The Opel Flextreme is a diesel plug-in hybrid concept car created by General Motors. It can travel 55 kilometres (34 mi) on its lithium-ion battery before a small diesel engine starts charging the battery (it is a series hybrid). The Flextreme uses the same platform and technology as the Chevrolet Volt. In January 2008, a rebadged version of the concept was introduced at the North American International Auto Show as the Saturn Flextreme. In order to expand on different ways of recharging the battery on the GM E-Flex platform, GM created the Cadillac Provoq to recharge itself using a hydrogen fuel cell, in addition to the onboard gasoline, E85, and diesel engines found in the other concepts. The Opel Flextreme is expected to emit 40 grams of CO2 per km or less (according to European test procedure ECE R101 for range extender vehicles).
By : Wikipedia.com