Pulley propulsion device of automatic transmission and control device for automatic transmission

A pulley propulsion device for an automatic transmission, provided in the automatic transmission including:

• a fixed pulley;
• and
• a movable pulley constituted capable of relative displacement along a rotation axis of a pulley with respect to the fixed pulley, comprising:
• a movable member constituted capable of relative rotation around a rotation axis of the pulley with respect to the movable pulley;
• a fixed member whose rotation with respect to a pulley case is regulated and adapted to give linear displacement to the movable member along the rotation axis of the pulley on the basis of rotation thereof;
• a driving mechanism having an electric motor and adapted to cause an output torque of the electric motor to be transmitted to the movable member and to cause the movable pulley to generate a predetermined pulley thrust;
• and
• a load sensor adapted to detect a load applied on the fixed member, the load sensor being disposed correspondingly to a belt wound region of the movable pulley in the circumferential direction around the rotation axis of the pulley.