Fuel dosing valve e.g. piezo-injection valve, for use in motor vehicle, has hydraulic clearance-compensation unit arranged at front side of actuator, which is mounted in area that forms part of installation space filled with gas

摘要

The valve has a housing (1), and an actuator (4) attached in the housing. A hydraulic clearance-compensation unit (7) is arranged at a front side of the actuator, where the front side is opposite to a dosing opening (2). The actuator is mounted in an area (5) that forms a part of an installation space (8) filled with gas in pressurized manner. The clearance-compensation unit contains hydraulic fluid that stays under pressure. An axially flexible sealing unit is outwardly provided for hermetic sealing of the clearance-compensation unit.