Patent ID: 9394868
Filing Date: 2016-07-19
CPC Classification: F02M

Claim Text:
1. A valve assembly for an injection valve having an actuator unit with an armature having an outer circumference, the valve assembly comprising: a valve body including a central longitudinal axis, the valve body having a cavity forming an inner guide surface in a guide area of the valve body, the cavity having 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 and releasing the fluid flow through the fluid outlet portion in further positions, wherein the valve needle has an upper end extending into the fluid inlet portion of the valve body, the valve needle having an inner recess extending from the upper end in a direction toward the fluid outlet portion and enabling a fluid flow inside the valve needle, the valve needle upper end includes a guide portion extending radially to the inner guide surface inside the guide area of the valve body, the guide portion of the valve needle and the guide area inside the valve body each having a circumference less than the outer circumference of the armature of the actuator unit, wherein the guide portion comprises a non-cylindrical outer radial perimeter defined at least in part by at least one first radially outward surface guided by the inner guide surface of the valve body to guide the upper end of the valve needle inside valve body, at least one second radially outward surface comprising at least one flat surface extending parallel to the longitudinal axis of the valve body, and a guide portion inner recess hydraulically coupled to the fluid inlet portion of the valve body and to the valve needle inner recess.