gases with a λ-shift factor between 1,08 and 1,19 (1,08 ≤ Sλ ≤ 1,19) are considered to belong to L-range. The composition of the reference fuels reflects the extreme variations of Sλ.

              The parent engine shall meet the requirements of this Directive on the reference fuels GR (fuel 1) and G25 (fuel 2), as specified in Annex IV, without any readjustment to the fuelling between the two tests. However, one adaptation run over one ETC cycle without measurement is permitted after the change of the fuel. Before testing, the parent engine shall be run-in using the procedure given in paragraph 3 of Appendix 2 to Annex III.

4.1.2.1.                    On the manufacturer's request the engine may be tested on a third fuel (fuel 3) if the λ-shift factor (Sλ) lies between 0,89 (i.e. the lower range of GR) and 1,19 (i.e. the upper range of G25) for example when fuel 3 is a market