Document ID: chunk:federal_register_of_legislation:F2012C00283:reg:12:p1
Version: federal_register_of_legislation:F2012C00283
Segment Type: reg
Provision Reference: reg 12 (pt 1/10)
Character Range: 420838–424419

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Annex 8
  Type VI Test

(Verifying the average exhaust emissions of carbon monoxide and hydrocarbons after a cold start at low ambient temperature)
              1. Introduction
               This annex applies only to vehicles with positive-ignition engines. It describes the equipment required and the procedure for the Type VI Test defined in paragraph 5.3.5 of this Regulation in order to verify the emissions of carbon monoxide and hydrocarbons at low ambient temperatures. Topics addressed in this Regulation include:
                 (i) Equipment requirements;
                 (ii) Test conditions;
                 (iii) Test procedures and data requirements.
              2. Test equipment
              2.1. Summary
              2.1.1. This chapter deals with the equipment needed for low ambient temperature exhaust emission tests of positive-ignition engined vehicles. Equipment required and specifications are equivalent to the requirements for the Type I Test as specified Annex 4a, with appendices, if specific requirements for the Type VI Test are not prescribed. Paragraphs 2.2. to 2.6. describe deviations applicable to Type VI low ambient temperature testing.
              2.2. Chassis dynamometer
              2.2.1. The requirements of Appendix 1 of Annex 4a apply. The dynamometer shall be adjusted to simulate the operation of a vehicle on the road at 266 K
              (-7 °C). Such adjustment may be based on a determination of the road load force profile at 266 K (-7 °C). Alternatively the driving resistance determined according to Appendix 7 of Annex 4a may be adjusted for a 10 per cent decrease of the coast-down time. The technical service may approve the use of other methods of determining the driving resistance.
              2.2.2. For calibration of the dynamometer the provisions of Appendix 1 of Annex 4a apply.
              2.3. Sampling system
              2.3.1. The provisions of Appendix 2 and Appendix 3 of Annex 4a apply.
              2.4. Analytical equipment
              2.4.1. The provisions of Appendix 3 of Annex 4a apply, but only for carbon monoxide, carbon dioxide, and total hydrocarbon testing.
              2.4.2. For calibrations of the analytical equipment the provisions of of Annex 4a apply.
              2.5. Gases
              2.5.1. The provisions of paragraph 3. of Appendix 3 of Annex 4a apply, where they are relevant.
              2.6. Additional equipment
              2.6.1. For equipment used for the measurement of volume, temperature, pressure and humidity the provisions in paragraph 4.6. of Annex 4a apply.
              3. Test sequence and fuel
              3.1. General requirements
              3.1.1. The test sequence in Figure 8/1 shows the steps encountered as the test vehicle undergoes the procedures for the Type VI Test. Ambient temperature levels encountered by the test vehicle shall average: 266 K (-7 °C) 3 K and shall not be less than 260 K (-13 °C), or more than 272 K (-1 °C).
               The temperature may not fall below 263 K (-10 °C), or exceed 269 K (-4 °C) for more