Abstract: A valve assembly suitable in particular for a fuel injection system of an internal combustion engine is proposed, which includes an adjustably disposed valve element, an actuator unit, in particular a piezoelectric actuator unit, for adjusting the valve element, and a hydraulic force transmission chamber disposed in the force transmission path between the actuator unit and the valve element. For diverting at least one hydraulic filling stream, to be delivered to the force transmission chamber for filling it, from a hydraulic mainstream, a hydraulic pressure distributor assembly (50b, 52b) is provided, which has a conduit system (46b, 48b) that is embodied in a conduit housing (14b) and has both a main conduit (46b), carrying the hydraulic mainstream, and at least one filling conduit (48b), branching off from the main conduit (46b) and carrying the hydraulic filling stream.

Abstract: A pilot control valve of a fuel injection valve, having a first housing part which forms a well with walls parallel to an axis (z-z). A second housing part with a plug-in portion which is introduced in form-locking fashion into the well up to a set-point position. The first and second housing parts jointly define a chamber in which a valve closing member is displaceable along the axis in a chamber between a closed position, in which the valve closing member rests on a pilot control valve seat, and an open position, and the stroke of the valve closing member between the closed and the open positions is defined by the set-point position. The plug-in portion is fixed in the set-point position on the walls of the well that are parallel to the axis (z-z). It is thus possible for the set-point position, which is equivalent to a desired switching performance of the pilot control valve, to be adjusted accurately before a fixation.