We’ve heard rumors for years about engines capable of getting 100 miles to a gallon of fuel, but the reality is much closer than you might think. Josh “Mac” MacDowell says he not only has the engine, he has come up with an idea, strong enough the U.S. patent office has given him a patent for it. MacDowell is using a Stirling engine, coupled with thermopile technology to make it possible to drive a Hybrid electric car and never have to stop to charge it.
The Stirling engine was actually invented 200 years ago, in 1816. The engine is driven by the exchange of hot and cold air, much like nature drives a thunderstorm. The Stirling engine is capable of using roughly 50% of the energy it produces. An internal combustion engine, like the ones in our vehicles, uses about 14%.