Animated Engines - Gnome Rotary
Get rid of the reciprocation altogether like this ancient design and you have the balanced operation of a turbine, with the closed cylindrical combustion chamber of the piston engine. Possisbly past 60% thermal efficiency.
lots of room for addditional development and already patented.
US#7677208.
Transonic Combustion | Revolutionizing Combustion Technology
Add this injection system. Diesel, gas, alcohol and many other combustibles in infinite combinations.
regards
mech