TRACK DETERMINING METHOD FOR CAM OF CAM-TYPE ENGINE AND HUMP TRACK PART, AND CAM WHOSE TRACK IS DETERMINED BY SAID METHOD AND CAM-TYPE ENGINE HAVING HUMP TRACK PART

摘要

A track determining method for a cam and a hump track part of a cam-type engine, the cam-type engine on where a roller rolls along a cam track surface (CT) having a plurality of crests and valleys, are provided by using a radius (R1) of a circumscribed circle externally contacting a crest of the cam track surface, a radius (R2) of an inscribed circle internally contacting a valley of the cam track surface, a radius (Ra) of a crest circle internally contacting the circumscribed circle, a radius (Rb) of a valley circle externally contacting the crest circle and the inscribed circle, a radius (R) of the main circle of which is the same as the radius of the main roller rolling along the cam track surface, and a radius (r) of a cell circle tangent to the main circle and having a same center as that of the auxiliary roller.