Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:99:p25
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 99 (pt 25/39)
Character Range: 1223122–1226524

fuel consumed shall be used to determine, according to section A.6.4. of this annex, the molar hydrogen ratio and the mass fractions of the fuel mix in the test.

              The total fuel mass shall be determined according to equations 23 and 24.

               (23)

               (24)

              where:

              mfuel,corr is the corrected fuel mass of both fuels, g/test

              mfuel  total fuel mass of both fuels, g/test

              mTHC  mass of total hydrocarbon emissions in the exhaust gas, g/test

              mCO  mass of carbon monoxide emissions in the exhaust gas, g/test

              mCO2,fuel CO2 mass emission coming from the fuel, g/test

              wGAM  sulphur content of the fuels, per cent mass

              wDEL  nitrogen content of the fuels, per cent mass

              wEPS  oxygen content of the fuels, per cent mass

              α  molar hydrogen ratio of the fuels (H/C)

              AC   is the Atomic mass of Carbon: 12,011 g/mol

              AH  is the Atomic mass of Hydrogen: 1,0079 g/mol

              MCO  is the Molecular mass of Carbon monoxide: 28,011 g/mol

              MCO2  is the Molecular mass of Carbon dioxide : 44,01 g/mol

              The CO2 emission resulting from urea shall be calculated with equation 25:

                (25)

              where:

              mCO2,urea CO2 mass emission resulting from urea, g/test

              curea  urea concentration, per cent

              murea  total urea mass consumption, g/test

              MCO(NH2)2 is the Molecular mass of urea: 60,056 g/mol

              Then the total CO2 emission shall be calculated with equation 26:

               (26)

              The brake specific CO2 emissions, eCO2 shall then be calculated according to section 3.3. of Annex 12.

              11. Documentation requirements

              11.1. Documentation for installing in a vehicle a type approved HDDF engine

              The manufacturer of a dual-fuel engine type-approved as separate technical unit shall include in the installation documents of its engine system the appropriate requirements that will ensure that the vehicle, when used on the road or elsewhere as appropriate, will comply with the requirements of this annex. This documentation shall include but is not limited to:

                  (a) The detailed technical requirements, including the provisions ensuring the compatibility with the OBD system of the engine system;

              (b) The verification procedure to be completed.

              The existence and the adequacy of such installation requirements may be checked during the approval process of the engine system.

              11.1.1. In the case when the vehicle manufacturer who applies for approval of the installation of the engine system on the vehicle is the same manufacturer who received the type-approval of the dual-fuel engine as a separate technical unit, the documentation specified in paragraph 11.2. is not required.

              12. Appendices

              Appendix 1 Types of HDDF engines and vehicles - illustration of the definitions and requirements

              Appendix 2 Activation and deactivation mechanisms of the counter(s), warning system, operability restriction, service mode in case of dual fuel engines and vehicles- Description and illustrations

              Appendix 3 HDDF