Actuating drive for a fuel injector in an internal combustion engine, the use for such a setting drive, as well as force substance injector arrangement of an internal combustion engine

摘要

It is an object of the invention, an actuator unit (10) for a fuel injector in an internal combustion engine, comprising an actuator housing (12) and a in the interior of the adjusting drive housing piezo-actuator (14), to improve the service life of.According to the invention, a by means of the actuator housing (12) extending compensation passage (42, 48, 40) is provided, via which a pressure balancing gas exchange between the housing interior and the atmosphere.