Abstract
A combustion engine driven vehicle with wide range transmission has been made and tested. This wide range transmission consists of a half toroidal type continuously variable transmission (CVT) and a differential gear, which transmit the engine torque to wheels by various reduction ratio expanded from forward to reverse. The toroidal CVT consists of 2 disks and a power roller supported by a parallel link mechanism. The inclination angle of the power roller decides the reduction ratio. The incremental or decremental speed of the inclination angle is controlled by the joint angle of the parallel link mechanism. The vehicle speed is controlled by a servo mechanism, which consists of a rotation sensor of the output shaft and a link driver.
