Valve assembly for an injection valve and injection valve

An injection valve for a combustion chamber of a combustion engine, the injection valve comprising:

• a valve assembly comprising:
• a valve body comprising 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 of the valve needle and allowing the fluid flow through the fluid outlet portion in further positions of the valve needle,
• an electro-magnetic actuator unit configured to actuate the valve needle, the actuator unit comprising an armature that is axially movable in the cavity, wherein the armature comprises:
• a main body, and
• a hydraulic damper fixedly coupled to the main body and having an inner surface facing the main body, the inner surface configured to contact the valve needle in certain positions of the valve needle,
• wherein the hydraulic damper comprises:
• a first opening and at least one second opening, wherein the valve needle extends through the first opening and the second opening provides a fluid passage from the fluid inlet portion to the fluid outlet portion, and
• a side surface extending in a direction of the longitudinal axis, wherein the side surface is completely in contact with the main body.

A valve assembly for an injection valve, comprising:

• a valve body comprising 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 of the valve needle and allowing the fluid flow through the fluid outlet portion in further positions of the valve needle,
• an electro-magnetic actuator unit configured to actuate the valve needle, the actuator unit comprising an armature that is movable in the cavity, wherein the armature comprises:
• a main body, and
• a hydraulic damper fixedly coupled to the main body and having an inner surface facing the main body, the inner surface arranged to be in contact with the valve needle in certain positions of the valve needle,
• wherein the hydraulic damper comprises a first opening and at least one second opening, wherein the valve needle extends through the first opening and the second opening provides a fluid passage from the fluid inlet portion to the fluid outlet portion, and
• an armature spring arranged inside the main body axially between the main body and the valve needle, wherein the armature spring is configured to provide a force acting on the valve needle to bring the valve needle in contact with the inner surface of the hydraulic damper.