Patent ID: 8127727
Filing Date: 2012-03-06
Classification: F01L,Y10T

Abstract:
1. A mechanism for actuating a poppet valve of an internal combustion engine, comprising: two coaxially mounted cams, each having a cam profile; cam followers in at least intermittent contact with the respective cams a common summation lever which is movable in proportion to the instantaneous sum of the lifts of the two cams, the cam followers being coupled to the common summation lever; a rocker pivotably connected to the common summation lever and serving to open the poppet valve; the rocker being pivotable about a pivot having a preset position; and, a control spring coupled to the summation lever and to a fixed point on the engine, to urge the rocker against a portion of the poppet valve and the pivot while the poppet valve is closed.