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METHOD AND SYSTEM FOR FUEL VAPOR CONTROL

  • US 20130112176A1
  • Filed: 11/08/2011
  • Published: 05/09/2013
  • Est. Priority Date: 11/08/2011
  • Status: Active Grant
First Claim
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1. A method of operating a fuel system including a fuel tank coupled to a fuel vapor canister via an isolation valve, comprising,purging fuel vapors from the canister to an engine intake for a duration with the isolation valve open until a threshold level of fuel tank vacuum is generated.

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