CPC F02M 25/0836 (2013.01) [F02M 25/089 (2013.01)] | 20 Claims |
1. A method for an evaporative emission control (EVAP) system, comprising:
flowing vapors to canisters in parallel outside of a purging event and a refueling event;
during a vehicle shut-off event not comprising the refueling event, flowing vapors to the canisters in series with a less loaded canister downstream of a more loaded canister.
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