Document ID: chunk:federal_register_of_legislation:F2024C00356:front:0:p27
Version: federal_register_of_legislation:F2024C00356
Segment Type: other
Provision Reference: 
Character Range: 108893–112054

shall assign a series number to the extension and inform thereof the other Contracting Parties applying this Regulation by means of a communication form conforming to the model in Annex 2 to this Regulation.
  7.  Extensions to type approvals
7.1.  Extensions for tailpipe emissions (Type I, Type II and Type VI tests)
              7.1.1.  Vehicles with different reference masses
              7.1.1.1. The type approval shall be extended only to vehicles with a reference mass requiring the use of the next two higher equivalent inertia or any lower equivalent inertia.
              7.1.1.2. For category N vehicles, the approval shall be extended only to vehicles with a lower reference mass, if the emissions of the vehicle already approved are within the limits prescribed for the vehicle for which extension of the approval is requested.
              7.1.2.  Vehicles with different overall transmission ratios
              7.1.2.1. The type approval shall be extended to vehicles with different transmission ratios only under certain conditions.
              7.1.2.2. To determine whether type approval can be extended, for each of the transmission ratios used in the Type I and Type VI tests, the proportion,
                E = |(V2 − V1)|/V1
                shall be determined where, at an engine speed of 1,000 min-1, V1 is the speed of the type of vehicle approved and V2 is the speed of the vehicle type for which extension of the approval is requested.
              7.1.2.3. If, for each transmission ratio, E ≤ 8 per cent, the extension shall be granted without repeating the Type I and Type VI tests.
              7.1.2.4. If, for at least one transmission ratio, E > 8 per cent, and if, for each gear ratio, E ≤ 13 per cent, the Type I and Type VI tests shall be repeated. The tests may be performed in a laboratory chosen by the manufacturer subject to the approval of the Technical Service. The report of the tests shall be sent to the Technical Service responsible for the type approval tests.
              7.1.3.  Vehicles with different reference masses and transmission ratios
                The type approval shall be extended to vehicles with different reference masses and transmission ratios, provided that all the conditions prescribed in paragraphs 7.1.1. and 7.1.2. are fulfilled.
              7.1.4.  Vehicles with periodically regenerating systems
                The type approval of a vehicle type equipped with a periodically regenerating system shall be extended to other vehicles with periodically regenerating systems, whose parameters described below are identical, or within the stated tolerances. The extension shall only relate to measurements specific to the defined periodically regenerating system.
              7.1.4.1. Identical parameters for extending approval are:
                   (a) Engine;
                   (b) Combustion process;
                   (c) Periodically regenerating system (i.e. catalyst, particulate trap);
                   (d) Construction (i.e. type of enclosure, type of precious metal, type of substrate, cell density);
                   (e) Type and working principle;