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Vacuum supply system

  • US 8,297,263 B2
  • Filed: 06/24/2011
  • Issued: 10/30/2012
  • Est. Priority Date: 03/03/2010
  • Status: Active Grant
First Claim
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1. A method of operating a boosted engine system, comprising,pumping a purge flow through a fuel vapor canister and an ejector, and into an engine intake via a purge pump when boost is present;

  • drawing the purge flow through the fuel vapor canister and ejector, and into the engine intake via engine vacuum without operating the pump in the absence of boost; and

    applying the ejector to a vacuum actuator.

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