Patent ID: 8568275

Claim:
A control device for controlling a hybrid vehicle drive device that includes an input member drivingly coupled to at least one of an internal combustion engine and a rotating electrical machine as driving force sources of a vehicle, an output member drivingly coupled to a wheel, a fluid coupling with a direct coupling clutch for transmitting rotation of the input member to a shift input member, and a speed change mechanism for shifting rotation of the shift input member at a speed ratio of a gear-shift stage that is selectively formed, and transmitting the shifted rotation to the output member, wherein when performing a downshift to a gear-shift stage of a higher speed ratio or an upshift to a gear-shift stage of a lower speed ratio in the speed change mechanism from a state in which an engagement pressure of the direct coupling clutch is equal to or higher than a direct coupling limit engagement pressure that is an engagement pressure at which the direct coupling clutch starts to slip, the control device controls the engagement pressure of the direct coupling clutch to a pressure lower than the direct coupling limit engagement pressure during the downshift, when performing the downshift in a state in which required input torque, which is torque that is required to be transferred to the input member, is set to a positive torque, and the control device controls the engagement pressure of the direct coupling clutch to a pressure equal to or higher than the direct coupling limit engagement pressure during the downshift or the upshift, when performing the downshift in a state in which the required input torque is set to a negative torque, or when performing the upshift regardless of the required input torque.