Shifting Speed and Belt Behavior of Model CVT (Continuously Variable Transmission) with Push and Pull Type V-belt Driven on Semi-Transparent Pulleys - Influence of Stiffness of V-belt in Clamping Direction Topics: City Mobility and Ecodriving In Proceedings of the 4th International Conference on Vehicle Technology and Intelligent Transport Systems VEHITS - Volume 1, 474-480, 2018 , Funchal, Madeira, Portugal