| 摘要 |
The invention relates to a valve assembly (11) , with a valve body (14) including a central longitudinal axis (L), the valve body (14) comprising a cavity (18) with a fluid inlet portion (42) and a fluid outlet portion (40), a valve needle (20) axially movable in the cavity (18), the valve needle (20) preventing a fluid flow through the fluid outlet portion (40) in a closing position and releasing the fluid flow through the fluid outlet portion (40) in further positions, a guide (23) being arranged in the cavity (18) and being fixedly coupled to the valve needle (20), an electro-magnetic actuator unit (36) being designed to actuate the valve needle (20), the actuator unit (36) comprising an armature (22) which is arranged in the cavity (18) and is axially moveable relative to the valve needle (20), the armature (22) being designed to be coupled to the guide (23) when the valve needle (20) leaves the closing position and the armature (22) being designed and arranged to mechanically decouple from the guide (23) due to its inertia when the valve needle (20) reaches the closing position, and an armature spring (46) being arranged in the cavity (18) and being coupled to the armature (22) axially adjacent to the armature (22). The armature spring (46) is arranged to provide a force to the armature (22) contributing coupling the armature (22) with the valve needle (20). A block-shaped stop element (50) is arranged in the cavity (18) axially adjacent to the armature (22) and is fixedly coupled to the valve body (14). The stop element (50) is designed directly to limit the axial movement of the armature (22). |
