Patent ID: 9528610
Filing Date: 2016-12-27
CPC Classification: F02M,F16K

Claim Text:
1. A valve assembly for an injection valve, the valve assembly 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 closing position of the valve needle and releasing the fluid flow through the fluid outlet portion in further positions of the valve needle, the valve needle comprising a retainer element extending in a radial direction, and an electro-magnetic actuator unit comprising an armature and a pole piece, the armature axially movable in the cavity and configured to actuate the valve needle via the retainer element, the pole piece fixedly coupled to the valve body and comprising an inner recess, the retainer element at least partially arranged in the inner recess, wherein the pole piece comprises a stop element extending into the inner recess of the pole piece in a radial direction, the stop element has a stop surface facing the fluid outlet portion and the retainer element, the stop surface of the stop element limits the axial movement of the retainer element the stop element has an upper surface facing away from the fluid outlet portion, and a dampening element is fixedly coupled to an axial end of the valve needle facing away from the fluid outlet portion, wherein the dampening element extends radially and has a surface facing the fluid outlet portion and the upper surface of the stop element.