Patent ID: 7322325

Claim:
An internal combustion engine including an engine head portion with an apparatus for varying opening lift displacement of a valve of the engine, the apparatus comprising: a rocker arm having a body defining an elongate aperture, a first end, a second end, and an upper surface, where the first end is configured to receive an actuating device, and the second end is configured to engage an end of the valve; a fixed fulcrum point in a fixed position relative to the engine head portion so as to be engageable with the upper surface of the rocker arm, and a rocker arm shaft configured to pass through the elongate aperture and having a cross-section dimension smaller than a width of the elongate aperture such that the rocker arm shaft is selectively movable within the aperture in the elongate direction of the aperture between a lower position and an upper position such that the rocker arm is pivotable around the rocker arm shaft when the rocker arm shaft is in lower position and the upper surface of the rocker arm is engageable with the fixed fulcrum point when the rocker arm shaft is in the upper position such that the rocker arm is movable to engage and pivot around the fixed fulcrum point.