Document ID: chunk:federal_register_of_legislation:F2012C00283:reg:7:p30
Version: federal_register_of_legislation:F2012C00283
Segment Type: reg
Provision Reference: reg 7 (pt 30/51)
Character Range: 588977–591827

the same family with the exception of their certified power output, respectively P1 and P2 (P1 < P2), and both are tested as if were parent vehicles the family relation will be considered valid for any vehicle with a certified power output between 0.7 P1 and 1.15 P2.
              3. Granting of a type approval
               Type approval is granted subject to the following requirements:
              3.1. Exhaust emissions approval of a parent vehicle
               The parent vehicle should demonstrate its capability to adapt to any fuel composition that may occur across the market. In the case of LPG there are variations in C3/C4 composition. In the case of NG/biomethane there are generally two types of fuel, high calorific fuel (H-gas) and low calorific fuel
              (L-gas), but with a significant spread within both ranges; they differ significantly in Wobbe index. These variations are reflected in the reference fuels.
              3.1.1. The parent vehicle(s) shall be tested in the test Type I on the two extreme reference fuels of Annex 10a.
              3.1.1.1. If the transition from one fuel to another is in practice aided through the use of a switch, this switch shall not be used during type approval. In such a case on the manufacturer's request and with the agreement of the Technical Service the pre-conditioning cycle referred in paragraph 6.3. of Annex 4a may be extended.
              3.1.2. The vehicle(s) is (are) considered to conform if, with both reference fuels, the vehicle complies with the emission limits.
              3.1.3. The ratio of emission results "r" should be determined for each pollutant as shown below:
Type(s) of fuel                     Reference fuels  Calculation of "r"
LPG and petrol                      Fuel A
(Approval B)
or LPG only                         Fuel B
(Approval D)
NG/biomethane and petrol            Fuel G 20
(Approval B)
Or NG/biomethane only (Approval D)  Fuel G 25

              3.2. Exhaust emissions approval of a member of the family:
               For the type approval of a mono fuel gas vehicle and bi fuel gas vehicles operating in gas mode as a member of the family, a test Type I shall be performed with one gas reference fuel. This reference fuel may be either reference fuels. The vehicle is considered to comply if the following requirements are met:
              3.2.1. The vehicle complies with the definition of a family member as defined under paragraph 2.2. above.
              3.2.2. If the test fuel is reference fuel A for LPG or G20 for NG/biomethane, the emission result shall be multiplied by the relevant factor "r" if r > 1; if r < 1, no correction is needed.
               If the test fuel is reference fuel B for LPG or G25 for NG/biomethane, the emission result shall be divided by the relevant factor "r" if r < 1; if r >