EP 1082531 A1 20010314 - METHOD FOR CONTROLLING A VALVE LIFT DEVICE
Title (en)
METHOD FOR CONTROLLING A VALVE LIFT DEVICE
Title (de)
STEUERUNGSVERFAHREN FÜR EINE VENTILHUBEINRICHTUNG
Title (fr)
PROCEDE DE COMMANDE D'UN DISPOSITIF DE LEVEE DE SOUPAPES
Publication
Application
Priority
- EP 9903685 W 19990527
- FR 9806791 A 19980529
Abstract (en)
[origin: FR2779182A1] The invention concerns a method for controlling a valve lift device, associated with an internal combustion engine. Said method is characterised in that it consists in: (a) determining the angular offset reference value alpha 0 when the valve lift device is inactivated, each time the engine moves into stabilised idle speed and taking it into account for subsequent angular offset control; and it further consists of at least one of the following steps: (b) prior test stand mapping on an opening cycle ratio (RCO) of a hydraulic valve controlled valve lift device PID based on the engine water temperature, and adjusting the angular offset to be applied (by modifying the reference value alpha 0 according to said water temperature; (c) determining the difference between the applied (RCO) control and the control computed at step (b) by observing term I of the valve lift control PID and by storing its value in an adaptive term; (d) determining the valve lift response time following a predetermined control level and on the basis of said response time, modifying the proportional term P of the PID; (e) verifying that the angular offset between the camshaft and the crankshaft does not oscillate when the set value is stable, and consequently modifying the term P of the PID to prevent said oscillation.
IPC 1-7
IPC 8 full level
F01L 1/34 (2006.01); F02D 41/24 (2006.01)
CPC (source: EP US)
F01L 1/34 (2013.01 - EP US); F02D 41/2496 (2013.01 - EP US); F01L 2201/00 (2013.01 - EP US)
Citation (search report)
See references of WO 9963213A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
FR 2779182 A1 19991203; FR 2779182 B1 20000825; DE 69902659 D1 20021002; DE 69902659 T2 20030109; EP 1082531 A1 20010314; EP 1082531 B1 20020828; ES 2182533 T3 20030301; US 6397799 B1 20020604; WO 9963213 A1 19991209
DOCDB simple family (application)
FR 9806791 A 19980529; DE 69902659 T 19990527; EP 9903685 W 19990527; EP 99926449 A 19990527; ES 99926449 T 19990527; US 70152001 A 20010409