Document ID: chunk:federal_register_of_legislation:F2023L00129:front:0:p43
Version: federal_register_of_legislation:F2023L00129
Segment Type: other
Provision Reference: 
Character Range: 118393–121242

that the engine meets the limit values with all relevant fuels (for example fuels 1, 2 and, if applicable, the third fuel in the case of natural gas engines, and fuels A and B in the case of LPG engines).

              8.3.3.6. Tests for conformity of production of a gas fuelled engine laid out for operation on one specific fuel composition shall be performed on the fuel for which the engine has been calibrated.

              8.4. On-Board Diagnostics (OBD)

              8.4.1. When the Type Approval Authority determines that the quality of production seems unsatisfactory, it may request a verification of the conformity of production of the OBD system. Such verification shall be carried out in accordance with the following:

              An engine shall be randomly taken from series production and subjected to the tests described in Annex 9B and in the case of dual-fuel engines to the additional tests required by paragraph 7. of Annex 15 to this Regulation. The tests may be carried out on an engine that has been run-in up to a maximum of 125 hours.

              8.4.2. The production is deemed to conform if this engine meets the requirements of the tests described in Annex 9B to this Regulation and in the case of dual-fuel engines to the additional tests required by paragraph 7. of Annex 15 to this Regulation.

              8.4.3. If the engine taken from the series production does not satisfy the requirements of paragraph 8.4.1. above, a further random sample of four engines shall be taken from the series production and subjected to the tests described in Annex 9B and in the case of dual-fuel engines to the additional tests required by paragraph 7. of Annex 15 to this Regulation. The tests may be carried out on engines that have been run-in, up to a maximum of 125 hours.

              8.4.4. The production is deemed to conform if at least three engines out of the further random sample of four engines meet the requirements of the tests described in Annex 9B.

              8.5. Electronic control unit (ECU) information required for in-service testing

              8.5.1. The availability of the data stream information requested in paragraph 9.4.2.1. according to the requirements of paragraph 9.4.2.2. shall be demonstrated by using an external OBD scan-tool as described in Annex 9B.

              8.5.2. In the case where this information cannot be retrieved in a proper manner while the scan-tool is working properly according to Annex 9B, the engine shall be considered as non-compliant.

              8.5.3. The conformity of the ECU torque signal with the requirements of paragraphs 9.4.2.2. and 9.4.2.3. shall be demonstrated by performing the WHSC test according to Annex 4.

              8.5.4. In the case where the test equipment does not match the requirements specified in Regulation No.