Camshaft phasing drive with wedge actuators

Details Camshaft phasing drive with wedge actuators Camshaft phasing drive with wedge actuators

F - Mech Eng,Light,Heat,Weapons

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F01L 1/34 (2006.01) F01L 1/04 (2006.01) F01L 1/344 (2006.01) F16D 3/10 (2006.01)

Patent

CA 2025059

CAMSHAFT PHASING DRIVE WITH WEDGE ACTUATORS Abstract of the Disclosure 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 coacting 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.

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