Monolithic multilayer piezostack e.g. piezo actuator, for e.g. fuel injector, has inner metallization, whose contacting is made by inner electrode, where electrode is in form of glass, paste, gel, viscous, semi-fluid or liquid

摘要

Piezostack has an inner metallization (20), whose direct electrical contacting (42) is made by an inner electrode (40). The inner electrode has an electrically conducting fluid with high surface voltage, where the inner electrode is powdered or granulated in the form of glass, paste, gel, viscous, semi-fluid or liquid. The electrical contacting of the inner electrode takes place positively by a contact unit (60) that is immersed or pushed into the inner electrode. Independent claims are also included for: (a) an injector such as a fuel injector including a multilayer piezostack (b) an injection system that such as a common rail injection system including an injector (c) an internal combustion engine including an injection system.