Document ID: chunk:federal_register_of_legislation:F2023L00129:front:0:p28
Version: federal_register_of_legislation:F2023L00129
Segment Type: other
Provision Reference: 
Character Range: 77148–79951

fuels GR and G20 in the case of LNG, or on the reference fuels A and B in the case of LPG, as specified in Annex 5 to this Regulation. Fine-tuning of the fuelling system is allowed between the tests. This fine-tuning will consist of a recalibration of the fuelling database, without any alteration to either the basic control strategy or the basic structure of the database. If necessary the exchange of parts that are directly related to the amount of fuel flow such as injector nozzles is allowed.

              4.7.2.2. In the case of CNG, at the manufacturer's request, the engine may be tested on the reference fuels GR and G23, or on the reference fuels G25 and G23, in which case the type-approval is only valid for the H-range or the L-range of gases respectively.

4.7.2.3. On delivery to the customer the engine shall bear a label as specified in paragraph 4.12.8. below stating for which fuel range composition the engine has been calibrated.
              4.8. Requirements on fuel-specific type-approval in the case of engines fuelled with liquefied natural gas/liquefied biomethane (LNG)

              In case of liquefied natural gas/liquefied biomethane, a fuel specific type-approval may be granted subject to the requirements specified in paragraphs 4.8.1. to 4.8.2.

              4.8.1. Conditions for applying for a fuel-specific type approval in the case of engines fuelled with liquefied natural gas/liquefied biomethane (LNG).

              4.8.1.1. The manufacturer can only apply for a fuel specific type-approval in the case of the engine being calibrated for a specific LNG gas composition[7] resulting in a -shift factor not differing by more than 3 per cent from the -shift factor of the G20 fuel specified in Annex 5, and the ethane content of which does not exceed 1.5 per cent.

              4.8.1.2.  In all other cases the manufacturer shall apply for a universal fuel type approval according to the specifications of paragraph 4.6.3.2.

              4.8.2. Specific test requirements in the case of a fuel-specific type approval (LNG).

4.8.2.1. In the case of a dual-fuel engine family where the engines are calibrated for a specific LNG gas composition2 resulting in a -shift factor not differing by more than 3 per cent from the -shift factor of the G20 fuel specified in Annex 5, and the ethane content of which does not exceed 1.5 per cent, the parent engine shall only be tested on the G20 reference gas fuel, as specified in Annex
4.9. Exhaust emissions type approval of a member of a family
              4.9.1. With the exception of the case mentioned in paragraph 4.8.2., the type approval of a parent engine shall be extended to all family members, without further testing, for any fuel composition within the range for which the parent engine has