EP 1488088 B1 20070523 - METHOD AND DEVICE FOR DETECTING THE MOMENT OF IMPACT OF THE VALVE NEEDLE OF A PIEZO CONTROL VALVE
Title (en)
METHOD AND DEVICE FOR DETECTING THE MOMENT OF IMPACT OF THE VALVE NEEDLE OF A PIEZO CONTROL VALVE
Title (de)
VERFAHREN UND VORRICHTUNG ZUR DETEKTION DES EINSCHLAGZEITPUNKTES DER VENTILNADEL EINES PIEZO-STEUERVENTILS
Title (fr)
PROCEDE ET DISPOSITIF DE DETECTION DU MOMENT D'IMPACT DU POINTEAU D'UNE SOUPAPE DE COMMANDE PIEZOELECTRIQUE
Publication
Application
Priority
- DE 0301006 W 20030326
- DE 10213874 A 20020327
Abstract (en)
[origin: WO03081007A1] The aim of the invention is to be able to detect the moment of impact of the valve needle (48) pertaining to a piezo control valve (22) of a pump-nozzle unit, when the piezo control valve (22) is closed and/or opened. To this end, the piezo voltage (u(t)) and/or piezo current (i(t)) are evaluated. Said evaluation can especially involve the identification of discontinuities and/or pulses during the course of the piezo voltage (u(t)) and/or the piezo current (i(t)). The detected moment of impact can advantageously be put in temporal relation with a known auxiliary variable (SOI, EOI), especially for regulation purposes.
IPC 8 full level
F02D 41/20 (2006.01); F02M 57/02 (2006.01); F02M 59/36 (2006.01); F02M 59/46 (2006.01); F02M 65/00 (2006.01); F02M 45/02 (2006.01); F02M 45/04 (2006.01); F02M 45/12 (2006.01); F02M 61/20 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP)
F02D 41/2096 (2013.01); F02M 57/02 (2013.01); F02M 59/366 (2013.01); F02M 59/468 (2013.01); F02M 65/003 (2013.01); F02D 2041/2051 (2013.01); F02D 2041/2055 (2013.01); F02D 2041/2058 (2013.01); F02M 45/02 (2013.01); F02M 45/04 (2013.01); F02M 45/12 (2013.01); F02M 57/023 (2013.01); F02M 61/205 (2013.01); F02M 2200/24 (2013.01); F02M 2200/701 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 03081007 A1 20031002; DE 50307324 D1 20070705; EP 1488088 A1 20041222; EP 1488088 B1 20070523
DOCDB simple family (application)
DE 0301006 W 20030326; DE 50307324 T 20030326; EP 03720240 A 20030326