A new engine may soon offer additional solutions as far as the eco-friendly side is concerned with the Dearman engine. The said engine is another zero-emission engine that can reportedly combine with hydrogen fuel cells and battery electric systems.
The engine runs by injecting cryogenic liquid air into the ambient heat inside the engine which will in turn produce high pressure gas that will power up the said engine. The Dearman engine is said to be cheaper to build over battery powered and fuel cell technology engines which should broaden the scope of alternative engines that can be potentially used by future and concept vehicles.
In all, the engine seems to be leaning on an internal combustion engine without the need of a spark plug. There is no combustion, but because the air is stored at cryogenic temperatures (sub minus 160 degrees Celsius), ambient temperatures can superheat it and return it to gaseous form, causing a rapid expansion of gases.