Make a Comment • Email Link • Send Letter to Editor IPFS News Link • Techno Gadgets High-Efficiency Generators for Hybrid Vehicles 10-04-2008 • Technology Review Free-piston engines could be used to generate electricity as efficiently as, and less expensively than, fuel cells. Watch Streaming Broadcast Live: LRN.fm DLive Live Chat Telegram Share this page with your friends on your favorite social network: