Document ID: chunk:federal_register_of_legislation:F2012C00283:reg:12:p2
Version: federal_register_of_legislation:F2012C00283
Segment Type: reg
Provision Reference: reg 12 (pt 2/10)
Character Range: 424235–427168

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 in Annex 4a, 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 and Figure 1 in Annex 4a.
              3.3. Preparation for the test
              3.3.1. For the test vehicle the provisions of paragraph 3.2. of Annex 4a apply. For setting the equivalent inertia mass on the dynamometer the provisions of paragraph 6.2.1. of Annex 4a 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 2. 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 one complete driving cycle, Parts One and Two, according to Tables 1 and 2 and Figure 1 of Annex 4a. At the request of the manufacturer, vehicles with a positive-ignition engine may be preconditioned with one Part One and two Part Two driving cycles.
              4.2.4. During the preconditioning the test cell temperature shall remain relatively constant and not be higher than 303 K (30 °C)
              4.2.5. The drive-wheel tyre pressure shall be set in accordance with the provisions of paragraph 6.2.3. of Annex 4a.
              4.2.6. Within ten minutes of completion of the preconditioning, the engine