Valve assembly for an injection valve and injection valve

摘要

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.

主权项

1. Valve assembly for an injection valve, comprising:
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 closed position and releasing the fluid flow through the fluid outlet portion in further positions, the valve needle comprising a radially extending protrusion, and an electro-magnetic actuator unit being designed to actuate the valve needle, the electro-magnetic actuator unit comprising an armature axially movable in the cavity, wherein the armature comprises an armature cavity having a first stop surface and a second stop surface, wherein the second stop surface substantially faces the first stop surface, wherein 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, wherein the armature comprises an armature main body and an armature retainer, the armature retainer being fixedly coupled to the armature main body and being shaped such that the armature retainer and the armature main body form the armature cavity, and wherein the valve assembly comprises a spring element arranged in the armature cavity axially between the protrusion of the valve needle and the armature retainer.