New Shock Wave Generation Hybrid Engine

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.

SOURCE:
http://derrenbrown.co.uk/blog/2011/04/engine-sends-shock-waves-auto-industry/