FUEL SYSTEM HAVING FILTER ASSEMBLY WITH VALVE COVER
A filter assembly is disclosed for use with a fuel system. The filter assembly may have a base with a first side, and a second side opposite the first side. The filter assembly may also have a filter extending from the first side of the base, a valve extending from the second side of the base, and a metallic cover having a closed end surrounding the valve and an open end located adjacent the second side of the base. The filter assembly may further have a seal sandwiched between the metallic cover and the base, a retainer connected to the base and extending over the metallic cover, and a fastener threadingly engaged with the retainer and protruding inward to press the metallic cover toward the base.
1 . A filter assembly, comprising:
a base having a first side and a second side opposite the first side;
a filter extending from the first side of the base;
a valve extending from the second side of the base;
a metallic cover having a closed end surrounding the valve, and an open end located adjacent the second side of the base;
a seal sandwiched between the metallic cover and the base;
a retainer connected to the base and extending over the metallic cover; and
a fastener threadingly engaged with the retainer and protruding inward to press the metallic cover toward the base.
2 . The filter assembly of claim 1 wherein:
the metallic cover includes a lip located at the open end and configured to engage the seal; and
the lip has a circular-lay roughness of about 100-150 μinch.
3 . The filter assembly of claim 2 , wherein the lip has a circular-lay roughness of about 125 μinch.
4 . The filter assembly of claim 1 , wherein the metallic cover is fabricated from stainless steel.
5 . The filter assembly of claim 4 , wherein the metallic cover is fabricated through a deep-draw process.
6 . The filter assembly of claim 1 , wherein:
the retainer is pivotal relative to the base; and
the metallic cover is pivotal relative to the retainer.
7 . The filter assembly of claim 1 , wherein:
the valve is a first valve;
the metallic cover is a first metallic cover;
the seal is a first seal;
the fastener is a first fastener;
the filter assembly further includes:
a second valve extending from the second side of the base adjacent the first valve;
a second metallic cover having a closed end surrounding the second valve, and an open end located adjacent the second side of the base; and
a second seal sandwiched between the second metallic cover and the base;
the retainer is configured to extend over both the first and second metallic covers; and
the filter assembly further includes a second fastener threadingly engaged with the retainer and protruding inward from the retainer to press the second metallic cover toward the base.
8 . The fitter assembly of claim 7 , wherein:
the retainer is non-pivotal relative to the base; and
the first and second metallic covers are independently pivotal relative to the retainer.
9 . The filter assembly of claim 7 , wherein each of the first and second fasteners includes a head having a hole therethrough that is configured to receive a safety wire that inhibits loosening of the first and second fasteners.
10 . The filter assembly of claim 1 , wherein the valve is a check valve configured to allow fluid flow through the check valve into an open area inside the metallic cover.
11 . The filter assembly of claim 1 , wherein a thickness of the retainer at the fastener is at least two times a wall thickness of the metallic cover.
12 . The filter assembly of claim 1 , further including a sensor mounted to the base and configured to generate a signal indicative of a pressure inside the metallic cover.
13 . A filter assembly, comprising:
a base having a first side and a second side opposite the first side;
a filter extending from the first side of the base;
a valve extending from the second side of the base;
a cover having a closed end surrounding the valve, and an open end located adjacent the second side of the base;
a seal sandwiched between the cover and the base;
a retainer having first and second sides connected to the base, and a third side extending over the cover between the first and second sides, wherein the first, second, and third sides form a generally C-shaped channel; and
a fastener threadingly engaged with the third side of the retainer and protruding inward to press the cover toward the base.
14 . The filter assembly of claim 13 , wherein:
the cover includes a lip located at the open end and configured to engage the seal; and
the lip has a circular-lay roughness of about 125 μinch.
15 . The filter assembly of claim 13 , wherein:
the retainer is pivotal relative to the base; and
the cover is pivotal relative to the retainer.
16 . The filter assembly of claim 13 , wherein:
the valve is a first valve;
the cover is a first cover;
the seal is a first seal;
the fastener is a first fastener;
the filter assembly further includes:
a second valve extending from the second side of the base adjacent the first valve;
a second cover having a closed end surrounding the second valve, and an open end located adjacent the second side of the base; and
a second seal sandwiched between the second cover and the base;
the retainer is configured to extend over both the first and second covers; and
the filter assembly further includes a second fastener threadingly engaged with the retainer and protruding inward from the retainer to press the second cover toward the base.
17 . The filter assembly of claim 16 , wherein:
the retainer is non-pivotal relative to the base; and
the first and second covers are independently pivotal relative to the retainer.
18 . The filter assembly of claim 13 , wherein a thickness of the third side of the retainer is at least two times a wall thickness of the cover.
19 . The filter assembly of claim 13 , further including a sensor mounted to the base and configured to generate a signal indicative of a pressure inside the cover.
20 . A fuel system, comprising:
a tank;
a pump connected to draw fuel from the tank;
a plurality of fuel injectors;
a manifold connecting the pump to the plurality of fuel injectors; and
a filter assembly disposed between the pump and the manifold, the filter assembly including:
a base having a first side and a second side opposite the first side;
a filter extending from the first side of the base;
a first valve extending from the second side of the base;
a second valve located adjacent the first valve and extending from the second side of the base;
a first metallic cover having a closed end surrounding the first valve, and an open end located adjacent the second side of the base;
a second metallic cover having a closed end surrounding the second valve, and an open end located adjacent the second side of the base;
a seal sandwiched between each of the first and second metallic covers and the base;
a first retainer having first and second sides connected to the base, and a third side extending over the first metallic cover between the first and second sides, wherein the first, second, and third sides form a first generally C-shaped channel;
a second retainer having first and second sides connected to the base, and a third side extending over the second metallic cover between the first and second sides, wherein the first, second, and third sides form a second generally C-shaped channel;
a first fastener threadingly engaged with the third side of the first retainer and protruding inward to press the first metallic cover toward the base;
a second fastener threadingly engaged with the third side of the second retainer and protruding inward to press the second metallic cover toward the base; and
a safety wire passing through a head of at least one of the first and second fasteners to inhibit loosening of the at least one of the first and second fasteners,
wherein:
the first and second metallic covers each includes a lip located at the open end and configured to engage the seal; and
the lip has a circular-lay roughness of about 125 μinch.