초록

A fuel vapor storage canister has inner and outer covers that define a labyrinth through which the purge air flow is directed. The labyrinth inhibits ingestion of water and dirt as purge air is drawn into the canister.

대표청구항 ▼

A fuel vapor storage canister comprising a housing having a bed of material adapted to absorb fuel vapor, an inner cover having a base closing one end of said housing, said base having a central aperture for air flow into said bed, said inner cover further having a plurality of concentric barriers s

A fuel vapor storage canister comprising a housing having a bed of material adapted to absorb fuel vapor, an inner cover having a base closing one end of said housing, said base having a central aperture for air flow into said bed, said inner cover further having a plurality of concentric barriers surrounding said aperture and projecting outwardly from said base, an outer cover supported on said inner cover, said outer cover having a roof and a plurality of concentric barriers projecting inwardly from said roof, said outer cover barriers being interleaved with said inner cover barriers to define a labyrinthine passage for air flow to said aperture, said covers thereby inhibiting the passage of water and dust to said aperture.