Desmodromic valve and adjustable cam system

Abstract

The present invention provides an exemplary rockerless desmodromic valve and adjustable overhead cam system adapted to be installed onto a head for an internal combustion engine which utilizes at least one valve for each intake and exhaust port. The system includes a plurality of valves having a retaining sphere disposed on a distal tip of a stem of each valve; a camshaft; and a split cam lobe assembly assigned to each valve. The split cam lobe assemblies include a left and right cam lobe, a camshaft receiving hole oriented transversely through each cam lobe adapted to slidably receive the camshaft, and a cam following groove halve disposed on the interior side. Furthermore, the interior sides of the left and right cam lobe are adapted to be interfaced together to form a following groove having a generally spherical cross-sectional shape adapted to slidably receive the retaining sphere from a respective one of the valves. The system further includes a plurality of springs concentrically disposed around the camshaft and further longitudinally positioned between cam lobe assemblies and the bearing journals, wherein the plurality of springs maintain a constant force against the exterior sides of the cam lobes to maintain the split lobe cam assemblies compressed together.

Dependencies are inferred from the claim text.