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Turbocharged engine canister system and diagnostic method

  • US 8,924,133 B2
  • Filed: 02/28/2012
  • Issued: 12/30/2014
  • Est. Priority Date: 02/28/2012
  • Status: Active Grant
First Claim
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1. An evaporative emission control system for a turbocharged engine comprising:

  • a fuel vapor canister in fluid communication with an intake manifold of the turbocharged engine;

    a purge valve positioned between the intake manifold and the fuel vapor canister;

    a bypass valve positioned between the purge valve and the fuel vapor canister and connected to the atmosphere;

    an evaporative system integrity monitor operable to seal the canister from the atmosphere; and

    a vacuum ejector tee fluidly coupled between the intake manifold and the purge valve, the vacuum ejector tee having;

    a first port in fluid communication with the fuel vapor canister;

    a second port in fluid communication with an output of a turbocharger between the turbocharger and the intake manifold; and

    a third port in fluid communication with an input to the turbocharger.

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