Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Reexamination Certificate
2005-04-05
2005-04-05
Lo, Weilun (Department: 3747)
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
C096S139000, C096S144000, C096S152000
Reexamination Certificate
active
06874483
ABSTRACT:
The invention relates to a canister (1) of an evaporated fuel processing system comprising a housing (2) enclosing adsorbing chambers (4, 5) connected in series, where the first adsorbing chamber is connected to a fuel tank (19) and to an intake pipe (20) of an internal combustion engine and the last or outlet adsorbing chamber (5) comprises an atmospheric port. A perforated plate (21) is positioned inside the outlet adsorbing chamber (5) across a vapors flow path. To meet the emission standards and to ensure the proper canister behavior during tank (19) refueling, the perforated plate (21) comprises at least one vapor channel (26) with a valve (27a), extending inside the outlet adsorbing chamber for a distance (h) less than or equal to the thickness (H) of adsorbent layer behind the perforated plate. During use, the valve opens in response to increased pressure to reduce flow resistance through the outlet absorbing chamber, but otherwise remains closed to maximize vapor flow through the absorbent layer. In a preferred embodiment of the canister, the valve in the vapor channel (26) is a pressure controlled direct action valve that opens when flow restriction through the adsorbent layer exceeds the valve opening pressure.
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patent: 20020078931 (2002-06-01), Makino et al.
Delphi Technologies Inc.
Funke Jimmy L.
Lo Weilun
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