Getting steamy

I don't consider myself a car enthusiast, but these articles just keep popping up. While the air car is already slated to join the Indian taxi service, here's a technology that we just might see at home some day. It's a modified internal combustion engine whose inventor has added two steam cycles to the engine's normal four combustion cycles. Essentially, this engine captures some of the energy that would otherwise be lost as unused heat, resulting in 40% greater efficiency for gasoline engines, and 5% in diesels, which are already more efficient that gas.