Abstract: A valve body for an electromechanically operable valve is produced by providing a base element with a circumferential sidewall having a first portion, a second portion, and a third portion, the sidewall being made of a ferromagnetic material and enclosing a cavity extending along a longitudinal axis. The third portion is positioned in longitudinal direction between the first portion and the second portion. A thickness of the third portion is smaller than a thickness of the first portion and the second portion. Hardening the third portion is achieved by laser heating, which transforms a material structure of the third portion into a martensitic structure. The locally decreased thickness creates a bottleneck for a magnetic flux, and a magnetic flux bypass in the valve body is reduced due to magnetic saturation; however, a structural resistance of the valve body remains high due to the laser induced hardening.

Abstract: A valve assembly for a control valve includes a valve body having a central longitudinal axis and a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, and an electro-magnetic actuator unit configured to actuate the valve needle. The electro-magnetic actuator unit includes a pole piece fixedly arranged relative to the valve body, and an armature coupled to the valve needle and axially movable in the cavity. The electro-magnetic actuator unit includes a permanent magnet coupled to the valve body and arranged such that the permanent magnet exerts a force on the armature acting to contribute to move the valve needle into the closing position.

Abstract: A valve assembly for an injection valve may include a valve body comprising a cavity with a fluid inlet portion and a fluid outlet, and a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet in a closing position and releasing the fluid flow through the fluid outlet in further positions, the valve needle comprising a radially extending protrusion and an electro-magnetic actuator unit configured to actuate the valve needle and comprising an armature in the cavity. The armature comprises an armature cavity having a first stop surface and a second stop surface that faces the first stop surface. The protrusion of the valve needle is arranged in the armature cavity axially between the first stop surface and the second stop surface such that a relative movement between the valve needle and the armature in axial direction is limited.

Abstract: A fluid injector for a combustion engine includes a central longitudinal axis, an injection valve housing with an injection valve cavity, a valve needle axially movable within the injection valve cavity, and an electromagnetic actuator unit that actuates the valve needle. The electromagnetic actuator unit includes a pole piece fixedly coupled to the injection valve housing and an armature axially movable within the injection valve cavity and operable to displace the valve needle. The pole piece has a first contact surface and the armature has a second contact surface which are directed opposite each other, wherein one of the two contact surfaces is designed to have a contact angle of less than 90° with a given fluid,and wherein the other of the two contact surfaces is designed to have a contact angle of at least 90° with the given fluid.

Abstract: A valve body for a fluid injection valve has a longitudinal axis and includes a base body. The base body has a sidewall defining a recess extending through the base body in an axial direction. The sidewall includes a magnetic material and has at least one opening that perforates the sidewall. The valve body further includes a cover element which includes a non-magnetic material and which is arranged to sealingly cover at least one opening. In addition a fluid injection valve and a method for producing the valve body are disclosed.

Abstract: An injector for injecting fluid includes a valve needle axially moveable with respect to a valve body and operable to prevent a fluid injection in a closing position and to permit the fluid injection in an open position, an armature for moving the valve needle in a first direction from the closing position towards the open position, a needle retainer fixed to the valve needle, and an armature holder fixed to the armature, wherein the needle retainer and the armature holder are releasably coupleable such that when the armature moves in the first direction the needle is moved in the first direction by the movement of the armature holder and the needle retainer.

Abstract: The coupling device has a fuel injector cup, a first and second flange, a shell and fixing element. The fuel injector cup has a central longitudinal axis and can be hydraulically coupled to the fuel rail and engages a fuel inlet portion. The first flange is fixedly coupled to the cup and the second flange to the injector. The shell has first and second projections between which the flanges are axially arranged, and the flanges are in mechanical cooperation with the shell element to retain the injector in the cup in central longitudinal axis direction. The fixing element is arranged on a circumferential outer surface of the shell and prevents a radial movement of it relative to the flanges. The fixing element has a radially spring-loaded element which engages with a recess in the shell element to prevent an axial movement of the fixing element relative to the shell.

Abstract: A valve assembly for an injection valve includes a valve body including a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in a further position, an upper retainer arranged in the cavity and fixed to the valve needle, and an electro-magnetic actuator unit configured to actuate the valve needle, the electro-magnetic actuator unit comprising an armature, arranged in the cavity and axially movable relative to the valve needle, the armature configured to be coupled to the upper retainer when the valve needle is actuated to leave the closing position, and a permanent magnet arranged in the cavity adjacent the position of the armature when the valve needle is in its closing position.

Abstract: A valve assembly for an injection valve may include a valve body comprising a cavity with a fluid inlet portion and a fluid outlet, and a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet in a closing position and releasing the fluid flow through the fluid outlet in further positions, the valve needle comprising a radially extending protrusion and an electro-magnetic actuator unit configured to actuate the valve needle and comprising an armature in the cavity. The armature comprises an armature cavity having a first stop surface and a second stop surface that faces the first stop surface. The protrusion of the valve needle is arranged in the armature cavity axially between the first stop surface and the second stop surface such that a relative movement between the valve needle and the armature in axial direction is limited.

Abstract: A valve assembly for an injection valve may comprise a valve body including a central longitudinal axis, the valve body comprising a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet portion in a closing position and releasing the fluid flow through the fluid outlet portion in further positions, the valve needle comprising a ring element extending radially and arranged at an axial end of the valve needle facing away from the fluid outlet portion, and an electro-magnetic actuator unit being designed to actuate the valve needle. The electro-magnetic actuator unit comprises an armature axially movable in the cavity. The armature comprises a recess in which the ring element is located, and a protrusion extending radially into the recess. A spring element is arranged in the recess axially between the ring element and the protrusion of the armature.

Abstract: A valve assembly of an injection valve may include a valve body having a cavity forming an inner guide surface and having a fluid inlet portion and a fluid outlet portion, a valve needle in the cavity that controls a fluid flow through the fluid outlet portion, the valve needle having an upper end facing the fluid inlet portion and an inner recess extending from the upper end and enabling a fluid flow inside the valve needle, a guide element in the cavity is mechanically coupled to the upper end of the valve needle and extends radially to the inner guide surface of the valve body and guides the upper end of the valve needle inside the valve body. The guide element forms a one-piece extension of the valve needle with an inner recess hydraulically coupled to the fluid inlet portion and the inner recess of the valve needle.

Abstract: A fluid injector has a longitudinal axis (L) and a valve needle (12), which is axially moveable and operable to prevent a fluid injection in a closing position and to permit the fluid injection in further positions. The fluid injector also has an armature (14) which is mechanically coupled to the valve needle (12). Furthermore, the fluid injector has a solenoid assembly (30) which has at least a first and second coil (34, 36) and which is operable to magnetically actuate the armature (14) via an electrical signal (V) applied to at least one predetermined assortment of the at least two coils (34, 36).

Abstract: An injection valve (62) has an injection body (38) with a first cavity (7), wherein a valve body (4) is at least partially disposed and wherein an armature collar (28) is axially movable. The valve body (4) has a second cavity (8), wherein a valve needle (10) is axially movable. An armature (12) is axially movable at least partially within the first cavity (7) and has a first cylindrical portion (32) and a second cylindrical portion (34), which is mechanically coupled to the valve needle (10). A coil assembly (40) is operable to magnetically actuate the armature (12) and the valve needle (10). The armature collar (28) partially takes in the second cylindrical portion (34). An armature collar spring (20) is adopted to supply the armature collar (28) with a spring load to push the armature collar (28) towards the first cylindrical portion (32).

Abstract: A coupling arrangement for coupling a fuel injector to a fuel rail of a combustion engine, has a fuel injector cup having a central longitudinal axis and is coupled to the fuel rail at a first axial end area of the fuel injector cup, a housing of the fuel injector being arranged at the central longitudinal axis facing a second axial end area of the fuel injector cup, an O-ring seal being arranged between the housing and the fuel injector cup at an axially overlapping area of the fuel injector cup and the housing, a back-up ring being arranged at least partly circumferentially the housing such as to prevent the O-ring seal to be released from the housing, and a separating element being arranged at least partly circumferentially the housing between the O-ring seal and the back-up ring to prevent a contact of the O-ring seal with the back-up ring.

Abstract: Coupling device (60) for mechanically and hydraulically coupling a fuel injector (20) to a fuel rail (18) of a combustion engine (22), the fuel injector (20) having a central longitudinal axis (L) and an injection nozzle (31), having a fuel injector cup (32) being designed to be hydraulically coupled to the fuel rail (14) and to engage a fuel inlet portion (24) of the fuel injector (20), and a spring element (36) being part of the fuel injector (20) and being designed to be in a snap-in engagement with the fuel injector cup (32) to retain the fuel injector (20) in the fuel injector cup (32) in direction of the central longitudinal axis (L) facing towards the injection nozzle (31).

Abstract: A coupling arrangement for coupling an injection valve to a cylinder head of a combustion engine has a housing with a central longitudinal axis coupled to a fuel rail at a first axial end area and to a valve body at a second axial end area of the housing, and the valve body being arranged at the central longitudinal axis having at least one first protrusion arranged facing a second axial end area of a first ring element. Furthermore, the first ring element is arranged at least partly circumferentially the valve body at the first protrusion, wherein at a first axial end area of the first ring element the first ring element is in contact with the housing at the second axial end area and at the second axial end area the first ring element rests on the cylinder head. The first ring element has a plastic.

Abstract: A valve assembly (80) of an injection valve (82) has a valve body (4) including a central longitudinal axis (L), the valve body (4) having a cavity (8) forming an inner surface (18) of the valve body (4), the cavity (8) having a fluid inlet portion (42), and a fluid outlet portion (44), a valve needle (10) axially movable in the cavity (8), the valve needle (10) preventing a fluid flow through the fluid outlet portion (44) in a closing position and releasing the fluid flow through the fluid outlet portion (44) in further positions, the valve needle (10) and/or the inner surface (18) of the valve body (4) having a surface layer (48) with a tungsten carbide layer (70) and a carbon layer (72).

Abstract: The coupling device has a fuel injector cup, a first and second flange, a shell and fixing element. The fuel injector cup has a central longitudinal axis and can be hydraulically coupled to the fuel rail and engages a fuel inlet portion. The first flange is fixedly coupled to the cup and the second flange to the injector. The shell has first and second projections between which the flanges are axially arranged, and the flanges are in mechanical cooperation with the shell element to retain the injector in the cup in central longitudinal axis direction. The fixing element is arranged on a circumferential outer surface of the shell and prevents a radial movement of it relative to the flanges. The fixing element has a radially spring-loaded element which engages with a recess in the shell element to prevent an axial movement of the fixing element relative to the shell.

Abstract: The injection valve has a housing and a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity, the valve needle preventing a fluid flow in a closing position and releasing the fluid flow in further positions, and a spring element mechanically coupled to the needle and designed to exert an axial force on the needle. The adjusting and filter arrangement is arrangeable in the cavity between the inlet and outlet portion and has a filter element formed as a filtration body block and designed to filter the fluid, an adjusting element rigidly coupled to the housing and to preload the spring element and formed as an outer casing for the filter element, and a spring guiding element extending in axial direction and engaging the spring element, wherein the adjusting element and the spring guiding element form a one-piece element.

Abstract: A Fluid injector has a housing (8) with a cavity and a coil (34) being arranged in the cavity. A valve needle (12) is arranged axially moveable along a predetermined axis (L) of the fluid injector. An armature (14) is arranged axially moveable along the predetermined axis (L) and is mechanically coupled to the valve needle (12). A reluctance element (42) is designed to have a permeability which is much smaller than the permeability of the housing (8) and is arranged such that a magnetic circuit with the housing (8) and the armature (14) also has the reluctance element (42).