Piezoelectric actuator

US6172445A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Rudolf Heinz · Renningen, DE
• Dieter Kienzler · Leonberg, DE
• Roger Potschin · Brackenheim, DE
• Klaus-Peter Schmoll · Lehrensteinsfeld, DE
• Friedrich Boecking · Stuttgart, DE

Key dates

• Filing date: Feb 5, 1999
• Grant date: Jan 9, 2001
• Expiry date: Feb 5, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/26
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A piezoelectric actuator intended for instance for actuating injection valves in internal combustion engines of motor vehicles is protected against destructive tensile strains in that resilient prestressing elements that subject the piezoelectric body to precompression are provided for the piezoelectric body of the actuator.