Engine with rotating valve assembly

A cylinder head assembly, comprising:

• at least one intake valve assembly pocket defined by upper and lower cylinder head sections and at least one exhaust intake valve assembly pocket defined by the upper and lower cylinder head sections;
• at least one intake valve assembly positioned in the at least one intake valve assembly pocket and at least one exhaust valve assembly positioned in the at least one exhaust valve assembly pocket, the at least one intake valve assembly and at least one exhaust valve assembly each comprises:
• a housing having an internal cavity, an open top, and an open bottom, the open top and open bottom being in fluid communication with the internal cavity;
• a valve barrel positioned in the internal cavity and adapted for rotation therein, the valve barrel having an annular peripheral surface and an aperture extending transversely therethrough communicating with the peripheral surface on opposite sides;
• a first seal assembly positioned in the open top and a second seal assembly positioned in the open bottom, wherein the first and second seal assemblies each include a seal having a sealing surface in mating engagement with the peripheral surface and an aperture extending therethrough, the aperture having a size and shape substantially equal to the aperture in the valve barrel to permit flow therethrough;
• and
• wherein when the aperture of the valve barrel is in alignment with the apertures of the first and second seal assemblies, gas is permitted to flow through the valve assembly.