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.

This invention refers to an optimized structure of a high flow fuel dosing valve applied to automobiles in general, particularly to high power racing cars with the purpose of opening and closing an orifice for fuel injection in internal combustion engines for power gain through an innovative and improved mechanical constructiveness of the coil body (1), coil (2), spring (3), needle (4), guide ring (5), lock (6), seat (7), sieve (8), needle body (9) and o-ring (10), with advantages of greater and faster fuel flow, durability, efficiency and power gain.

This invention refers to an optimized structure of a high flow fuel dosing valve applied to automobiles in general, particularly to high power racing cars with the purpose of opening and closing an orifice for fuel injection in internal combustion engines for power gain through an innovative and improved mechanical constructiveness of the coil body (1), coil (2), spring (3), needle (4), guide ring (5), lock (6), seat (7), sieve (8), needle body (9) and o-ring (10), with advantages of greater and faster fuel flow, durability, efficiency and power gain.

A fuel supply valve for a slurry fuel injector valve comprises a fuel inlet in fluid communication with a slurry fuel reservoir. A fuel outlet is in fluid communication with a nozzle of the fuel injector valve. A pump chamber port is in fluid communication with a pump chamber of the fuel injector valve. A valve gate is moveable between a first position wherein the fuel inlet is in fluid communication along a first slurry fuel flow path with the pump chamber port and a second position wherein the fuel outlet is in fluid communication along a second slurry fuel flow path with the pump chamber port. Wherein the valve gate is arranged to not substantially exert a force opposing a flow on the slurry fuel into the valve chamber when the valve gate moves between the second position and the first position and/or between the first position and the second position.

An injector component of an injector for introducing a fluid is described as including a base body, a coating on at least one first end face of the base body, the coating having a maximum, which lies on an outer half of the base body, and an outer lateral surface of the base body does not have any coating.

An electromagnetic valve control unit for detecting operation of an electromagnetic valve on the basis of a drive voltage or a drive current applied to the electromagnetic valve. The electromagnetic valve control unit includes an A/D converter, a filter, and a detection unit. The A/D converter converts the drive voltage or the drive current into a digital signal. The filter has a gain of about zero at a predetermined frequency. The detection unit detects operation of the electromagnetic valve on the basis of an output of the filter upon input of the digital signal into the filter.

Disclosed is a valve needle for a needle valve of a slurry fuel injector valve, the valve needle comprising: a tip for abutting a needle valve seat of the needle valve; a sealing portion for location in a bore of the needle valve; and a fuel chamber portion between the tip and the sealing portion, wherein the fuel chamber portion is for location in a needle fuel chamber of the needle valve; wherein a surface of the sealing portion of the valve needle comprises at least one groove and wherein at least part of the or each groove extends in a direction that is non-perpendicular to an axial direction of the valve needle.

An injector component of an injector for introducing a fluid is described as including a base body, a coating on at least one first end face of the base body, the coating having a maximum, which lies on an outer half of the base body, and an outer lateral surface of the base body does not have any coating.

A fuel injector includes a housing extending along an injector axis. A pintle has an axially extending pintle shaft and a radially projecting annular collar with a collar surface, the pintle being axially moveable between an open position and a closed position. An armature is axially guided in the housing between a proximal position and a distal position, the armature having an axial through-hole in which the pintle shaft is guided and an armature surface which engages the collar surface, thereby moving the pintle into the open position when the armature moves to the proximal position. A first resilient member biases the pintle in the distal direction and a second resilient member biases the armature in the distal direction. The armature surface and the collar surface are slanted with respect to the injector axis and one of the armature surface and the collar surface is convex curved.

A fuel injector including an especially precisely aligned valve needle. The fuel injector includes an excitable actuator for actuating a valve closure element, which forms a sealing seat together with a valve seat surface formed on the valve seat body, and has injection orifices, which are developed downstream from the valve seat surface. The valve closure element is spherical and, as a part of a valve needle which is axially movable along a valve longitudinal axis, is fixedly connected to a pin-shaped solid valve needle shaft. A contact region of the valve needle shaft and the valve closure element is situated radially outside the valve longitudinal axis and surrounds it in the form of a ring. The fuel injector is particularly suitable for the direct injection of fuel into a combustion chamber of a mixture-compressing internal combustion engine having externally supplied ignition.