SYSTEMS AND METHODS FOR VEHICLE MULTI-CANISTER EVAPORATIVE EMISSIONS SYSTEMS

DRIVE November 26, 2020
Source
Methods and systems are provided for improving canister back-purging operations in multi-canister evaporative emissions systems. In one example a method comprises controlling a state of one or more valves positioned in the evaporative emissions system of a vehicle that includes at least two fuel vapor storage canister, so that fuel vapors may be selectively purged from a single canister while other canisters are bypassed. In this way, fuel vapors from the single canister may be directly back-purged to the fuel tank, which may in turn reduce opportunity for release of undesired evaporative emissions to atmosphere.

Discussion in the ATmosphere

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