Abstract: An automobile transmission system, comprising a planet gear interposed between the output gear and the speed differentiator of a conventional transmission device, a gliding hood is provided additionally on the outer casing of said speed differentiator, by the dynamic steering capability of the planet gear, power transmitting on the output gear assembly may be delivered by the planet gear active in direct or reverse rotation, moreover, by the displacement of the gliding hood on the outer casing of the speed differentiator the power being transmitted by the planet gear in direct or reverse rotation may be delivered way to the speed differentiator, eventually as output by way of the output shaft on the output end on both sides of the speed differentiator, thus controlling the vehicle to move forwards or backwards, with the input gear and the output gear devoted solely to take charge of speed regulation without regard to direction of vehicle movement, forwards or backwards, thus making possible structural simplif

Abstract: An infinitely variable forward speed mechanical transmission uses asymmetric helical/spur gear trains mounted to rotate within a rotor assembly to reduce the torque output within the rotor assembly through inefficiency of the asymmetric gear trains. The rotor assembly includes integrated input and output hubs having adjacent radially flush outer control surfaces, with the output hub in mesh with the asymmetric helical/spur gear trains in mesh with an output shaft. A transmission speed control device connected to a control gear connected to a control tang of a wrap spring positioned about the control surfaces of the input and output hubs provides infinitely variable control of the relative rotation of the two hubs to selectively control the torque output of the transmission.