Citroen unveils hybrid rally car

One of Citroen's big debuts at the Paris Motor Show was its HYmotion4 hybrid technology, which was fitted to the Citroën Hypnos and C4 WRC along with the Peugeot RC and Prologue. Unlike most hybrid systems, the French technology has no direct connection between the car's engine and battery, so the pack is recharged "through the road" when the car's regenerative braking is applied. There's a 125-kW electric motor attached to the rear axle that gets its power from 990 individual lithium ion cells wired up to produce 400-volts. The C4 WRC's driver can select from a number of modes to allow a specific amount of electric assistance, including running solely on the electric motor or using it as a short-term boost for added acceleration. This way, the car can be run in zero-emission mode or at full power, depending on the situation. Although no production machines have been announced with this new technology, the fact that the automaker has created four separate concepts with it shows that it is serious about its production possibilities.
source:autoblog