EP 2297443 A1 20110323 - METHOD AND DEVICE FOR ERROR DIAGNOSIS IN AN ENGINE SYSTEM WITH VARIABLE VALVE CONTROLS
Title (en)
METHOD AND DEVICE FOR ERROR DIAGNOSIS IN AN ENGINE SYSTEM WITH VARIABLE VALVE CONTROLS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR FEHLERDIAGNOSE IN EINEM MOTORSYSTEM MIT VARIABLER VENTILANSTEUERUNG
Title (fr)
PROCÉDÉ ET DISPOSITIF PERMETTANT LE DIAGNOSTIC D'ERREURS DANS UN SYSTÈME MOTEUR AVEC COMMANDE DE SOUPAPE VARIABLE
Publication
Application
Priority
- EP 2009054031 W 20090403
- DE 102008001099 A 20080409
Abstract (en)
[origin: WO2009124891A1] The invention relates to a method for diagnosing the function of one or more variably controllable inlet (8) and/or outlet valves (12) in an internal combustion engine (1); comprising the following steps: - determining a modeled pressure (Pmod) using a pressure profile model, said modeled pressure providing an indication of a pressure in an air system of the internal combustion engine (1), wherein the pressure profile model describes a pressure profile of an error-free internal combustion engine (1) as a function of operating points: providing an indication of the actual, instantaneous pressure (Pman) in the air system; determining a deviation amount as a function of the modeled pressure (Pmod) and the indication of the actual pressure (Pman) in the air system; recognizing an error in the function of the inlet (8) and/or outlet valve (12) as a function of the deviation amount.
IPC 8 full level
F02D 41/22 (2006.01); F02D 13/02 (2006.01); F02D 41/00 (2006.01)
CPC (source: EP US)
F02D 13/02 (2013.01 - EP US); F02D 41/0002 (2013.01 - EP US); F02D 41/221 (2013.01 - EP US); F02D 2200/0402 (2013.01 - EP US); F02D 2200/0406 (2013.01 - EP US); F02D 2200/0408 (2013.01 - EP US); Y02T 10/12 (2013.01 - EP US); Y02T 10/40 (2013.01 - EP US)
Citation (search report)
See references of WO 2009124891A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
DE 102008001099 A1 20091015; CN 102057150 A 20110511; EP 2297443 A1 20110323; US 2011137509 A1 20110609; WO 2009124891 A1 20091015
DOCDB simple family (application)
DE 102008001099 A 20080409; CN 200980121720 A 20090403; EP 09730887 A 20090403; EP 2009054031 W 20090403; US 93706409 A 20090403