Various embodiments include an adjusting filter for a fluid injector valve comprising: an elongate filter sleeve having an inlet and an outlet; and a filter insert. The filter sleeve includes a filter accepting section at the inlet, a press-fit section, a centring section at the outlet, and a spring engaging surface surrounding the outlet. The press-fit section is arranged between the filter accepting section and the centring section. The filter insert is arranged in the filter accepting section. The filter accepting section has an outer diameter smaller than an outer diameter of the press-fit section. The centring section has an outer diameter smaller than the outer diameter of the press-fit section.

A common rail system for a fuel injection system of an internal combustion engine, the common rail system comprising: a high pressure pump for receiving fuel from a fuel tank; at least one fuel injector for delivering fuel to the internal combustion engine; a common rail for receiving fuel from the high pressure pump through a flow path of the common rail system that connects the high pressure pump to the common rail, the common rail comprising a fuel reservoir in fluid communication with a common rail inlet and in fluid communication with the one or more fuel injectors; and a filter provided in the flow path. The filter is configured to filter fuel so as to prevent particulate matter from entering the common rail. The common rail system comprises only one filter.

A filtration device includes a guide member and an adjustable ring assembly. The guide member is configured to be secured to an interior of a fuel device and includes a plurality of holes to guide fuel therethrough. The adjustable ring assembly is configured to be positioned within the interior of the fuel device to filter the fuel flowing through the fuel device. The adjustable ring assembly has a plurality of stackable rings that are concentrically aligned. A junction between a first ring and a second ring, of the plurality of stackable rings, defines a plurality of openings that fluidly communicate with the plurality of holes. The plurality of openings are smaller, respectively, than the plurality of holes.

A fuel flow limiter assembly includes a limiter body forming a central bore, and including a shutoff piston within the central bore having a closing hydraulic surface exposed to a fluid pressure of the fuel inlet, and being movable from an open position, to a closed position based on a fuel pressure drop from a fuel inlet to a fuel outlet in the limiter assembly. A fuel filter is resident in the limiter assembly and supported in a connector coupled to the limiter body. The fuel filter is elongate and projects from the connector into a fuel flow path from the fuel inlet to the fuel outlet.

A fluid filtering device may have a body that include a fluid collection portion, a filtering chamber, and a passthrough bore. The fluid collection portion may be configured to collect fluid supplied to the fluid filtering device. The filtering chamber may be in fluid communication with the fluid collection portion. The filtering chamber may have an entrance portion, an exit portion, and a fluid filter. The filtering chamber may be configured to filter the fluid supplied to the fluid filtering device. The passthrough bore may be in fluid communication with the filtering chamber and may be separate from the fluid collection portion such that fluid flowing from the fluid collection portion flows into the filtering chamber, and the fluid flowing from the filtering chamber flows into the passthrough bore.

A fuel injector assembly includes a fuel injector and an annular filter coupled with the fuel injector, the annular filter being snap-fitted with one of a nozzle case or an injector body of the fuel injector and slip-fitted with the other of the nozzle case or the injector body. The annular filter has a perforated wall forming a filtration screen covering an actuation fluid inlet formed in the nozzle case and positioned upstream of the actuation fluid inlet to trap particulates in incoming actuation fluid.

An engine head assembly includes a plurality of fuel injectors each positioned within a fuel injector bore in the engine head, and each being fluidly coupled with a fluid conduit. Each fuel injector includes a valve assembly positioned within a fuel injector case that includes an elongate body having an opening. A filter sleeve having a particle-blocking perforation array structured to block particles is press fit on the fuel injector case to form a fluid flow path from the fluid conduit into the fuel injector case.

Embodiments are directed to fuel injectors for internal combustion engines (e.g. engines with reciprocating pistons and with compression-ignition or spark-ignition, Wankel engines, turbines, jets, rockets, and the like) and more particularly to improved nozzle configurations for use as part of such fuel injectors. Other embodiments are directed to enabling fabrication technology that can provide for formation of nozzles with complex configurations and particularly for technologies that form structures via multiple layers of selectively deposited material or in combination with fabrication from a plurality of layers where critical layers are planarized before attaching additional layers thereto or forming additional layers thereon. Other embodiments are directed to methods and apparatus for integrating such nozzles with injector bodies.

A fuel injector for a common rail fuel system includes an energizer section, an injector section, and control section axially disposed along an injector axis. To control and injection event, the control section includes a control orifice manifold that has a plurality of control orifices and control passages to distribute high pressure fuel with the injector assembly. To prevent plugging of the control orifices and passages, an internal filter element with a plurality of filtration orifices is located in proximity to the control orifice manifold.

A filter for filtering hydraulic fluid in a hydraulically actuated fuel injector. The filter includes a first disc structure and a second disc structure disposed axially spaced apart from the first disc structure. The second disc structure is also disposed parallel to the first disc structure. The filter further includes an intermediate structure extending from the first disc structure to the second disc structure. The intermediate structure includes a first surface and a second surface disposed opposite and parallel to the first surface. The intermediate structure defines a plurality of passages extending from the first surface to the second surface. Each of the plurality of passages is perpendicular to a longitudinal axis of the filter.