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Convection heating assisted engine-off natural vacuum test

  • US 10,001,088 B2
  • Filed: 02/04/2016
  • Issued: 06/19/2018
  • Est. Priority Date: 02/04/2016
  • Status: Active Grant
First Claim
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1. A method comprising:

  • routing fuel vapors from a fuel tank to an evaporative emission system which is coupled to atmosphere, the fuel tank supplying fuel to an engine which propels a vehicle; and

    during an engine-off condition and responsive to predetermined test conditions, sealing the fuel tank and the evaporative emission system from atmosphere, and routing engine heat through a passenger cabin of the vehicle to the fuel tank via a heater core to raise pressure in the fuel tank and the evaporative emission system.

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