Machine element or mechanism – Elements – Cams
Patent
1989-10-10
1991-07-23
Luong, Vinh T.
Machine element or mechanism
Elements
Cams
74567, F16H 5300
Patent
active
050333275
ABSTRACT:
A phase adjuster for engine camshafts and the like includes in a preferred embodiment a sprocket driving a camshaft attached hub through paired wedge packs that transfer torque and maintain a lash free connection. A plunger actuated by engine oil pressure and coating drive springs axially move alternate active wedges to oppositely vary the arcuate lengths of the wedge packs and thereby change the phase angle between the sprocket and camshaft. A three way valve shuts off pressure oil flow except when needed to advance the plunger, thus minimizing oil flow requirements.
REFERENCES:
patent: 1531909 (1925-03-01), Engemann
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patent: 3656370 (1972-04-01), Wilson
patent: 3678225 (1972-07-01), Hulterstrum
patent: 4627825 (1986-12-01), Bruss et al.
patent: 4723517 (1988-02-01), Frost
patent: 4885437 (1989-12-01), Tenniswood et al.
patent: 4889086 (1989-12-01), Scapecchi et al.
patent: 4895113 (1990-01-01), Speier et al.
Elphick Thomas G.
Kovacevich Kenneth A.
Lichti Thomas H.
Niemiec Michael J.
Shost Mark A.
General Motors Corporation
Luong Vinh T.
Outland Robert J.
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