Valve assembly for an injection valve and injection valve

摘要

The invention relates to a valve assembly (12) for an injection valve (10), comprising a valve body (14) including a central longitudinal axis (L), the valve body (14) comprising a cavity (18) with a fluid inlet portion (26) and a fluid outlet portion (28), a valve needle (20) axially movable in the cavity (18), the valve needle (20) preventing a fluid flow through the fluid outlet portion (28) in a closing position and releasing the fluid flow through the fluid outlet portion (28) in further positions, and an electro-magnetic actuator unit (36) being designed to actuate the valve needle (20), the actuator unit (36) comprising an armature (22), the armature (22) being axially movable in the cavity (18) and being fixedly coupled to the valve needle (20). A stop element (44) is arranged in the cavity (18) and is fixedly coupled to the valve needle (20). The stop element (44) is arranged and designed in a manner that the valve needle (20) has a maximum distance from the closing position when the stop element (44) rests on a stop surface (46) of the valve body (14). The stop surface (46) of the valve body (14) is arranged outside the range of the magnetic field of the actuator unit (36) which is effective to actuate the valve needle (20).