Evaporative emissions control fuel cap

  • US 7,261,093 B2
  • Filed: 07/19/2005
  • Issued: 08/28/2007
  • Est. Priority Date: 07/21/2004
  • Status: Active Grant
First Claim
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1. An evaporative emissions control system comprisinga closure structured to mate with and close a fuel tank filler neck, the closure being formed to include a fuel vapor entry port, an atmospheric air entry port, and a fuel vapor-conducting passageway interconnecting the fuel vapor entry port and the atmospheric air entry port,a hydrocarbon adsorbing filter unit positioned to lie in the fuel vapor-conducting passageway to adsorb hydrocarbon material entrained in fuel vapor passing from the fuel tank filler neck into the fuel vapor-conducting passageway through the fuel vapor entry port to produce a stream of filtered vapor exiting the fuel vapor-conducting passageway through the atmospheric air entry port, andwherein the fuel vapor-conducting passageway from the fuel vapor entry port extends along a first direction, a second direction generally perpendicular to the first direction and through a passageway portion substantially filled with adsorbent material and extending along a third direction different from the first and second directions wherein fuel vapor passes from the fuel tank into the fuel vapor-conducting passageway through the fuel vapor entry port and produces a stream of filtered vapor exiting the fuel vapor-conducting passageway through the atmospheric air port.

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