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System and method for improving fuel vapor purging for an engine having a compressor

  • US 7,743,752 B2
  • Filed: 07/18/2008
  • Issued: 06/29/2010
  • Est. Priority Date: 07/18/2008
  • Status: Active Grant
First Claim
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1. A system for purging a vehicle'"'"'s fuel vapor storage canister, the system comprising:

  • an internal combustion engine;

    a throttle valve for regulating air flow to the internal combustion engine;

    a compressor located upstream from the throttle valve in an intake system of said internal combustion engine;

    a fuel vapor canister that is in communication with said intake system at a first location that is downstream from the compressor, and the fuel vapor canister also in communication with said intake system at a second location that is downstream from the throttle valve; and

    a controller that adjusts a position of a valve to produce a desired canister flow rate at a pressure ratio across the valve.

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