An injection hole body has injection holes to inject fuel. A valve body forms a fuel passage with an inner surface of the injection hole body to communicate with inflow ports of the injection holes. The valve body opens and closes the fuel passage by being seated on and unseated from a seating surface of the injection hole body. An inflow port gap distance is a gap between the valve body and the inflow ports along a center axis of the valve body. An inter-injection hole distance is a distance between inflow ports, which are adjacent to each other, among the inflow ports placed around the center axis. The inter-injection hole distance is smaller than the inflow port gap distance in a state where the valve body is unseated from the seating surface and is at a farthest position in its movable range.

A fuel filter for a fuel system includes a cylindrical frame having a pair of circular openings at longitudinal ends of the frame and a filter membrane, with the frame including a circumferential wall having an aperture and the filter membrane being disposed about an outwardly facing side of the wall and over the aperture. The frame includes tabs, such as deformable tabs, disposed adjacent at the openings for retaining the filter membrane on the frame, and the filter membrane overlaps itself when circumferentially disposed about the wall.

A multipart fuel filter element includes a cartridge body having a plurality of through bores radially offset with respect to a centerline. An inlet end cap adjacent a first cartridge face includes an inlet aperture centrally aligned with the centerline and a plurality of distribution apertures aligned with and directing fuel to the plurality of through bores. An outlet end cap adjacent a second cartridge face includes an outlet aperture also aligned with the centerline and a plurality of reception aperture that are aligned with the through bores to receive fuel.

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 debris shield in the high pressure fuel supply passage of a fuel injector, upstream of a bypass branch line leading to a control valve, comprising a rigid tube with a central passage aligned with the fuel supply passage and narrow flow paths through which high pressure fuel is filtered for removal of debris before delivery to the branch line, wherein the tube has opposed ends that are sealingly compressed between spaced apart stop surfaces along the fuel supply passage. The flow paths can be can be bores, slots, or circuitous transverse flow paths formed by woven or ribbon wrapped mesh.

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 combined assembly for filtering and calibrating a fuel injector arranged in an internal combustion engine, the combined filtration and calibration assembly extending along a longitudinal axis and comprising a calibration sleeve provided with a longitudinal bore and defining a multitude of filtration holes. The combined filtration and calibration assembly has a calibrated opening in the bore.

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 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 filtration device may include a securement section and a filter. The securement section may be configured to be threadably secured to and extend within an interior of a common rail fuel injector. The securement section may include a passage for fuel. The passage may extend in a direction along a central axis of the securement section. The filter may be configured to be positioned within the interior of the common rail fuel injector to filter the fuel flowing through the common rail fuel injector. The filter may include a plurality of holes that are fluidly connecting to the passage of the securement section. The diameter of the filter may be smaller than a diameter of the securement section.