The invention is an improvement for the infinitely variable transmission (IVT) that utilizes oscillating torque to vary the mechanical power transmitted to a load. The invention provides the torque amplitude control system that is a compact device that adjusts the torque amplitude by controlling the phase angle between the forward and aft drive units for the IVT. The IVT is transmission which transfers the engine torque and power to the driveshaft, differential and wheels of an automobile. The torque is generated from centrifugal forces of masses in the forward and aft drive unites of the input assembly.

The invention is an improvement for the infinitely variable transmission (IVT) that utilizes oscillating torque to vary the mechanical power transmitted to a load. The invention provides the torque amplitude control system that is a compact device that adjusts the torque amplitude by controlling the phase angle between the forward and aft drive units for the IVT. The IVT is transmission which transfers the engine torque and power to the driveshaft, differential and wheels of an automobile. The torque is generated from centrifugal forces of masses in the forward and aft drive unites of the input assembly.

A uni-directional drive gear includes a plurality of teeth each pivotably mounted on a mounting seat to be turned between driving and idle positions so as to permit the gear to rotate in a uni-rotational direction. A gear transmission device having the uni-directional drive gear can be configured to perform different transmissions to suit a wide variety of requirements.

A uni-directional drive gear includes a plurality of teeth each pivotably mounted on a mounting seat to be turned between driving and idle positions so as to permit the gear to rotate in a uni-rotational direction. A gear transmission device having the uni-directional drive gear can be configured to perform different transmissions to suit a wide variety of requirements.

In a continuously variable transmission (CVT) system, an input shaft receives power from an external source and rotates an intermediate mechanism that converts the rotation to an oscillatory movement and converts the oscillatory movement to a one-way rotation that drives an output shaft, with transmission ratio according to load on the output shaft.

In a continuously variable transmission (CVT) system, an input shaft receives power from an external source and rotates an intermediate mechanism that converts the rotation to an oscillatory movement and converts the oscillatory movement to a one-way rotation that drives an output shaft, with transmission ratio according to load on the output shaft.

A stepless transmission 1 is provided for preventing drive wheels from being driven despite the driver's intention during vehicle deceleration. A control device 40: when the required drive force of the vehicle is 0, controls the output rotational speed Ne of a travel drive source 50 to be Ne2, and controls the transmission gear ratio i of the transmission 1 so that the transmission 1 in the case where the Ne is Ne1 changes from a first state to a second state; and when the vehicle speed V is less than a boundary speed Vgn, controls the ratio i to be a state maintaining transmission gear ratio ign that enables the first state to be maintained even during vehicle deceleration. In the second state a rotational drive force is transmitted from an input shaft 2 to an output shaft 3. In the first state the transmission is prevented.

A stepless transmission 1 is provided for preventing drive wheels from being driven despite the driver's intention during vehicle deceleration. A control device 40: when the required drive force of the vehicle is 0, controls the output rotational speed Ne of a travel drive source 50 to be Ne2, and controls the transmission gear ratio i of the transmission 1 so that the transmission 1 in the case where the Ne is Ne1 changes from a first state to a second state; and when the vehicle speed V is less than a boundary speed Vgn, controls the ratio i to be a state maintaining transmission gear ratio ign that enables the first state to be maintained even during vehicle deceleration. In the second state a rotational drive force is transmitted from an input shaft 2 to an output shaft 3. In the first state the transmission is prevented.

In a continuously variable transmission (CVT) system, an input shaft receives power from an external source and rotates an intermediate mechanism that converts the rotation to an oscillatory movement and converts the oscillatory movement to a one-way rotation that drives an output shaft, with transmission ratio according to load on the output shaft.