Evaporative emissions canister having an internal insert

Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system

Reexamination Certificate

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Details

C123S519000

Reexamination Certificate

active

07051717

ABSTRACT:
An emissions control canister including an insert having an elongate well and flange. The insert extends into a chamber such that a carbon adsorption column is a hollow cylinder around the insert. After vapors flow through the column of adsorbent, flow is directed through holes in the flange and out through an atmosphere port. The flow path through the hollow cylinder has an increased L/D ratio and improves emission performance. In a second embodiment, a cylindrical tube surrounds the exit port and extends into the insert, forcing vapor flow along a tortuous path between the cylindrical wall and the insert. In a third embodiment, a final scrubber is added inside the tube.

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patent: 5861050 (1999-01-01), Pittel et al.
patent: 5878729 (1999-03-01), Covert et al.
patent: 5912368 (1999-06-01), Satarino et al.
patent: 6047687 (2000-04-01), Ishikawa et al.

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