US Patent 10443713 Control device for vehicle drive system

An upshift target turbine rotational speed and a target primary rotational speed are calculated based on a target input shaft rotational speed restricted in a range of an upper limit guard value to a lower limit guard value. Thus, the difference between the upshift target turbine rotational speed and the target primary rotational speed is suitably decreased. When a torque transmission path is switched from a second transmission path to a first transmission path, the difference between an actual turbine rotational speed at a switching start time point and the actual turbine rotational speed at a switching completion time point is reduced.