Fuel filter system with water bleed and water trap
AssigneeStanadyne, Inc.
InventorM. Craig Maxwell
Life of this patent
Estimating the term…
Abstract
A fuel filter system employs a first filter (12) to separate water from the fuel and a second filter (38) which receives the water portion from the first filter (12) and removes the water from the residual fuel with the use of hygroscopic material (42) and recycles the residual fuel back to the fuel tank (16).
Claims13
A fuel filter system for a fuel system having a fuel tank for storing fuel, the filter system comprising:
- a first filter comprising an inlet in fluid communication with the fuel tank, first filter means for separating water from the fuel, sump means for collecting the water, and an outlet in fluid communication with the sump means;
- and
- a second filter comprising an enclosure, an inlet in fluid communication with the outlet of the first filter, second filter means comprising a hygroscopic material for absorbing the water, pressure sensing means for sensing the internal pressure within the enclosure, and an outlet in fluid communication with the fuel tank.
A filter system for a liquid delivery system for an internal combustion engine, the liquid delivery system having a storage tank containing a mixture of a first liquid and a second liquid, the filter system comprising:
- a first filter comprising an inlet in fluid communication with the storage tank, first filter means for separating the first liquid from the second liquid, sump means for collecting the first liquid, a first outlet for delivering the second liquid, and a second outlet in fluid communication with the sump means;
- and
- a second filter comprising an enclosure, an inlet in fluid communication with the second outlet of the first filter, second filter means comprising an absorptive material for absorbing the first liquid, pressure sensing means for sensing the internal pressure within the enclosure, and an outlet in fluid communication with the fuel tank.
A fuel system comprising:
- a fuel storage tank;
- a first filter comprising an inlet in fluid communication with the fuel tank, first filter means for separating water from the fuel, sump means for collecting the water, a first outlet for delivering the fuel, and a second outlet in fluid communication with the sump means;
- a second filter comprising an enclosure, an inlet in fluid communication with the outlet of the first filter, second filter means comprising a hygroscopic material for absorbing the water, pressure sensing means for sensing the internal pressure within the enclosure and for transmitting a signal proportional to the pressure within the enclosure, and an outlet in fluid communication with the fuel tank;
- a fuel injection pump having an inlet in fluid communication with the first outlet of the first filter and an outlet.
Dependencies are inferred from the claim text.