Controller with an actuator of controllable length and device for transmitting the deflection of an actuator

US6194812A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wendelin Klugl · Dietenhofen, DE
• Hinrich Kruger · Regensburg, DE
• Johannes Fitzner · Bernhardswald, DE
• Raimondo Giavi · Munich, DE
• Karl Kirchweger · Graz, AT
• Jurgen Rink · Schwäbisch Gmünd, DE
• Gerd Schmutzler · Kareth, DE
• Stefan Lehmann · Tucson, US
• Dirk Baranowski · Regensburg, DE
• Gunter Lewentz · Regensburg, DE

Key dates

• Filing date: Mar 30, 1999
• Grant date: Feb 27, 2001
• Expiry date: Mar 30, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/703
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for transmitting a deflection of a piezoelectric actuator to a movable tappet includes a pressure chamber between the piezoelectric actuator and the tappet. The pressure chamber is substantially formed by two mutually parallel diaphragms having effective radii of different lengths. The diaphragm with the longer radius is associated with the piezoelectric actuator and the diaphragm with the shorter radius is associated with the tappet. Therefore, upon a deflection of the first diaphragm by the piezoelectric actuator, the second diaphragm is deflected by a greater distance toward the tappet. A controller with an actuator having a controllable length is also provided.