The Chevrolet Volt previews a new family of plug-in electric drive systems that GM calls E-Flex.
#7. E-Flex
The car of the future will be powered by hydrogen. No, wait, ethanol. No,
electric batteries. Though the automobile is clearly at a crossroads, no
one knows exactly which clean technology will succeed the gasoline-powered
engine. That's why General Motors' E-Flex system is smart. Introduced early
this year on its concept electric car, the Chevrolet Volt, the E-Flex
platform can be adapted to run on an electric battery, a hydrogen fuel cell,
ethanol or standard gasoline. That gives GM the flexibility to adapt to what
lies ahead.