Abstract: An asymmetrical orifice for bypass control in a clean fuel module may include a body having first and second end surfaces and an inner surface defining a bore through the body extending from a first opening through the first end surface to a second opening through the second end surface. The first opening has a first opening inner diameter and the second opening has a second opening inner diameter that is less than the first opening inner diameter. The asymmetrical orifice also includes a flow control contour in the second end surface surrounding the second opening of the bore. The configuration may give the asymmetrical orifice a first discharge coefficient for fluid flowing from the first opening to the second opening that is greater than a second discharge coefficient for fluid flowing in a second direction from the second opening to the first opening.

Abstract: An asymmetrical orifice for bypass control in a clean fuel module may include a body having first and second end surfaces and an inner surface defining a bore through the body extending from a first opening through the first end surface to a second opening through the second end surface. The first opening has a first opening inner diameter and the second opening has a second opening inner diameter that is less than the first opening inner diameter. The asymmetrical orifice also includes a flow control contour in the second end surface surrounding the second opening of the bore.

Abstract: A coaxial quill assembly is used for supplying gaseous and liquid fuels from separate common rails to individual fuel injectors of a compression ignition engine. Each coaxial quill assembly includes a matched pair of an outer quill and an inner quill that are matched based upon a fuel system dimensional specification that causes both the inner and outer quills to sealingly engage a common conical seat of a fuel injector. During pre-installation handling, the matched pair of inner and outer quills are retained together with a retainer.

Abstract: A duel fuel quill assembly and method for assembling such an assembly for an engine are disclosed. The dual fuel quill assembly may comprise a cylinder head including a main bore and a receiving cavity, an outer quill tube, an inner quill tube nested within the outer quill tube, an adapter slidingly received inside the main bore of the cylinder head, and a manifold secured to the adapter. The adapter may be moveable between a first position and a second position and may define an axial bore configured to receive the outer quill tube and the nested inner quill tube. The manifold may define a recess configured to compress the outer and inner quill tubes against the cylinder head cavity when the adapter is in the second position.

Abstract: A quill assembly includes a first quill tube and a second quill tube nested within the first quill tube. A first compression assembly includes a first piston operably coupled to the first quill tube and fluidly communicates with the first fuel rail to apply a first piston axial force against the first quill tube inlet end, and a first spring operably coupled to the first piston and configured to apply a first spring axial force against the first quill tube inlet end. A second compression assembly includes a second piston operably coupled to the second quill tube inlet end and fluidly communicates with the second fuel rail to apply a second piston axial force against the second quill tube inlet end, and a second spring operably coupled to the second piston and configured to apply a second spring axial force against the second quill tube inlet end.

Abstract: A coaxial quill assembly is used for supplying gaseous and liquid fuels from separate common rails to individual fuel injectors of a compression ignition engine. Each coaxial quill assembly includes a matched pair of an outer quill and an inner quill that are matched based upon a fuel system dimensional specification that causes both the inner and outer quills to sealingly engage a common conical seat of a fuel injector. During pre-installation handling, the matched pair of inner and outer quills are retained together with a retainer.

Abstract: A fluid filter assembly includes a housing oriented along a vertical axis. A filter medium is disposed within the housing, oriented along the vertical axis, and has a filtration rating. The filter medium traps particulates having a particulate size greater than the filtration rating. A particulate containment space is located below the filter medium relative to the vertical axis and is defined by an inner surface of the housing and a lower end of the filter medium. A re-entrainment reduction structure, having an array of hollow cells, is positioned within the particulate containment space for receiving dislodged particulates.

Abstract: A quill assembly includes a first quill tube and a second quill tube nested within the first quill tube. A first compression assembly includes a first piston operably coupled to the first quill tube and fluidly communicates with the first fuel rail to apply a first piston axial force against the first quill tube inlet end, and a first spring operably coupled to the first piston and configured to apply a first spring axial force against the first quill tube inlet end. A second compression assembly includes a second piston operably coupled to the second quill tube inlet end and fluidly communicates with the second fuel rail to apply a second piston axial force against the second quill tube inlet end, and a second spring operably coupled to the second piston and configured to apply a second spring axial force against the second quill tube inlet end.

Abstract: A duel fuel quill assembly and method for assembling such an assembly for an engine are disclosed. The dual fuel quill assembly may comprise a cylinder head including a main bore and a receiving cavity, an outer quill tube, an inner quill tube nested within the outer quill tube, an adapter slidingly received inside the main bore of the cylinder head, and a manifold secured to the adapter. The adapter may be moveable between a first position and a second position and may define an axial bore configured to receive the outer quill tube and the nested inner quill tube. The manifold may define a recess configured to compress the outer and inner quill tubes against the cylinder head cavity when the adapter is in the second position.