Patent ID: 6722326
Filing Date: 2004-04-20
Classification: F01L

Abstract:
A variable lift cylinder valve system for an internal combustion engine, comprising:at least one poppet valve disposed within a cylinder head of the engine, with said poppet valve having a head and a stem adapted for contact by a valve opening member; a spring for biasing the poppet valve into a closed position; at least one valve operating camshaft carrying at least one cam lobe; a rocker arm in contact with said at least one cam lobe and said valve stem; a translational pivot, in articulated contact with the rocker arm, for converting a linear component of motion of said at least one cam lobe into rotational motion of the rocker arm and a corresponding linear motion of said poppet valve; a control shaft extending along an axis generally parallel to the axis of said camshaft, with said control shaft being mounted for pure rotation about said control shaft axis; and a control arm, mounted upon said control shaft and operatively connected with said translational pivot, for converting rotational motion of said control shaft into translational motion of said pivot, so as to control the lift ratio of said rocker arm.