Internal combustion engine having rods for controlling twist pattern in combustion air supplied to valve chambers

A valve-controlled internal combustion engine which includes

• a cylinder head portion, said cylinder head portion including a valve chamber;
• a combustion air inlet channel which communicates with said valve chamber to deliver combustion air thereto, said combustion air inlet channel being formed by an inner wall, an outside wall and a bottom wall, a nozzle area being formed where the combustion air flows past said bottom wall into said valve chamber;
• and a bore which extends along an axis through said cylinder head portion to directly communicate with said outside wall of said combustion air inlet channel at a point adjacent said bottom wall;
• and
• a cylindrical bar which extends in and along said bore in said cylinder head portion, said cylindrical bar being sufficiently elongated to be extendable from said outside wall of said combustion air inlet channel and sealingly along said bottom wall to abut said inner wall, said cylindrical bar being rotatable about its axis and slidingly movable along the axis of said bore to be adjustably positioned within said combustion air inlet channel and having means to affect the degree of twist in the combustion air flowing perpendicularly therepast and through said nozzle area into said valve chamber baised on its degree of insertion into said combustion air inlet and its rotational orientation.