Document ID: chunk:federal_register_of_legislation:F2024L00446:front:0:p32
Version: federal_register_of_legislation:F2024L00446
Segment Type: other
Provision Reference: 
Character Range: 96666–99850

as defined in paragraph 2.4. of Annex 1 to the Consolidated Resolution on the Construction of Vehicles (R.E.3.).

              Only vehicles which are identical with respect to the following characteristics may be part of the same road load matrix family:

              (a) Transmission type (e.g. manual, automatic, CVT);

              (b) Number of powered axles.

              6.3.5. Periodically regenerating systems (Ki) family

              Only vehicles that are identical with respect to the following characteristics may be part of the same periodically regenerating systems family:

              (a) Type of internal combustion engine: fuel type, combustion process;

              (b) Periodically regenerating system (i.e. catalyst, particulate trap);

                     (i) Construction (i.e. type of enclosure, type of precious metal, type of substrate, cell density);

                  (ii) Type and working principle;

                  (iii) Volume ±10 per cent;

                     (iv) Location (temperature ±100 °C at second highest reference speed).

                  (c) The test mass of each vehicle in the family shall be less than or equal to the test mass of the vehicle used for the Ki demonstration test plus 250 kg.

              6.3.6. Gas Fuelled Vehicles (GFV) Family

              6.3.6.1. GFVs may be grouped into a family of vehicle types fuelled by LPG or NG/biomethane which are then identified by a parent vehicle. For vehicles which can also be fuelled by liquid fuels, this grouping only applies when the vehicle is operated in a gas fuelled mode.

              6.3.6.2. A GFV parent vehicle is a vehicle that is selected to act as the vehicle on which the self-adaptability of a fuelling system is going to be demonstrated, and to which the members of a GFV family refer. It is possible to have more than one parent vehicle in a GFV family.

              6.3.6.3. Member of the GFV family

              6.3.6.3.1. Only vehicles which share the following essential characteristics with its GFV parent(s) may be grouped in a GFV family:

                  (a) It is produced by the same manufacturer;

                  (b) It is subject to the same emission limits;

                  (c) If the gas fuelling system has a central metering for the whole engine:

                  It has a certified power output between 0.7 and 1.15 times that of the GFV parent vehicle;

              (d) If the gas fuelling system has an individual metering per cylinder:

                  It has a certified power output per cylinder between 0.7 and 1.15 times that of the GFV parent vehicle;

                  (e) If fitted with a catalyst, it has the same type of catalyst i.e. three-way, oxidation, de-NOx;

                  (f) It has a gas fuelling system (including the pressure regulator) from the same system manufacturer and of the same type: induction, vapour injection (single point, multipoint), liquid injection (single point, multipoint);

                  (g) This gas fuelling system is controlled by an ECU of the same type and technical specification, containing the same software principles and control strategy. The