Document ID: chunk:federal_register_of_legislation:F2024L00443:front:0:p16
Version: federal_register_of_legislation:F2024L00443
Segment Type: other
Provision Reference: 
Character Range: 46955–49980

Before the test is carried out, the test vehicles shall be conditioned in a uniform manner to ensure that the test results may be reproducible. The conditioning and other test procedures are carried out as described in Annex 8 to this Regulation.
              5.3.5.1.4. During the test, the exhaust gases are diluted and a proportional sample collected. The exhaust gases of the vehicle tested are diluted, sampled and analysed, following the procedure described in Annex 8 to this Regulation, and the total volume of the diluted exhaust is measured. The diluted exhaust gases are analysed for carbon monoxide and total hydrocarbons.
              5.3.5.2. Subject to the requirements in paragraphs 5.3.5.2.2. and 5.3.5.3. the test shall be performed three times. The resulting mass of carbon monoxide and hydrocarbon emission shall be less than the limits shown in Table 2.

Table 2
Emission limit for the carbon monoxide and hydrocarbon tailpipe emissions after a cold start test
Test temperature 266 K (-7 °C)
                                       Mass of carbon monoxide  Mass of hydrocarbons (HC)
Vehicle category                Class  (CO)                     L2 (g/km)
                                       L1 (g/km)
M                               -      15                       1.8
N1                              I      15                       1.8
II                              24     2.7
III                             30     3.2
N2                              -      30                       3.2

              5.3.5.2.1. Notwithstanding the requirements of paragraph 5.3.5.2., for each pollutant, at least two of the three test results must be below the limit. One of the test results can exceed the limit but by no more than 10 per cent. The arithmetical mean value of the three test results for a pollutant must be below the prescribed limit. Where the prescribed limits are exceeded for more than one pollutant, it is immaterial whether this occurs in the same test or in different tests.
              5.3.5.2.2. The number of tests prescribed in paragraph 5.3.5.2. may, at the request of the manufacturer, be increased to 10 if the arithmetical mean of the first three results is lower than 110 per cent of the limit. In this case, the requirement after testing is only that the arithmetical mean of all 10 results shall be less than the limit value.
              5.3.5.3. The number of tests prescribed in paragraph 5.3.5.2. may be reduced according to paragraphs 5.3.5.3.1. and 5.3.5.3.2.
              5.3.5.3.1. Only one test is performed if the result obtained for each pollutant of the first test is less than or equal to 0.70 L.
              5.3.5.3.2. If the requirement of paragraph 5.3.5.3.1. is not satisfied, only two tests are performed if for each pollutant the result of the first test is less than or equal to 0.85 L and the sum of the first two results is less than or equal to 1.70 L and the result of the second test is less than or equal to L.
           (V1 ≤ 0.85 L and V1