Document ID: chunk:federal_register_of_legislation:F2024L00443:reg:3:p2
Version: federal_register_of_legislation:F2024L00443
Segment Type: reg
Provision Reference: reg 3 (pt 2/13)
Character Range: 215548–218555

that the test cannot be performed by the methods described in paragraphs 6.1. to 6.4. of this annex, the measurements shall be effected by that method modified as follows:

              6.5.2. Before the test, all apertures other than that required for the recovery of the gases shall be closed;

              6.5.3. The bag shall be placed on a suitable take-off which does not introduce any additional loss of pressure and is installed on the recycling circuit of the device directly at the engine-connection aperture (see diagram below).

Type 3 test

Annex 7

Reserved
Annex 8

Type 6 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 6 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:
                  (a) Equipment requirements;
                  (b) Test conditions;
                  (c) 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 NEDC based Type I test as specified Annex 4a to the 07 series of amendments to this Regulation, with appendices, if specific requirements for the Type 6 test are not prescribed. Paragraphs 2.2. to 2.6. of this annex describe deviations applicable to Type 6 low ambient temperature testing.
              2.2. Chassis dynamometer
              2.2.1. The requirements of Appendix 1 to Annex 4a to the 07 series of amendments to this Regulation 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 to Annex 4a to the 07 series of amendments to this Regulation 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 to Annex 4a to the 07 series of amendments to this Regulation apply.
              2.3. Sampling system
              2.3.1. The provisions of Appendix 2 and Appendix 3 to Annex 4a to the 07 series of amendments to this Regulation apply.
              2.4. Analytical equipment
              2.4.1. The provisions of Appendix 3 to Annex 4a to the 07 series of amendments to this Regulation apply, but only for carbon monoxide, carbon