Electric Car: Chevy Volt
Chevy Volt uses range extending technology to recharge the batteries as its goes. The concept extends to any type of hybrid vehicle. The Chevrolet Volt is charged by plugging it into a 110-volt outlet for six hours per day. A fully charged battery will enable the Volt to deliver 40 city miles of electric-only vehicle range. When the battery is fully depleted, a 1-liter, three-cylinder turbocharged engine creates electricity and replenishes the battery. This increases the fuel economy and range.
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... "For instance, we've added a range extender using a system we call E-Flex.Basically, it works by using the onboard engine to generate additional energy for the battery. On a long trip, this system would continually charge the batteries, even after the initial battery range is passed. The range extender can be used with any type of onboard engine, whether it is powered by gasoline, ethanol, electricity or hydrogen — hence the Flex in E-Flex. This system will make the Volt the most versatile electric car when it comes out, virtually eliminating gasoline use for those who only take their cars for short distances ... " ...
Via GM FastLane Blog: GM Presents Chevy Volt Concept: A New Kind of Electric Car