FUEL TANK PRESSURE RELIEF VALVE

• Main Author: POULTER, Trevor John
• Format: Patent
• Language: English; French; German
• Published: 29.07.2020
• Subjects: ACTUATING-FLOATS; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; TAPS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VALVES; VEHICLES IN GENERAL; WEAPONS

A fuel tank pressure relief valve for relieving a pressure difference between the interior and the exterior of a fuel tank, comprises first and second sealing surfaces 120, 122 which mate to form a seal between the interior and exterior of the fuel tank; a valve control mechanism; and a venting port 112. The valve control mechanism is configured to: open the seal formed between the first and second sealing surfaces when the interior pressure at the valve control mechanism is above the exterior pressure by more than a first threshold differential pressure; open the seal formed between the first and second sealing surfaces when the interior pressure at the valve control mechanism is lower than the exterior pressure by more than a second threshold differential pressure; and close the seal formed between the first and second sealing surfaces in a closed configuration when the interior pressure at the valve control mechanism is not above the exterior pressure by more than a first threshold differential pressure and is not lower than the exterior pressure by more than a second threshold differential pressure.