EP 2084757 A1 20090805 - CONTROL DEVICE FOR AN ULTRASONIC PIEZOELECTRIC ACTUATOR
Title (en)
CONTROL DEVICE FOR AN ULTRASONIC PIEZOELECTRIC ACTUATOR
Title (de)
STEUEREINRICHTUNG FÜR EINEN PIEZOELEKTRISCHEN ULTRASCHALL-AKTOR
Title (fr)
DISPOSITIF DE COMMANDE D'UN ACTIONNEUR PIEZO-ELECTRIQUE ULTRASONORE
Publication
Application
Priority
- FR 2007052014 W 20070926
- FR 0609043 A 20061016
Abstract (en)
[origin: WO2008047018A1] The device comprises a first stage (1) supplied by a DC voltage source (Vbat) and provided with means for forming a second DC voltage (Vint) above that (Vbat) delivered by the source, and a second stage (2) provided with means for amplifying the second voltage (Vint) and chopping the voltage obtained by the excitation of the actuator with the chopped voltage, under the control of a computer (C), the amplifying means comprising an inductor (L<SUB>p</SUB>) in electrical resonance with the piezoelectric actuator. According to the invention, the inductor (L<SUB>p</SUB>) is connected to the first stage (1) so as to constitute, during formation of the second voltage (Vint), the secondary winding of a transformer forming part of a flyback voltage converter introduced into said first stage in order to develop the second voltage (Vint). Application to the control of a fuel injector in an internal combustion engine.
IPC 8 full level
H01L 41/04 (2006.01); F02D 41/20 (2006.01); H02N 2/06 (2006.01)
CPC (source: EP US)
F02D 41/2096 (2013.01 - EP US); H02N 2/065 (2013.01 - EP US); H10N 30/802 (2023.02 - EP US)
Citation (search report)
See references of WO 2008047018A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
FR 2907279 A1 20080418; FR 2907279 B1 20081205; EP 2084757 A1 20090805; JP 2010507360 A 20100304; JP 5086358 B2 20121128; US 2010033116 A1 20100211; US 8154225 B2 20120410; WO 2008047018 A1 20080424
DOCDB simple family (application)
FR 0609043 A 20061016; EP 07823859 A 20070926; FR 2007052014 W 20070926; JP 2009532855 A 20070926; US 44432507 A 20070926