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Method and System for Fuel Vapor Control

  • US 20110265768A1
  • Filed: 04/29/2011
  • Published: 11/03/2011
  • Est. Priority Date: 04/29/2011
  • Status: Active Grant
First Claim
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1. A method of operating a fuel vapor recovery system, comprising,purging fuel vapors from a canister to an engine intake to reduce a stored fuel vapor amount in the canister;

  • andintermittently purging fuel vapors from a fuel tank to the canister to increase a stored fuel vapor amount in a canister buffer, a duration and interval of the intermittent purging based on the stored fuel vapor amount in the buffer.

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