EP 1902200 A1 20080326 - ACTUATOR AND CONTROL METHOD FOR VARIABLE VALVE TIMING (VVT) MECHANISM
Title (en)
ACTUATOR AND CONTROL METHOD FOR VARIABLE VALVE TIMING (VVT) MECHANISM
Title (de)
AKTOR UND STEUERVERFAHREN FÜR EINEN MECHANISMUS ZUR VARIABLEN VENTILSTEUERUNG
Title (fr)
VERIN ET METHODE DE CONTROLE POUR UN MECANISME DE DISTRIBUTION A PROGRAMME VARIABLE
Publication
Application
Priority
- US 2006024795 W 20060626
- US 69417205 P 20050627
Abstract (en)
[origin: WO2007002582A1] A variable valve timing system includes a toothed rotating sleeve, a rack, and an actuator. The rack has a first end, a second end with a plurality of teeth in meshing contact with the teeth of rotating sleeves of the valve and being linearly moveable to rotate the sleeves. The actuator includes a housing, a control valve, and at least one check valve. The housing slidably receives a piston coupled to the rack separating a chamber in the housing into first and second chambers. The control valve selectively directs fluid from the first to the second chamber or vice versa. When the rack is shifted linearly by vibrational impulses from the engine, the piston moves linearly within the housing, pressurizing the first or the second chamber and under control of the control valve, fluid recirculates from the first or the second chamber to the other chamber.
IPC 8 full level
F01L 1/14 (2006.01)
CPC (source: EP US)
F01L 1/143 (2013.01 - EP US); F01L 1/34 (2013.01 - EP US); F01L 1/3442 (2013.01 - EP US); F01L 13/0031 (2013.01 - EP US); F01L 13/0042 (2013.01 - EP US); F01L 13/0063 (2013.01 - EP US); F01L 2001/34426 (2013.01 - EP US); F01L 2820/033 (2013.01 - EP US)
Citation (search report)
See references of WO 2007002582A1
Designated contracting state (EPC)
DE FR IT
DOCDB simple family (publication)
WO 2007002582 A1 20070104; EP 1902200 A1 20080326; US 2008149058 A1 20080626
DOCDB simple family (application)
US 2006024795 W 20060626; EP 06773993 A 20060626; US 91185306 A 20060626