Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p21
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 21/150)
Character Range: 772673–775957

approvals and paragraph 13.3.4. for new registrations, paragraphs A.1.4.2.2.2.1. and A.1.4.2.2.2.2. shall apply.
              A.1.4.2.2.2.1.The valid windows are the windows whose average power exceeds the power threshold of 10 per cent of the maximum engine power.
              A.1.4.2.2.2.2.The test shall be void if the percentage of valid windows is less than 50 per cent or if there are no valid windows in respect of nitrogen oxides (NOx) left in urban only operations after the 90 percentile rule has been applied.
A.1.4.2.3. Calculation of the conformity factors
The conformity factors shall be calculated for each individual valid window and each individual pollutant in the following way:
Where:
                  e is the brake-specific emission of the gaseous pollutant, mg/kWh or #/kWh;

              L is the applicable limit, mg/kWh or #/kWh.
              A.1.4.3. CO2 mass based method
       Figure 3
       CO2 mass based method
              The duration (t2,i – t1,i) of the ith averaging window is determined by:
              Where:
              mCO2 (tj,i)  is the CO2 mass measured between the test start and time tj,i, kg;
              mCO2,ref is the CO2 mass determined for the WHTC, kg;
              t2,i  shall be selected such as:Δ<≤
              Where Δt is the data sampling period, equal to 1 second or less.
              The CO2 masses are calculated in the windows by integrating the instantaneous emissions calculated according to the requirements introduced in paragraph A.1.3.5.
              A.1.4.3.1. Selection of valid windows

              A.1.4.3.1.1. Before the dates referred to in paragraph 13.2.5. of this Regulation for new type approvals and paragraph 13.3.4. for new registrations, paragraphs A.1.4.3.1.1.1. to A.1.4.3.1.1.4. shall apply.

              A.1.4.3.1.1.1. The valid windows shall be the windows whose duration does not exceed the maximum duration calculated from:

           Where:

           Dmax the maximum window duration, s;

           Pmax is the maximum engine power, kW.

              A.1.4.3.1.1.2. If the percentage of valid windows is less than 50 per cent, the data evaluation shall be repeated using longer window durations. This is achieved by decreasing the value of 0.2 in the formula given in paragraph A.1.4.3.1. by steps of 0.01 until the percentage of valid windows is equal to or greater than 50 per cent.

              A.1.4.3.1.1.3.In any case, the lowered value in above formula shall not be lower than 0.15.

              A.1.4.3.1.1.4.The test shall be void if the percentage of valid windows is less than 50 % at a maximum window duration calculated in accordance with paragraphs A.1.4.3.1.1.1., A.1.4.3.1.1.2. and A.1.4.3.1.1.3.

              A.1.4.3.1.2. From the dates referred to in paragraph 13.2.5. of this Regulation for new type approvals and paragraph 13.3.4. for new registrations, paragraphs A.1.4.3.1.2.1. and A.1.4.3.1.2.2. shall apply.

              A.1.4.3.1.2.1. The valid windows shall be the windows whose duration does not exceed the maximum duration calculated from:

              where:

               Dmax  is the maximum window duration, s;

               Pmax  is the maximum engine power, kW.

              A.1.4.3.1.2.2. The test shall be void