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1
US20040265659A1
Publication/Patent Number: US20040265659A1
Publication date: 2004-12-30
Application number: 10/606,850
Filing date: 2003-06-26
Abstract: In a fuel cell assembly, a passive gas spring is disposed between the stack and the supporting structure for maintaining compressive force on the stack and manifold seal. As variation in temperature of the assembly and structure causes dimensional changes therein, the pressure within the gas spring also changes accordingly. The gas spring is provided with inlet and outlet check valves, the outlet check valve opening to expel air when internal spring pressure reaches a predetermined upper pressure limit, and the inlet check valve opening to admit air when the internal spring pressure falls below a predetermined lower pressure limit in a currently preferred embodiment, the outlet check valve allows exit of gas from the gas spring at pressures exceeding 5 psig, to prevent rupture of the gas spring, and the inlet check valve allows entrance of gas into the gas spring as the spring cools following use. In a fuel cell assembly, a passive gas spring is disposed between the stack and the supporting structure for maintaining compressive force on the stack and manifold seal. As variation in temperature of the assembly and structure causes dimensional changes therein, the pressure ...more ...less
2
US20030234455A1
Publication/Patent Number: US20030234455A1
Publication date: 2003-12-25
Application number: 10/357,920
Filing date: 2003-02-04
Abstract: A non-contact fuel vaporizer adds heat to the injected fuel by combining the fuel with heated air in a vaporization chamber downstream of air supply inlets. The fuel is metered axially through a conventional fuel injector. The heated air is metered through an air director plate that introduces the air in a helical trajectory concentrically around the injector spray. When the hot swirling air comes in contact with the atomized fuel, substantially all of the fuel is vaporized before coming into contact with a wall of the vaporization chamber. A non-contact fuel vaporizer adds heat to the injected fuel by combining the fuel with heated air in a vaporization chamber downstream of air supply inlets. The fuel is metered axially through a conventional fuel injector. The heated air is metered through an air director plate ...more ...less