SYSTEMS AND METHODS FOR FUEL VAPOR CANISTER PURGING

摘要

Methods and systems are provided for purging a fuel vapor canister. In one example, a method may include during boosted engine operating conditions, utilizing regulated compressed air from an engine intake to purge fuel vapors stored in the fuel vapor canister. Further, during non-boosted condition, regulated air from the intake may be utilized to purge the fuel vapor canister. The purged fuel vapors and intake air may be delivered to upstream of a compressor when operating with boost, or to an intake manifold when operating without boost.

主权项

1. A method for a boosted engine, comprising:
during purging a fuel vapor canister,
during a boosted condition, flowing compressed air from a first intake passage downstream of a compressor into the canister, and delivering purge gases from the canister to a second intake passage upstream of the compressor; andduring a non-boosted condition, flowing un-compressed air from the first intake passage into the canister, and delivering the purge gases to an engine intake manifold.