VALVE ASSEMBLY WITH A PARTICLE RETAINER ELEMENT AND FLUID INJECTION VALVE

摘要

A valve assembly (10) and a fluid injection valve (1) are disclosed. The valve assembly comprises a valve body (100) having a longitudinal axis (L) and a cavity (110), a valve needle (200), and an armature (300). The cavity (110) has a first portion (112) accommodating the armature (300) and being limited in axial direction towards a fluid outlet end (130) by a bottom surface (114) having a central opening (116). A second portion (118) of the cavity (110) extends from the central opening (116) towards the fluid outlet end (130) . A shaft (240) of the valve needle (200) extends through the opening (116) into the second portion (118). A particle retainer element (400) is positioned in the cavity (110) such that it bears on the bottom surface (114), circumferentially surrounds the shaft (240) of the valve needle (200) and overlaps with the opening (116).