Simulation of suspension system and evaluation of dissipated energy by the system highlights the potential of the car operation mode, where the suspension can provide a significant amount of power. A roughness road profile and a car with elastic suspension springs and stiff dampers can provide significant energy. This energy varies between 4% and 8% of the energy consumed by the engine vehicle, considering the road speed profiles below 60 km/h and a vehicle with reduced rolling resistance and drag coefficient.