A Spanish engineer has patented the design of an external combustion engine, which he claims can be cleaner, more powerful and with higher fuel economy than the current Internal Combustion engines. What we gather from the translated text, the engine has been developed by Alba Montecristo, and will be used as an external accessory to power conventional engines.

The engine does not need any oil for operation, but uses a new solid-liquid fuel, which the maker claims costs much less than oil. The new engine is not designed to replace the current ICEs, it will in fact, work as an auxiliary system, much like a hybrid. A fully functional prototype is expected to be around by 2011.
Via: PortalAutomotriz [Machine Translated]