Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 12, 2016
Patent Application Number
14260900
Date Filed
April 24, 2014
Patent Citations Received
Patent Primary Examiner
Patent abstract
Methods and systems are described for depressurizing a fuel tank prior to refueling. In one example, before refueling the fuel tank having a pressure above a first predetermined pressure, the pressure may be released through a first valve to the first predetermined pressure and the first valve may be closed. Further, a second valve may be opened to further reduce the pressure to a second predetermined pressure, and if flow through the second valve is less than desired, then the first valve may be opened until the second predetermined pressure is reached.
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