By torque split method and combination of a full-toroidal variator, an epicyclic gear train and a fix-ratio gear, the full-toroidal traction IVT is capable of changing the reduction gear ratio up to plus infinite (when forward drive) or minus infinite (when backward drive). In other words, the output axle of the IVT can undergo the running condition from one direction revolution to reverse revolution via geared neutral state. This is why the IVT (Infinitely Variable Transmission) is denominated. Due to exce...