Valve assembly for an injection valve and injection valve

An injection valve comprising:

• a valve assembly comprising:
• a valve body including a central longitudinal axis and a cavity having a fluid inlet portion and a fluid outlet portion,
• a valve needle axially movable in the cavity to prevent a fluid flow through the fluid outlet portion in a closing position of the valve needle and to allow the fluid flow through the fluid outlet portion in further positions of the valve needle, and
• a guiding device arranged in the cavity and configured to guide the valve needle relative to the valve body,
• wherein the guiding device comprises a first guide element including a first hollow cylinder fixedly coupled to the valve body and a second guide element including a second hollow cylinder fixedly coupled to the valve needle,
• wherein the first hollow cylinder has an inner diameter on an internal surface larger than an outer diameter on an external surface of the second hollow cylinder leaving a radial gap between the internal surface of the first guide element and the external surface of the second guide element when the second guide element moves through the first guide element,
• wherein the first hollow cylinder has an external surface with an outer diameter larger than the inner diameter of the first hollow cylinder,
• wherein the first hollow cylinder comprises a first permanent magnet with a first magnetic field having a first pole pointed radially inward on the internal surface of the first hollow cylinder and a second pole pointed radially outward on the external surface of the first hollow cylinder, and
• the second hollow cylinder comprises a second permanent magnet with a second magnetic field having a first pole pointed radially inward on an internal surface of the second hollow cylinder and a second pole pointed radially outward on the external surface of the second hollow cylinder,
• wherein the first pole of the first magnetic field and the second pole of the second magnetic field repel each other across the gap;
• and
• an electro-magnetic actuator unit configured to actuate the valve needle.