A fuel injector for gaseous fuel is provided. The fuel injector includes a valve assembly with a first valve and a second valve. The first valve is actively controlled to permit and prohibit gaseous fuel flow through the first injector. The second valve is spaced from the first valve and passively controlled to open in response to the gaseous fuel flow though the first valve, and to close when the gaseous fuel flow is terminated by closing the first valve.

A fluid injector is shown and described, including an injector housing and an armature which is coupled to a valve needle. A first bellow surrounds a first space. A first axial end of the first bellow is connected to the injector housing and a second axial end of the first bellow is connected to a first axial side of the armature. A second bellow surrounds a second space. A first axial end of the second bellow is connected to a second axial side of the armature and a second axial end of the second bellow is connected to the housing.

An injector, including: a moveable armature having a bore and upper and lower control surfaces; a lower housing including a bore and upper and lower stationary control surfaces; and a flow geometry defined along an exterior of the armature. The armature includes a transverse flow path fluidly coupled with the armature bore and the flow geometry. The lower housing includes a transverse flow path fluidly coupled with the lower housing bore. Upon moving the armature from a first position to a second position, a first flow path is formed between the flow geometry and the lower housing transverse flow geometry through a space between the lower stationary control surface and the lower armature control surface, and a second flow path is formed between the armature bore and the lower housing transverse flow geometry through a space between the upper stationary control surface and the armature upper control surface.

Embodiments of the apparatus relate to a tool configured to repair and recondition a fuel injector seat. The tool includes a body having a working end and a rotary end, a rod extending through the body, wherein a first portion of the rod is exposed at or near the rotary end and a second portion of the rod is exposed at or near the working end, and a machining bit attached to the rod at or along the second portion of the rod, wherein the machining bit is configured to perform work on a fuel injector seat.

A fuel injector for an internal combustion engine, which is configured for feeding fuel to a cylinder, having a housing, via which the fuel injector can be mounted to the internal combustion engine, a valve body engaging with a valve stem interacting with a valve seat, which can be moved relative to the valve seat for opening a fuel flow, having a bellows sealing element, which with a first end engages with the valve stem and with a second end with the housing, a sleeve body, which at least partly decouples the bellows sealing element from a fuel flow through the fuel injector and from fuel pressure pulsations.

A dual fuel common rail engine supplies pressurized natural gas and liquid diesel fuel at different pressures through a co-axial quill assembly for direct injection from a single fuel injector into an engine cylinder. Pressure waves in the gaseous fuel common rail are damped in a pressure damping chamber of the co-axial quill assembly to promote consistent gaseous fuel injection rates and quantities from the fuel injector.

In a fuel injection apparatus, a movable core includes a large-diameter portion and a small-diameter portion, and a fixed core, includes a large-diameter recessed portion and a small-diameter recessed portion in which the large-diameter portion and the small-diameter portion are respectively slidable. While a coil is energized, a first magnetic circuit is formed allowing a magnetic flux to flow between a large-diameter-portion corner of a large-diameter portion and a large-diameter recessed-portion corner of a large-diameter recessed portion, and a second magnetic circuit is formed allowing a magnetic flux to flow between a small-diameter-portion corner of a small-diameter portion and a small-diameter recessed-portion corner of a small-diameter recessed portion.

A system according to the present invention provides for a liquid injected propane fuel system for internal combustion engines which provides for a fuel pump assembly, a base tank valve adaptor, a distribution assembly, and rail assemblies; a first embodiment of the liquid injected propane fuel system may provide for proportional fuel injection, a second embodiment may provide for direct fuel injection providing for at least substantial reduction in evaporation (EVAP) emissions, is disclosed, a third embodiment of the liquid injected propane fuel system may provide for a combination of proportional fuel injection and direct fuel injection; the invention comprising at least one of a fuel tank, an external fuel tank, a distribution block, a fuel rail and a ECU.

A fuel injector for gaseous fuels, the fuel injector comprising: an injection nozzle having a tip region that is shaped to define an annular valve seat that extends about a central outlet opening; and an outward opening injection valve needle slidably received in the injection nozzle, and operable to move between closed and open positions, the outward opening injection valve needle comprising a valve stem that defines a valve axis and a valve head extending from the valve stem, wherein the valve head comprises: a circumferential sealing region configured to seal against the valve seat and close the central outlet opening in the closed position and to define an annular gap with the valve seat in the open position, and a circumferential fuel guide region that is located downstream from the circumferential sealing region.

The invention relates to an injector for injecting fuel, preferably for injecting a gaseous fuel, in particular hydrogen, comprising a fuel supply line for introducing a highly pressurized gaseous fuel, an active valve which can be actively shut off and which is designed to close or release at least one passage on a first face of a valve plate in order to selectively release or interrupt a fluidic connection between the fuel supply line and a region which is downstream of the first face of the valve plate, and a passive valve which is arranged downstream of the valve plate and can be passively switched to a closing or releasing state as a result of different pressure ratios upstream and downstream of the passive valve.