The invention relates to a method for producing a metering valve (1) for a fluid, in particular for a liquid and/or gaseous fuel, comprising a preferably plate-shaped valve seat element (2) having at least one throughflow opening (3) for the liquid and/or gaseous fuel, a lift-movable valve disk (4) that sealingly interacts with the valve seat element (2) for releasing and closing the at least one throughflow opening (3), and a stroke stop element (5) having an annular stroke stop surface (6) for limiting the stroke of the valve disk (4). According to the invention, the stroke stop element (5) is axially pretensioned in the direction of a stroke adjustment ring (7) surrounding the valve disk (4). In order to finely adjust the stroke of the valve disk (4), the axial pretensioning force is altered, whereby the stroke stop element (5) is deformed. The invention further relates to a metering valve (1) for a fluid.

A fuel valve for injecting fuel into the combustion chamber of a large two-stroke self-igniting internal engine combustion engine, with a valve needle that is resiliently biased towards a valve seat. The effective pressure surface that causes fuel pressure to urge the valve needle in the opening direction increases significantly when the valve needle has lift from the valve seat. A supplementary effective pressure surface is provided on the valve needle. The supplementary effective pressure surface creates a force urging the valve needle towards the valve seat when the supplementary effective pressure surface is exposed to fuel pressure.

The invention relates to an injection nozzle (1) for fuels, comprising a nozzle body (2), in which a pressure chamber (4) that can be filled with fuel under high pressure is formed, in which pressure chamber a piston-shaped nozzle needle (3) is arranged in such a way that the nozzle needle can be moved longitudinally. A sealing surface (6) is formed at one end of the nozzle needle (3) and an end face (9) is formed at the opposite end, wherein the sealing surface (6) interacts with a nozzle seat (5) in order to open and close at least one injection opening (8). A control chamber (10) that can be filled with fuel under changing pressure is bounded by the end face (9) of the nozzle needle (3) such that a force can be applied to the end face (9) in the direction of the nozzle seat (5) by means of the hydraulic pressure. The nozzle needle (3) has an elastic longitudinal segment (25), which has a longitudinal stiffness of less than 40,000 N/mm.

A fuel injector with inlet and discharge ends includes a fuel tube through which fuel is admitted to a fuel passage extending to the discharge end. A valve element reciprocates against and away from a valve seat to prevent or allow fuel discharge. A calibration tube includes first and second ends and defines a portion of the fuel passage through which fuel must pass to the discharge end, the second end defining a spring seat engaging a spring and biasing the spring against the valve element. A fuel filter filters all fuel passing to the discharge end, and provides restriction of a first magnitude. The calibration tube includes a pressure pulsation damping orifice fluidly between the fuel filter and the discharge end through which fuel must pass to the discharge end, the pressure pulsation damping orifice provides restriction of a second magnitude which is greater than the first magnitude.

An injector for injecting a fluid. In injector includes a filter for filtering the fluid to be injected. The filter is arranged in a tubular section of the injector. The filter has a sleeve and a filter body. The sleeve holds the filter body in the tubular section. The sleeve has a securing section and a holding section. The securing section is connected to the filter body. The holding section holds the sleeve in the tubular section of the injector. The filter body or parts of the filter body are arranged exclusively within the securing section.

A fuel injection valve for fuel injection systems of internal combustion engines, in particular for directly injecting fuel into the combustion chamber of an internal combustion engine. The fuel injection valve includes a solenoid, an armature acted upon in a closing direction by a return spring through the solenoid, and a valve needle connected to the armature in force-locking fashion for actuating a valve closing body, which together with a valve seat surface forms a sealing seat. An adjustment element for adjusting the spring force of a return spring is arranged in a connecting sleeve serving the inlet side fuel supply. The adjustment element is bounded outwardly by a thin-walled sleeve. The sleeve includes an axially aligned sleeve jacket and a radially extending sleeve base. The wall thickness of the sleeve base is reinforced relative to the wall thickness of the sleeve jacket of the sleeve.

A valve for metering a fluid is described, which is used, in particular, as a fuel injector for internal combustion engines, including an electromagnetic actuator and a valve needle actuatable by the actuator, an armature of the actuator being guided on valve needle, a stop element which limits a movement of the armature relative to the valve needle being situated on the valve needle, and the armature including a spring receptacle which is open toward the stop element and in which a spring supported on the stop element is inserted. The valve needle is guided via the armature and/or the stop element along a longitudinal axis of a housing. Furthermore, as viewed along the longitudinal axis, a length of the spring receptacle is smaller than a spring length of the spring in the non-actuated initial state.

A coil assembly includes an electric coiling included in an overmold, the coiling being suitable to drive the control valve of a fuel injector. The coil assembly is provided with a longitudinal bore suitable for receiving a spring and with an adjusting member for the setting of the spring which can be moved from outside the injector, the adjusting member forming a transfer of movement such that the movement of the adjusting member from outside the injector is transformed into a compression of the spring.

An object of the present invention is to provide a fuel injection valve configured to suppress bouncing of a valve element that is caused as a result of the valve element being rendered elastic when the valve element collides with a valve seat. The fuel injection valve of the present invention includes the valve element configured to come into contact with the valve seat for closing an injection hole and to separate from the valve seat for unclosing the injection hole, an elastic member urging the valve element toward the valve seat, a movable iron core disposed to be in and out of contact with the valve element, a fixed iron core disposed to be opposed to the movable iron core, and a coil configured to generate electromagnetic force for moving the movable iron core. At least one lower rigidity part having reduced rigidity per axial unit length is provided between a surface where urging force of the elastic member is transmitted to the valve element and a seat part whereat the valve element comes into contact with and separates from the valve seat.

A fuel delivery assembly for an internal combustion engine, including an injector cup, a fuel injector received therein, and a spring clip is disclosed. The injector cup has a circumferential wall with an external shoulder. The fuel injector has a shoulder which is axially spaced apart from the injector cup. The spring clip has a base portion with two radially compliant webs bearing against the shoulder of the circumferential wall and being in force-fit engagement with the circumferential wall. The spring clip has an axially compliant portion bearing against the shoulder of the fuel injector and being elastically deformable to bias the fuel injector in axial direction from the upper end towards the lower end.