EP 1268999 A1 20030102 - METHOD FOR DETERMINING THE RAIL PRESSURE OF AN INJECTION VALVE HAVING AN PIEZOELECTRIC ACTUATOR
Title (en)
METHOD FOR DETERMINING THE RAIL PRESSURE OF AN INJECTION VALVE HAVING AN PIEZOELECTRIC ACTUATOR
Title (de)
VERFAHREN ZUR BESTIMMUNG DES RAILDRUCKS EINES EINSPRITZVENTILS MIT EINEM PIEZOELEKTRISCHEN AKTOR
Title (fr)
PROCEDE DE DETERMINATION DE LA PRESSION DE RAMPE D'UNE SOUPAPE D'INJECTION COMPRENANT UN ACTIONNEUR PIEZO-ELECTRIQUE
Publication
Application
Priority
- DE 0100175 W 20010117
- DE 10014737 A 20000324
Abstract (en)
[origin: WO0173282A1] The invention relates to a method for determining the rail pressure of an injection valve having a voltage-controlled piezoelectric actuator. Said piezoelectric actuator (2) actuates a nozzle needle (11) by means of a hydraulic coupler (4). The pressure in the high pressure channel (13), via the hydraulic coupler (4), builds up a coupler pressure (Pk) that induces a piezovoltage (Ui) in the actuator (2). As this voltage is redundant with respect to the pressure in the high pressure channel (13) measured by a pressure sensor (D), it can used to monitor the function of the pressure sensor (D). If the pressure sensor (D) fails, an emergency operation for the injection valve (1) can be established using the induced voltage (Ui). The injection valve (1) is preferably used for injecting fuel into an internal combustion engine.
IPC 1-7
IPC 8 full level
F02D 41/20 (2006.01); F02D 41/22 (2006.01); F02D 41/38 (2006.01); F02D 45/00 (2006.01); F02M 47/00 (2006.01); F02M 47/02 (2006.01); F02M 51/06 (2006.01); F02M 59/46 (2006.01); F02M 65/00 (2006.01)
CPC (source: EP US)
F02D 41/2096 (2013.01 - EP US); F02D 41/22 (2013.01 - EP US); F02D 41/3836 (2013.01 - EP US); F02M 47/027 (2013.01 - EP US); F02M 63/0026 (2013.01 - EP US); F02M 63/0036 (2013.01 - EP US); F02D 2041/223 (2013.01 - EP US); F02D 2200/0602 (2013.01 - EP US); F02D 2200/0604 (2013.01 - EP US); F02M 2200/24 (2013.01 - EP US); F02M 2200/703 (2013.01 - EP US)
Citation (search report)
See references of WO 0173282A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 0173282 A1 20011004; CN 1227455 C 20051116; CN 1419630 A 20030521; DE 10014737 A1 20011011; DE 50107907 D1 20051208; EP 1268999 A1 20030102; EP 1268999 B1 20051102; JP 2003529017 A 20030930; US 2003154806 A1 20030821; US 6712047 B2 20040330
DOCDB simple family (application)
DE 0100175 W 20010117; CN 01807083 A 20010117; DE 10014737 A 20000324; DE 50107907 T 20010117; EP 01909484 A 20010117; JP 2001570978 A 20010117; US 23958503 A 20030227