EP 1521902 A1 20050413 - DEVICE FOR THE CONTROL OF GAS EXCHANGE VALVES
Title (en)
DEVICE FOR THE CONTROL OF GAS EXCHANGE VALVES
Title (de)
VORRICHTUNG ZUR STEUERUNG VON GASWECHSELVENTILEN
Title (fr)
DISPOSITIF POUR COMMANDER DES SOUPAPES DE CHANGEMENT DES GAZ
Publication
Application
Priority
- DE 0300697 W 20030305
- DE 10230478 A 20020706
Abstract (en)
[origin: WO2004005679A1] A device for the control of gas exchange valves in an internal combustion engine is disclosed, comprising a hydraulic valve actuator (11), provided for each gas exchange valve, with an actuator piston (13) acting on the gas exchange valve and two hydraulic working chambers (121, 122), defined by the actuating piston (13), of which the first working chamber (121), which pressurises the gas exchange valve in the closing direction, is permanently filled with a pressurised fluid and the second working chamber (122), which pressurises the gas exchange valve in the opening direction, may alternately be filled with and drained of pressurised fluid, by means of two electrically-operated control valves (25, 26). According to the invention, cost may be reduced whereby a single first electrical control valve (25) is provided for each valve actuator pair (11a, 11b), which is pressurised on the inlet side with the fluid pressure and is connected on the outlet side to the second working chamber (122) of the one valve actuator (11a). The fluid filling of the second working chamber (122) of the other valve actuator (11b) is carried out by means of a switching valve (29) and the fluid pressure in the second working chamber (122) of the one valve actuator (11a).
IPC 1-7
IPC 8 full level
F01L 9/10 (2021.01)
CPC (source: EP US)
F01L 9/10 (2021.01 - EP US)
Citation (search report)
See references of WO 2004005679A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004005679 A1 20040115; AT E434117 T1 20090715; DE 10230478 A1 20040115; DE 50311613 D1 20090730; EP 1521902 A1 20050413; EP 1521902 B1 20090617; JP 2005532496 A 20051027; JP 4399360 B2 20100113; US 2005005881 A1 20050113; US 7134408 B2 20061114
DOCDB simple family (application)
DE 0300697 W 20030305; AT 03717127 T 20030305; DE 10230478 A 20020706; DE 50311613 T 20030305; EP 03717127 A 20030305; JP 2004518373 A 20030305; US 48844604 A 20040826