One of the four hybrid drive vehicles shown by the PSA group at last fall’s Paris Motor show was version of its C4 WRC rally car. Like the others it used the HYbrid4 through-the-road architecture. The regular internal combustion engine drives the front wheels and a 167 hp electric motor drives the rear axle. A lithium ion battery pack with 990 cells sits above the fuel tank in the middle of the race car. Following the team’s victory in the Portugal Rally, driver Dani Sordo took the experimental hybrid racer out on two of the special stages that were used for the rally to evaluate it.
The test was deemed a success with Sordo running the car in internal combustion, regenerative braking, combined boost, and electric only modes. Currently, WRC rules don’t allow for hybrid drive systems, but Citroen will continue to develop and test the system in order to be ready in case the rules are changed.
Gallery: Citroën C4 WRC HYbrid4