Control device for vehicle driving device

A control device for controlling a vehicle driving device provided with a transmission apparatus including a plurality of engagement devices in a power transmission path between a driving force source and a wheel and selectively forming a plurality of transmission shift stages having different transmission shift ratios depending on engagement states of the plurality of engagement devices, the control device comprising:

• an electronic control unit that includes control logic, which when executed:
• starts upshift control for switching to a transmission shift stage having a lower transmission shift ratio,
• performs torque phase control for increasing an engagement pressure of an engagement side engagement device to be engaged for the switching to the transmission shift stage, the engagement side engagement device being one of the plurality of engagement devices, and reducing an engagement pressure of a release side engagement device to be released for the switching to the transmission shift stage, the release side engagement device being one of the plurality of engagement devices, and
• performs inertia phase control for increasing a rotation speed difference of the release side engagement device and reducing a rotation speed difference of the engagement side engagement device to perform a rotation change after starting the torque phase control,
• wherein the electronic control unit performs torque down control for reducing a torque of the driving force source in the inertia phase control and changes a start timing of the torque down control relative to an execution timing of the torque phase control according to at least a pre-transmission shift torque, which is the torque of the driving force source before starting the upshift control.