EP 0739444 A1 19961030 - VARIABLE VALVE TIMING MECHANISM
Title (en)
VARIABLE VALVE TIMING MECHANISM
Title (de)
VARIABLE VENTILSTEUERVORRICHTUNG
Title (fr)
MECANISME DE DISTRIBUTION A PROGRAMME VARIABLE
Publication
Application
Priority
- GB 9402797 W 19941215
- GB 9400748 A 19940115
Abstract (en)
[origin: GB2285671A] A torque transmitting mechanism permitting a limited degree of change in the phase of a camshaft 12 comprises concentric drive 14 and driven (10, Fig. 2) members connected respectively to a crankshaft 12 and a camshaft (not shown), at least one lever 20 being pivotally supported on one of the members (10, Fig. 2) and having a force transmitting surface that is biassed by a spring 22 to remain in contact at all times with a reaction surface 24 on the other member. The position of the point of contact between the two surfaces is dependent upon the relative angular position of the drive and driven members and moves progressively to vary the mechanical advantage of the lever as the shafts rotate relative to one another under the action of the torque reversals on the camshaft 12. There may be two levers 20 acting on two reaction surfaces 24. The reaction surface(s) may be profiled so that the lever surface rolls without slipping. Means (30, Fig. 2) for applying a variable drag between drive 14 and driven (10, Fig. 2) members may be provided and may comprise an electromagnetic clutch (30, Fig. 2) and a position sensor (40, Fig. 2) permitting closed loop control of the drag. <IMAGE>
IPC 1-7
IPC 8 full level
F01L 13/00 (2006.01)
CPC (source: EP)
F01L 13/0057 (2013.01)
Citation (search report)
See references of WO 9519493A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
GB 2285671 A 19950719; GB 9400748 D0 19940316; DE 69411193 D1 19980723; DE 69411193 T2 19990311; EP 0739444 A1 19961030; EP 0739444 B1 19980617; WO 9519493 A1 19950720
DOCDB simple family (application)
GB 9400748 A 19940115; DE 69411193 T 19941215; EP 95905179 A 19941215; GB 9402797 W 19941215