Fuel tank temperature and pressure management via selective extraction of liquid fuel and fuel vapor

摘要

FUEL TANK TEMPERATURE AND PRESSURE MANAGEMENT VIA SELECTIVE EXTRACTION OF LIQUID FUEL AND FUEL VAPOR A method and apparatus for managing temperature and pressure of fuel in a fuel tank stored at or near its vapor pressure. In response to fuel feed pressure, a variable ratio of liquid fuel to fuel vapor is extracted from the fuel tank in order to regulate temperature and pressure of the fuel for the purpose of keeping the pressure lower in anticipation of refilling or to assist a vaporizer of the fuel system which is incompletely vaporizing the fuel. P010938-GMVE-L CH Legal Staff, GM Co., Detroit, MI 210- VAPORIZER-REGULATOR FUEL CONSUMER 206--) t -208 FF2 212 FLOW 202 200 204V CONTROLS VAPOR 204Vb~ 204L LIQUID FF1 204e~ oiV INITIALIZE SYSTEM AT FUEL CONSUMER ON OBTAIN DATA 22 INCREASE VAPOR ,-"IS FUEL FEED PRESSURE.> UPPER PORTION OF THRESHOLD? YES EXTRACTED FUEL 23 NO{ 23023 ISFULTEEHRESSURE?