EP 1426570 A2 20040609 - Low friction variable valve actuation device
Title (en)
Low friction variable valve actuation device
Title (de)
Mechanismus zur variablen Ventilsteuerung mit geringer Reibung
Title (fr)
Dispositif à basse friction pour commande variable de soupape
Publication
Application
Priority
- EP 01202103 A 20010601
- US 21525300 P 20000630
Abstract (en)
A variable valve train device (110) is mounted on the engine head and is pivotable about the camshaft to alter the timing and lift of a intake valve. A command link (122) controls the rotational position of the apparatus with respect to the camshaft and is rotationally supported by a cylindrical shell bearing (126) mounted on the engine head coaxial with the camshaft. The shell bearing is supported by an hydraulic lash adjuster (128) or an adjustable ball joint to minimize mechanical lash in the device. The command link includes a ring gear (123) which meshes with a control shaft gear (28) for advancing or retarding the valve timing. The command link pivotably supports a rocker assembly (132) for following the rotary motion of the valve-opening and valve-closing cam lobes. The rocker assembly is linked to an output cam (140) disposed between the camshaft and a roller finger follower for actuating the valve.
IPC 1-7
IPC 8 full level
F01L 13/00 (2006.01)
CPC (source: EP)
F01L 13/0005 (2013.01); F01L 13/0026 (2013.01); F01L 13/0063 (2013.01); F01L 2013/0073 (2013.01); F01L 2305/00 (2020.05)
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04000193 A 20010601