Patent ID: 7549945
Filing Date: 2009-06-23
Classification: B60K,B60W,F16H,Y02T,Y10T

Abstract:
1. A control apparatus for a vehicular drive apparatus that includes a differential portion that includes a differential mechanism that distributes an output from an engine to a first motor and a transmitting member; a power transmission portion that is provided in a power transmission path from the differential portion to a driving wheel; and an engagement device that can switch a state of the power transmission path between a power-transmission permitted state and a power-transmission interrupted state, and a switching device whose position is selectively switched between a drive position for switching the state of the power transmission path to the power-transmission permitted state using the engagement device, and a non-drive position for switching the state of the power transmission path to the power-transmission interrupted state using the engagement device, wherein the control apparatus controls the engagement device that switches the state of the power transmission path from the power-transmission interrupted state to the power-transmission permitted state when the position of the switching device is switched from the non-drive position to the drive position; the control apparatus comprising: a first torque control portion that controls a torque output from the power transmission portion to the driving wheel, by gradually changing an engagement pressure for the engagement device, when the position of the switching device is switched from the non-drive position to the drive position while the engine is operating; a second torque control portion that controls the torque output from the power transmission portion to the driving wheel, by gradually changing a reaction torque borne by the first motor while the power transmission path is in the power-transmission permitted state, and the engagement device has an engagement capacity, when the position of the switching device is switched from the non-drive position to the drive position while the engine is operating; a torque control selection portion that selects one of the first torque control portion and the second torque control portion as a control portion that controls the torque output from the power transmission portion, based on a vehicle condition, when the position of the switching device is switched form the non-drive position to the drive position while the engine is operating; a second motor that is operatively connected to the transmitting member; and synchronization control portion that executes a control that minimizes a relative rotational speed difference in the engagement device, using the first motor and the second motor, when the position of the switching device is switched from the non-drive position to the drive position while the engine is operating; wherein the torque control selection portion selects the first torque control portion when the position of the switching device is switched from the non-drive position to the drive position, and the synchronization control portion cannot execute the control that minimizes the relative rotational speed difference.