Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:9:p29
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 9 (pt 29/37)
Character Range: 1859170–1862304

total, this procedure lasts 175 hours.
    Figure C3/2
Temperature conditioning cycle
              5.1.2. Ageing through exposure to vibration
              Following the temperature ageing procedure, the carbon canister shall be shaken vertically with the carbon canister mounted as per its orientation in the vehicle with an overall Grms (root mean square acceleration) > 1.5 m/sec2 with a frequency of 30 ±10 Hz. The test shall last 12 hours.
              5.1.3. Ageing through exposure to fuel vapour and determining BWC300
              5.1.3.1. Ageing shall consist of repeatedly loading with fuel vapour and purging with laboratory air.
              5.1.3.1.1. After temperature and vibration ageing, the carbon canister shall be further aged with a mixture of market fuel as specified in paragraph 5.1.3.1.1.1. of this annex and nitrogen or air with a 50 ±15 per cent fuel vapour volume. The fuel vapour fill rate shall be 60 ±20 g/h.
              The carbon canister shall be loaded to 2 gram breakthrough. Alternatively, loading shall be considered to be completed when the hydrocarbon concentration level at the vent outlet reaches 3,000 ppm.
              5.1.3.1.1.1. The market fuel used for this test shall fulfil the same requirements as a reference fuel with respect to:
              (a) Density at 15 °C;
              (b) Vapour pressure;
              (c) Distillation (70 °C, 100 °C, 150 °C);
              (d) Hydrocarbon analysis (olefins, aromatics, benzene only);
              (e) Oxygen content;
              (f) Ethanol content.
              5.1.3.1.2. The carbon canister shall be purged between 5 and 60 minutes after loading with 25 ±5 litres per minute of emission laboratory air until 300 bed volume exchanges are reached.
              5.1.3.1.3. The procedures set out in paragraphs 5.1.3.1.1. and 5.1.3.1.2. of this annex shall be repeated 300 times after which the carbon canister shall be considered to be stabilised.
              5.1.3.1.4. The procedure to measure the butane working capacity (BWC) with respect to the evaporative emission family in paragraph 6.6.3. of this Regulation shall consist of the following.
                  (a) The stabilised carbon canister shall be loaded to 2 gram breakthrough and subsequently purged a minimum of 5 times. Loading shall be performed with a mixture composed of 50 per cent butane and 50 per cent nitrogen by volume at a rate of 40 grams butane per hour.
                  (b) Purging shall be performed according to paragraph 5.1.3.1.2. of this annex.
              (c) The BWC shall be recorded after each loading.
              (d) BWC300 shall be calculated as the average of the last 5 BWCs.
              5.1.3.2. If the aged carbon canister is provided by a supplier, the vehicle manufacturer shall inform the responsible authority in advance of the ageing process to enable the witnessing of any part of that process.
              5.1.3.3. The manufacturer shall provide the responsible authority a test report including at least the following elements:
              (a) Type of activated carbon;
              (b) Loading rate;