Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:12:p4
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 12 (pt 4/5)
Character Range: 1894853–1897870

carbon canister shall be weighed before and after the procedure described in paragraph 6.6.1.7. of this annex.

              6.6.1.8.2. The depressurisation puff loss overflow from the vehicle carbon canister during its depressurisation may be measured using a SHED.

              Within 15 minutes after the ambient temperature has reached 35°C as described in paragraph 6.6.1.6. of this annex, the chamber shall be sealed and the measurement procedure shall be started.

              The hydrocarbon analyser shall be zeroed and spanned, after which the hydrocarbon concentration (CHCi), temperature (Ti) and barometric pressure (Pi) shall be measured to give the initial readings CHCi, Pi and Ti for the sealed tank depressurisation puff loss overflow determination.

              The ambient temperature T of the enclosure shall not be less than 25°C during the measurement procedure.

              At the end of the procedure described in paragraph 6.6.1.7.2. of this annex, the hydrocarbon concentration (CHCf) in the chamber shall be measured after 300 ± 5 seconds. The temperature (Tf) and the barometric pressure (Pf) shall also be measured. These are the final readings CHCf, Pf and Tf for the sealed tank depressurisation puff loss overflow.

              The sealed tank puff loss overflow result shall be calculated according to paragraph 7.1. of this annex and recorded.

              6.6.1.8.3. There shall be no change in weight of the additional carbon canister when testing according to paragraph 6.6.1.8.1. or the result of the SHED measurement when testing according to paragraph 6.6.1.8.2., within the tolerance of ± 0.5 gram.

              6.6.1.9. Soak

              After completing puff loss loading the vehicle carbon canister shall be replaced with a dummy carbon canister (of the same specification as the original but not necessarily aged), the vehicle shall then be soaked at 23 ±3 °C for 6 to 36 hours to stabilise the vehicle temperature.

              6.6.1.9.1. REESS charge

              For OVC-HEVs, the REESS shall be fully charged in accordance with the charging requirements described in paragraph 2.2.3. of Appendix 4 to Annex B8 during the soaking described in paragraph 6.6.1.9. of this annex.

              6.6.1.10. Fuel drain and refill

              The fuel tank of the vehicle shall be drained and filled up to 40 ±2 per cent of the tank's nominal capacity with reference fuel at a temperature of 18 °C ±2 °C.

              6.6.1.11. Soak

              The vehicle shall be subsequently parked for a minimum of 6 hours to a maximum of 36 hours in the soak area at 20 °C ±2 °C to stabilise the fuel temperature.

              6.6.1.12. Fuel tank depressurisation

              The tank pressure shall be subsequently released so as not to abnormally raise the inside pressure of the fuel tank. This may be done by opening the fuel cap of the vehicle. Regardless of the method of depressurisation, the vehicle shall be returned to its original condition