EP 1076918 A1 20010221 - PIEZO-ELECTRIC ACTUATOR
Title (en)
PIEZO-ELECTRIC ACTUATOR
Title (de)
PIEZOELEKTRISCHER AKTOR
Title (fr)
ACTIONNEUR PIEZO-ELECTRIQUE
Publication
Application
Priority
- DE 9903999 W 19991216
- DE 19906468 A 19990216
Abstract (en)
[origin: DE19906468A1] The invention relates to a piezo-electric actuator, especially a piezo-electric actuator for actuating control valves or injection valves in motor vehicles. The inventive actuator comprises an actuator body (10) in the form of a multi-layered laminate consisting of layers of a piezo-electric material and metal or electroconductive layers acting as electrodes placed therebetween. Said actuator body is elastically pre-tensed on the front faces thereof between a bottom plate (11) on the valve side and an opposite head plate (12) by means of two spring strips (13, 14) in a longitudinal direction on opposite sides of the body of the actuator, whereby the pre-tensing force can be adjusted using adjusting means. The piezo-electric actuator is characterized in that the adjusting means include an adjusting nut (16) that is screwed onto the outer thread (15) of a central axial extension pin (18) of the head plate (12), whereby said nut enables the pre-tensing force of the spring strips (13, 14) to be adjusted independently from the screw position thereof.
IPC 1-7
IPC 8 full level
F02M 51/06 (2006.01); H02N 2/04 (2006.01); H10N 30/50 (2023.01); H10N 30/88 (2023.01); F02M 63/00 (2006.01)
CPC (source: EP KR US)
F02M 51/0603 (2013.01 - EP US); H10N 30/50 (2023.02 - EP KR US); H10N 30/886 (2023.02 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 19906468 A1 20000831; DE 19906468 B4 20080207; EP 1076918 A1 20010221; JP 2002537531 A 20021105; KR 20010042666 A 20010525; US 6326717 B1 20011204; WO 0049666 A1 20000824
DOCDB simple family (application)
DE 19906468 A 19990216; DE 9903999 W 19991216; EP 99966875 A 19991216; JP 2000600315 A 19991216; KR 20007011368 A 20001013; US 67335000 A 20001229