Abstract: An improved filter apparatus for a cryogenic fluid includes a filter and a support. The filter includes a mesh having an internal space and an open end. The support is associated with the mesh for maintaining a volume of the internal space above a predetermined value. In operation cryogenic fluid enters the internal space through the mesh and exits the open end thereof.

Abstract: An improved filter apparatus for a cryogenic fluid includes a filter and a support. The filter includes a mesh having an internal space and an open end. The support is associated with the mesh for maintaining a volume of the internal space above a predetermined value. In operation cryogenic fluid enters the internal space through the mesh and exits the open end thereof.

Abstract: Gaseous fuel downstream of a heat exchanger can be too cold for fuel system components when the temperature of engine coolant employed as a working fluid in the heat exchanger is too low to elevate gaseous fuel temperature, and it is possible for the engine coolant to freeze. A method of operating a cryogenic pump for controlling discharge temperature of a heat exchanger that vaporizes a process fluid received from the cryogenic pump with heat from a working fluid, where the cryogenic pump includes a piston reciprocatable in a cylinder between a proximate cylinder head and a distal cylinder head, includes monitoring at least one of process fluid temperature and working fluid temperature; retracting the piston during an intake stroke from the proximate cylinder head to the distal cylinder head; and extending the piston in a plurality of incremental discharge strokes until the piston travels from the distal cylinder head back to the proximate cylinder head.

Abstract: Gaseous fuel downstream of a heat exchanger can be too cold for fuel system components when the temperature of engine coolant employed as a working fluid in the heat exchanger is too low to elevate gaseous fuel temperature, and it is possible for the engine coolant to freeze. A method of operating a cryogenic pump for controlling discharge temperature of a heat exchanger that vaporizes a process fluid received from the cryogenic pump with heat from a working fluid, where the cryogenic pump includes a piston reciprocatable in a cylinder between a proximate cylinder head and a distal cylinder head, includes monitoring at least one of process fluid temperature and working fluid temperature; retracting the piston during an intake stroke from the proximate cylinder head to the distal cylinder head; and extending the piston in a plurality of incremental discharge strokes until the piston travels from the distal cylinder head back to the proximate cylinder head.