EP 1646770 A1 20060419 - VALVE GEAR
Title (en)
VALVE GEAR
Title (de)
VENTILSTEUERUNGSEINRICHTUNG
Title (fr)
ENSEMBLE DE SOUPAPE D'ECHAPPEMENT
Publication
Application
Priority
- GB 2004002762 W 20040628
- GB 0315246 A 20030630
- GB 0406888 A 20040326
Abstract (en)
[origin: WO2005003524A1] Valve gear for an internal combustion engine comprises a camshaft (8) carrying a cam (10) which has a profile which varies in the direction of the camshaft axis (12), the camshaft (8) being axially displaceable to vary the action of the cam (10) on the valve (14). A pair of fingers (30, 32) are interposed between a cam (10) and an associated valve stem (20). The upper finger (30) has a recess (48) along which moves a roller (62) carried by the lower finger (32). The profile of the surface of the recess (48) is such that rotation of the cam (10) is converted into a desired acceleration profile of the valve stem (20), without requiring a re-entrant profile of the cam (10). In one embodiment, the position of the pivot axis of the lower finger (32) can be adjusted during running of the engine to vary the lift characteristic of the valve.
IPC 1-7
IPC 8 full level
F01L 13/00 (2006.01)
CPC (source: EP)
F01L 13/0042 (2013.01); F01L 13/0063 (2013.01)
Citation (search report)
See references of WO 2005003524A1
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 PL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
GB 2004002762 W 20040628; EP 04743111 A 20040628