Engineers are looking at an alternative to hydrogen fuel cells or conventional engines in hybrid vehicles, an efficient design called a free-piston engine. As Technology Review explains, a free-piston engine has no mechanical connection between the piston and the crankshaft, which reduces friction and makes for a more efficient engine. In fact, researchers believe it could be far more efficient in producing electricity than either conventional generators or newer fuel-cell technology.
Web pick posted by Neil Savage, Xconomy.com
