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Textual Amendments
Before performing the hot soak and diurnal losses sequences, the canister(s) must be aged according the following procedure described in Figure 2.
In a dedicated temperature chamber, the canister(s) is (are) cycled between temperatures from – 15 °C to 60 °C, with 30 min of stabilisation at – 15 °C and 60 °C. Each cycle shall last 210 min as in Figure 3. The temperature gradient shall be as close as possible to 1 °C/min. No forced air flow should pass through the canister(s).
The cycle is repeated 50 times consecutively. In total, this operation will last 175 hours.
After the temperature aging procedure, the canister(s) is (are) shaken along the vertical axis with the canister(s) mounted as per its orientation in the vehicle with overall Grms (1) > 1,5 m/sec 2 with frequency of 30 ± 10 Hz. The test shall last 12 hours.
The canister(s) is (are) loaded to the corresponding breakthrough. Breakthrough shall be considered as the point at which the cumulative quantity of hydrocarbons emitted is equal to 2 grams. As an alternative, the loading is deemed completed when the equivalent concentration level at the vent hole reaches 3 000 ppm.
Density at 15 °C
Vapour Pressure (DVPE)
Distillation (evaporates only)
Hydrocarbon analysis (olefins, aromatics, benzene only)
Oxygen content
Ethanol content
The canister must be purged between 5 minutes to 1 hour maximum after loading.
Then, the canister(s) shall be purged according the procedure of paragraph 5.1.3.8 of Annex 7 to UN/ECE Regulation No 83.
The canister must be purged between 5 minutes to 1 hour maximum after loading.
The operation of butane loading is repeated 5 times. The BWC is recorded after each butane loading step. The BWC 50 is calculated as the average of the 5 BWC and recorded.
In total, the canister(s) will be aged with 300 fuel aging cycles + 10 butane cycles and considered to be stabilised.
Type of activated carbon,
Loading rate,
Fuel specifications,
BWC measurements]
:
The root mean square (rms) value of the vibration signal is calculated by squaring the magnitude of the signal at every point, finding the average (mean) value of the squared magnitude, then taking the square root of the average value. The resulting number is the Grms metric.]