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Fuel tank pressure sensor rationality for a hybrid vehicle during refueling

  • US 9,751,396 B2
  • Filed: 02/24/2015
  • Issued: 09/05/2017
  • Est. Priority Date: 02/24/2015
  • Status: Active Grant
First Claim
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1. A method for a fuel emissions system of a hybrid vehicle, comprising:

  • during a refueling event when a fuel tank is being refueled and while a fuel tank level is increasing,maintaining a fuel vapor canister vent line restriction; and

    indicating degradation of a fuel tank pressure sensor based on a pressure in a canister vent line.

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