Siemens Vdo Automotive Corporation

Continental Automotive Italy S.p.a.

Angelo D'Arrigo

An actuator unit has a tube spring (), a piezoelectric actuator (), that is inserted into the tube spring (), a first cap (), that is connected to the tube spring () at a first free end of the tube spring () and which is adjoined by the piezoelectric actuator (), a tube-shaped body, that is connected to the tube spring () by joining and is arranged in the area of a second free end () of the tube spring (), and a device for pretensioning, that is supported by the tube-shaped body () and pretensions the piezoelectric actuator (). The actuator unit is simple and cheap to manufacture.

Actuator unit and method for manufacturing an actuator unit

A fluid injector has a housing, an actuator unit and a valve body (). The valve body () has a needle (), which closes or opens a nozzle () depending on its position and comprises a guided zone (). It further has a first part (), which is arranged in a fixed position relative to the nozzle () and has a guided zone (). It further has a second part (), which has a first guide zone (), that guides the guided zone () of the needle (), and which has a second guide zone (), that guides the guided zone () of the first part (), with the second guide zone () having a greater diameter than the first guide zone ().

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Rosignano Solvay, Italy

Angelo D'Arrigo