Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:13:p26
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 13 (pt 26/27)
Character Range: 709666–712645

be demonstrated by testing vehicles on the road operated over their normal driving patterns, conditions and payloads. The in-service conformity test shall be representative for vehicles operated on their real driving routes, with their normal payload and with the usual professional driver of the vehicle. When the vehicle is operated by a driver other than the usual professional driver of the particular vehicle, this alternative driver shall be skilled and trained to operate vehicles of the category subject to be tested.
              2.2. If the normal in-service conditions of a particular vehicle are considered to be incompatible with the proper execution of the tests, the manufacturer or the Type Approval Authority may request that alternative driving routes and payloads are used.
              2.3. The manufacturer shall demonstrate to the Type Approval Authority that the chosen vehicle, driving patterns and conditions are representative for the engine family. The requirements as specified in paragraph 4.5. shall be used to determine whether the driving patterns are acceptable for in-service conformity testing.
              2.4. The manufacturer shall report the schedule and the sampling plan for conformity testing at the time of the initial type approval of a new engine family.
              2.5. Vehicles without a communication interface which permits the collection of the necessary ECU data as specified in paragraphs 9.4.2.1. and 9.4.2.2. of this Regulation, with missing data or with a non-standard data protocol shall be considered as non compliant.
              2.6. Vehicles where the collection of ECU data influences the vehicle emissions or performance shall be considered as non compliant.
3. Engine or vehicle selection
              3.1. After the granting of type approval for an engine family the manufacturer shall perform in-service testing on this engine family within 18 months from first registration of a vehicle fitted with an engine from that family. In case of multistage type approval first registration means first registration of a completed vehicle.
               The testing shall be repeated at least every two years for each engine family periodically on vehicles over their useful life period as specified in paragraph 5.4. of this Regulation.
              At the request of the manufacturer the testing may stop five years after the end of production.
              3.1.1. With a minimum sample size of three engines the sampling procedure shall be set so that the probability of a lot passing a test with 20 per cent of the vehicles or engines defective is 0.90 (producer's risk = 10 per cent) while the probability of a lot being accepted with 60 per cent of the vehicles or engines defective is 0.10 (consumer's risk = 10 per cent).
              3.1.2. The test statistic quantifying the cumulative number of nonconforming tests at the n‑th test shall be determined for the sample.
              3.1.3. The pass