[Gasification] tar proof Rotary Cylinderhead

[Philippe Raufast]

  "A new spherical port-type rotary valve system is incorporated with conventional reciprocating engines by replacing the traditional noisy cumbersome high pumping-loss poppet valve-train.

The operation of this new economical valve package has been proven durable (in extended dynamometer and road tests) and shown to deliver many superior engine performance features. 

The only moving element in the new mechanism is one set of rotating spherical valves per cylinder mated with respective floating ports whose sealing actions are linked to the cylinder pressure variation. This creative concept has become a proven engineering reality thanks to recent advancements in design and some new material technology. 

Among the beauty of the new invention is no need for costly modification in the existing manufacturing line of the present engine block. It is truly an engine technological breakthrough which offers revolutionized performance and convenience. 

Absence of poppet valves and other operating accessories normally housed under the valve cover has permitted elimination of both oil lubrication and cooling water flow in the upper portion of the cylinder head. This reduces the overall engine height by as much as 20 cm from that of its conventional counter part, and maintains a clean engine. 

The new, patented simple valve-train unit has minimized the area of contact for fluid flow through the gas exchange ports by making use of wide-open circular cross-sections. This significantly cuts down the pumping loss and unmatchable increases the volumetric efficiency to achieve a high torque/power-density engine. 

The new dynamically balanced rotating spherical port valve eliminates entirely mechanical noise produced by current poppet-valve components. Hissing sound generated as gas flow squeaks through the narrow annulus valve opening in the conventional cylinder head is no longer audible. At the same time, the new unit cuts down, by an order of magnitude, the need for power out of the crankshaft. Normally a big parasitic power drain is required in conventional engines to drive the valve train.      "
http://www.coatesengine.com/csrv.html