Valve train arrangement for multi-valve engine

A valve train arrangement for a multi-valve internal combustion engine, comprising:

• a cylinder head;
• pivot means mounted on said cylinder head;
• two valve stems;
• a cam for operating said valve stems;
• a cam follower pivotally mounted at one end on said pivot means and having at the other end two fingers operatively engaged with said cam for transmitting motion of said cam to said valve stems;
• a pair of guide arms provided to said cylinder head in such a manner as to interpose therebetween said cam follower;
• said cam follower having on opposite sides thereof sliding faces;
• said guide arms having guiding faces respectively matched with said sliding faces in such a manner that a clearance (W) is provided between each of matched pairs of said guiding faces and said sliding faces;
• said fingers of said cam follower being provided with integral flanges which depend downwardly on the inboard sides of said valve stems;
• and
• a clearance (C.sub.1) being defined between matched pairs of said flanges and said valve stems, said flanges each having a chamferred end of which a guiding edge most remote from a corresponding one of said fingers is arranged so that a clearance (C.sub.2) is provided between said guiding edge and a corresponding one of said valve stems, said clearances (C.sub.1), (C.sub.2) and (W) being set so as to satisfy the relationship C.sub.2 >W>C.sub.1.