Document ID: chunk:federal_register_of_legislation:F2011C00805:reg:12:p2
Version: federal_register_of_legislation:F2011C00805
Segment Type: reg
Provision Reference: reg 12 (pt 2/7)
Character Range: 351449–354303

2.6.1. For equipment used for the measurement of volume, temperature, pressure and humidity the provisions in paragraphs 4.4. and 4.6. of Annex 4 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 than three consecutive minutes.

        3.1.2. The test cell temperature monitored during testing shall be measured at the output of the cooling fan (paragraph 5.2.1. of this Annex). The ambient temperature reported shall be an arithmetic average of the test cell temperatures measured at constant intervals no more than one minute apart.

        3.2. Test procedure

        The Part One urban driving cycle according to Figure 1/1 in Annex 4, Appendix 1, consists of four elementary urban cycles which together make a complete Part One cycle.

        3.2.1. Start of engine, start of the sampling and the operation of the first cycle shall be in accordance with Table 1.2 and Figure 1/1 in Annex 4.

        3.3.  Preparation for the test

        3.3.1. For the test vehicle the provisions of paragraph 3.1. of Annex 4 apply. For setting the equivalent inertia mass on the dynamometer the provisions of paragraph 5.1. of Annex 4 apply.

Figure 8/1

Procedure for low ambient temperature test

        3.4. Test fuel

        3.4.1.  The test fuel must comply with the specifications given in paragraph 3. of Annex 10.

        4. VEHICLE PRECONDITIONING

        4.1. Summary

        4.1.1.  To ensure reproducible emission tests, the test vehicles shall be conditioned in a uniform manner. The conditioning consists of a preparatory drive on a chassis dynamometer followed by a soak period before the emission test according to paragraph 4.3.

        4.2.  Preconditioning

        4.2.1.  The fuel tank(s) shall be filled with the specified test fuel. If the existing fuel in the fuel tank(s) does not meet the specifications contained in paragraph 3.4.1. above, the existing fuel shall be drained prior to the fuel fill. The test fuel shall be at a temperature less than or equal to 289 K (+ 16 C). For the above operations the evaporative emission control system shall neither be abnormally purged nor abnormally loaded.

        4.2.2.  The vehicle is moved to the test cell and placed on the chassis dynamometer.

        4.2.3.  The preconditioning consists of the driving cycle according to Annex 4, Appendix 1, Figure 1/1, Parts One and Two. At the request of the manufacturer, vehicles with a positive-ignition