Patent ID: 7546823
Filing Date: 2009-06-16
Classification: F01L,Y10T

Abstract:
1. A valve control mechanism for an overhead valve, internal combustion engine having a camshaft moving a pushrod to move a rocker arm that in turn moves the valve, the pushrod defining a first end portion opposite the camshaft and a second end portion adjacent to the camshaft, comprising: a first roller rotatably connected to the first end portion of the pushrod that is opposite the camshaft; a second roller rotatably connected to the first end portion of the pushrod that is opposite the camshaft; a roller guide having a first profiled surface, the first roller and roller guide positioned so the first roller rolls along the first profiled surface, the first profiled surface configured to achieve a desired valve movement; and an engaging surface on the rocker arm with the rocker arm and second roller positioned so the second roller rolls along the engaging surface of the rocker arm to rotate the rocker arm as the first roller rolls along the first profiled surface.