Wave Disk Generator : Engine that requires no transmission, crankshaft, pistons, valves, fuel compression, cooling systems or fluids.

The engine has a rotor that's equipped with wave-like channels that trap and mix oxygen and fuel as the rotor spins. These central inlets are blocked off, building pressure within the chamber, causing a shock wave that ignites the compressed air and fuel to transmit energy.
The Wave Disk Generator uses 60 percent of its fuel for propulsion; standard car engines use just 15 percent. As a result, the generator is 3.5 times more fuel efficient than typical combustion engines.
For more information visit:http://news.discovery.com/tech/new-car-engine-sends-shockwaves-through-auto-industry-110405.html#mkcpgn=emnws1