Title (en)

METHOD FOR DETERMINING THE DRIVE VOLTAGE OF A PIEZOELECTRIC ACTUATOR OF AN INJECTION VALVE

Title (de)

VERFAHREN ZUR BESTIMMUNG DER ANSTEUERSPANNUNG EINES PIEZOELEKTRISCHEN AKTORS EINES EINSPRITZVENTILS

Title (fr)

PROCEDE DE DETERMINATION DE LA TENSION DE COMMANDE D'UN ACTIONNEUR PIEZOELECTRIQUE D'UNE SOUPAPE D'INJECTION

Publication

EP 1664511 B1 20090325 (DE)

Application

EP 04762364 A 20040710

Priority

• DE 2004001504 W 20040710
• DE 10340137 A 20030901

Abstract (en)

[origin: WO2005026516A1] The invention relates to a method for determining the drive voltage of a piezoelectric actuator of at least one injector (1) with which an amount of liquid is injected at high pressure into a cavity, especially into the combustion chamber of an internal combustion engine, whereby the drive voltage is varied depending on the pressure with which the amount of liquid is impinged upon. The inventive method is characterized in that a drift of the drive voltage (voltage requirement) required for a predetermined lift of an on/off valve of the injector is controlled for each injector individually by controlling the difference between the switch-off voltage threshold (Uab) and stationary cut-off voltage (URegel) to a desired value predetermined for an operating point.

IPC 8 full level

F02D 41/20 (2006.01); F02D 41/24 (2006.01)

CPC (source: EP US)

F02D 41/2096 (2013.01 - EP US); F02D 41/2467 (2013.01 - EP US)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

WO 2005026516 A1 20050324; CN 100434682 C 20081119; CN 1816690 A 20060809; DE 10340137 A1 20050407; DE 502004009228 D1 20090507; EP 1664511 A1 20060607; EP 1664511 B1 20090325; JP 2007504386 A 20070301; JP 4532490 B2 20100825; US 2007182280 A1 20070809; US 7456545 B2 20081125

DOCDB simple family (application)

DE 2004001504 W 20040710; CN 200480018661 A 20040710; DE 10340137 A 20030901; DE 502004009228 T 20040710; EP 04762364 A 20040710; JP 2006525031 A 20040710; US 56761704 A 20040710