The invention comprises the cylinder head, equipped with stationary lobes; a piston crown with lobes that mesh with the stationary lobes, without contact, to create turbulence in the combustion chamber, and rotary valves that manipulate movement of compressed air and exhaust gases in the combustion chamber and manifold; creating a mixture of air and fuel for more complete combustion with less recycled exhaust gases, and the improved design combustion chamber being cylinder shaped and adaptable to four cycle diesel engines is equipped with one poppet valve that when closed causes rotary valves to direct compressed air through the manifold for cooling purposes and when open, the cylinder, combustion chamber and manifold become a conduit for exhaust gases until piston movement ceases to move exhaust gases, then compressed air assumes exhaust gas movement purging the combustion chamber and manifold as piston movement downward begins the intake stroke.