EP 1253297 A1 20021030 - Hydraulically-assisted engine valve actuator
Title (en)
Hydraulically-assisted engine valve actuator
Title (de)
Hydraulisch unterstützte Betätigung von Motorventilen
Title (fr)
Mécanisme de commande de soupapes à assistance hydraulique
Publication
Application
Priority
EP 01110230 A 20010425
Abstract (en)
A hydraulically-assisted engine valve actuator for assisting in the actuation of an engine valve, includes a servo piston being operably coupled to the engine valve. A translatable pilot valve is in fluid communication with the servo piston and the main piston and is operably coupled to and controlled by a pilot valve positioning system. The pilot valve positioning system controls a translational stroke of the pilot valve to meter hydraulic fluid under pressure to and from the servo piston. A stroke magnifier magnifies a stroke of the pilot valve positioning system. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
F01L 9/10 (2021.01)
Citation (search report)
- [X] US 6044815 A 20000404 - DE OJEDA WILLIAM [US]
- [X] US 5638781 A 19970617 - STURMAN ODED E [US]
- [X] US 5507316 A 19960416 - MEYER LAWRENCE L [US]
- [X] US 5287829 A 19940222 - ROSE NIGEL E [AU]
- [X] US 5456223 A 19951010 - MILLER JOHN M [US], et al
- [X] US 5335633 A 19940809 - THIEN JAMES L [US]
- [X] EP 0550925 A2 19930714 - PHILIPS NV [NL]
Designated contracting state (EPC)
AT DE FR GB IT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 01110230 A 20010425