Division 1.1.4 F1

For the type-approval of a flex fuel H2NG vehicle as a member of a family, two type 1 tests shall be performed, the first test with 100 % of either G20 or G25, and the second test with the mixture of hydrogen and the same NG/biomethane fuel used during the first test, with the maximum hydrogen percentage specified by the manufacturer.

The vehicle tested in accordance with the first paragraph shall be considered as complying if, in addition to requirements set out in points (a), (e) and (g) of point 1.1.3., the following requirements are met:

1. (a)

   if the NG/biomethane fuel is the reference fuel G20, the emission result for each pollutant shall be multiplied by the relevant factors (r ₁ for the first test and r ₂ for the second test), calculated in section 1.1.2.5, if the relevant factor > 1; if the correspondent relevant factor < 1, no correction is needed;

2. (b)

   if the NG/biomethane fuel is the reference fuel G25, the emission result for each pollutant shall be divided by the correspondent relevant factor (r ₁ for the first test and r ₂ for the second test) calculated in accordance with point 1.1.2.5, if the correspondent relevant factor < 1; if the correspondent relevant factor > 1, no correction is needed;

3. (c)

   on the manufacturer's request the type 1 test must be performed with the four possible combinations of reference fuels, according to section 1.1.2.5, so that no correction is needed;

4. (d)

   if repeated tests are made on the same engine the results on reference fuel G20, or H2G20, and those on reference fuel G25, or H2G25 with the maximum hydrogen percentage specified by the manufacturer, shall first be averaged; the ‘r ₁ ’ and ‘r ₂ ’ factors shall then be calculated from these averaged results.