Metalocaucho has developed an active suspension system consisting of a joint guidance with integrated hydraulic cushioning.
Metalocaucho “Hydrobush”, a solution developed and patented together with CAF, is an active suspension system which consists of an elastomer spring with integrated hydraulic damping.The main advantage is its active suspension technology, which enables significant increase to the train speed on curves; the whole bogie dynamics are improved through the use of a variable damping system, which can vary the operating parameters whilst the vehicle is in service (by modifying the hole diameter, fluid viscosity, etc). Other advantages are the freedom to twist in all directions and, as other conventional guiding bushes manufactured by MTC, it can also withstand high loads and temperatures acting on the front axle, due to its high endurance strength, while of COURSEisolating all vibrations.
The advantage for some Operators (especially in the UK) is the reduction of TRACK access charges.