Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p96
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 96/150)
Character Range: 993135–995936

a grid cell with 5 test points.
7.4.5. The average specific mass emissions of regulated particulate pollutants shall not exceed the WNTE limit values specified in paragraph 5.2. when measured over the whole 15 test point cycle.
7.5. Laboratory test procedure
7.5.1. After completion of the WHSC cycle, the engine shall be preconditioned at mode 9 of the WHSC for a period of three minutes. The test sequence shall start immediately after completion of the preconditioning phase.
7.5.2. The engine shall be operated for 2 minutes at each random test point. This time includes the preceding ramp from the previous steady state point. The transitions between the test points shall be linear for engine speed and load and shall last 20 ± 1 seconds.
7.5.3. The total test time from start until finish shall be 30 minutes. The test of each set of 5 selected random points in a grid cell shall be 10 minutes, measured from the start of the entry ramp to the 1st point until the end of the steady state measurement at the 5th point. Figure 5 illustrates the sequence of the test procedure.
7.5.4. The WNTE laboratory test shall meet the validation statistics of paragraph 7.8.7. of Annex 4.
7.5.5. The measurement of the emissions shall be carried out in accordance with paragraphs 7.5., 7.7. and 7.8. of Annex 4.
7.5.6. The calculation of the test results shall be carried out in accordance with paragraph 8. of Annex 4.
       Figure 4
       Schematic example of the start of the WNTE test cycle
    Figures 5 and 6
    WNTE test cycle grids

7.6. Rounding
 Each final test result shall be rounded in one step to the number of places to the right of the decimal point indicated by the applicable WHDC emission standard plus one additional significant figure, in accordance with
ASTM E 29-06. No rounding of intermediate values leading to the final brake specific emission result is permitted.
8. Reserved
9. Reserved
10.  Statement of off-cycle emission compliance
 In the application for type approval, the manufacturer shall provide a statement that the engine family or vehicle complies with the requirements of this Regulation limiting off-cycle emissions. In addition to this statement, compliance with the applicable emission limits and in-use requirements shall be verified through additional tests.
10.1. Example statement of Off-Cycle Emission compliance
 The following is an example compliance statement:
 "(Name of manufacturer) attests that the engines within this engine family comply with all requirements of this annex. (Name of manufacturer) makes this statement in good faith, after having performed an appropriate engineering evaluation of the emissions performance of the engines within the engine family over the applicable range of operating and ambient conditions."
10.2. Basis for