Follow-up 17 Oct 17, The Achates Power Opposed-Piston Engine which the Army has asked for production of a small diesel will use pistons that swirl the gasses to improve efficiency...go figure..not the same design, no patents anyway, but this was along the right track scientifically. WAW
Would that the internet be so easy to post drawings... Sigh.
I'll try again for a description in the mean time.
Cast into the head (piston side) cresent shaped ridge starting where the valves are (possibly in between them if there's room) seperates the fuel from the exhaust side, the curvature rolls toward the front of the engine as it approaches the cylinder (this would mean the intake was on the front of that cylinder) it tapers off into the head to provide piston clearence. (could go into the cylinder area if there was clearence atop the piston)
Atop the piston (modified or replaced) is another set of (say 10 each) cresents (or grooves milled in) starting at the center and working outward (like a spinning galaxy? or rifling of a barrel as you look down it) but these rotate in the same direction as the intake diverter is pointing (so the effect of swirling the exhaust or air/fuel mix is always rotating in sync with the intake flow) basically trying to make a mini tornado effect within the cylinder as it rises and falls. The exhaust gases hitting the backside of the diverter would be forced toward the exhaust valve, while the intake side is pulled due to the swirling effect (vacuum) into the cylinder (enhancing flow and improving the mixture process)
I suppose there should be an opposite cresent on the exhaust side which assists in guiding the flow that way as well, so seen from above it would be a stick figure "bird" "vee' shape with the base of the Vee seperating the valves and spreading as it approaches the cylinder wall.
Hope it's clearer, if you really want a drawing I could make one on .PPT or such. Just a thought on trying something different with inthe cylinder for flow dynamics.
V/R W. Winget
PS: if you want to cast a 4 sparkplug Standard B 1918 Liberty truck head, I have one as an example...it takes two (front and rear cylinder banks) and the gentleman in Arizona with one he uses as a paperweight
doesn't want to let it go