Libralato hybrid engine is a new kind of rotary engine with a new thermodynamic cycle. The engine was first concept tested in 2011, followed by more rigorous proof of concept testing and analysis in 2014, which indicated that its revolutionary 9-phase cycle is effective and is capable of exceptionally high efficiency and low emissions. Libralato claims that their engine might be the most efficient compact engine in the world; at least as efficient as a diesel engine (c.40%) using gasoline but half the size and weight. Filmed at the IDTechEx.com Show!