VALVE ASSEMBLY FOR AN INJECTION VALVE AND INJECTION VALVE

摘要

Valve assembly (14) for an injection valve (10), comprising a valve body (20) comprising a central longitudinal axis (L) and a cavity (24) with a fluid inlet portion (26) and a fluid outlet portion (28), a valve needle (22) axially movable in the cavity (24), the valve needle (22) preventing a fluid flow through the fluid outlet portion (28) in a closing position and releasing the fluid flow via a main fluid line (58) from the fluid inlet portion (26) to the fluid outlet portion (28) in further positions, a member (23) being fixedly associated to the valve needle (22) and having a surface (23a) facing the fluid outlet portion (28), a first chamber (40) embodied in the cavity (24) with the surface (23a) abutting the first chamber (40), a second chamber (41) being part of the main fluid line (58), and a one-way-valve (44). The oneway-valve (44) is hydraulically arranged between the first chamber (40) and the second chamber (41) and is designed to prevent a fluid flow through a first fluid path (60) between the first chamber (40) and the second chamber (41) in a closing position of the one-way-valve (44) and to release a fluid flow through the first fluid path (60) between the first chamber (40) and the second chamber (41) in further positions of the one-way-valve (44).