Variable valve timing arrangement for engine

An internal combustion engine comprised of an engine body, a camshaft having at least one bearing portion journalled for rotation about a camshaft axis in said engine body, said camshaft having at least one cam lobe for operating at least one valve for said engine, a cam driving element driven by an engine output shaft in timed relationship therewith, a hydraulically operated variable valve timing mechanism adjustably coupling said cam driving element to said camshaft for driving said camshaft and for adjusting the timing of said camshaft relative to said engine output shaft, means forming a lubricant passage, a return passage and a hydraulic supply passage in the said engine body and terminating at said camshaft one bearing portion at different axial locations for supply lubricant for lubricating said camshaft one bearing portion and for supplying and exhausting lubricant for actuating said variable valve timing mechanism, a valve bore formed in said engine body extending transversely to said camshaft axis, and a reciprocal valve spool received in said valve bore for controlling the supply and exhaust of lubricant for actuating said variable valve timing mechanism.