Vehicle control apparatus

A control apparatus for a vehicle provided with:

• (i) an engine;
• (ii) a first motor/generator;
• (iii) a second motor/generator which is operatively connected to an intermediate power transmitting member;
• (iv) a differential mechanism having a first rotary element to which the engine is operatively connected, a second rotary element to which the first motor/generator is operatively connected, and a third rotary element to which the intermediate power transmitting member is connected;
• (v) a step-variable transmission which constitutes a part of a power transmitting path between the intermediate power transmitting member and drive wheels and which is placed in a selected one of a plurality of speed positions with engagement of a selected one or ones of a plurality of coupling devices;
• and (vi) an electric power storage device to and from which an electric power is supplied from and to the first motor/generator and the second motor/generator,
• said control apparatus comprising:
• a transmission shifting control portion configured to implement a shifting action of the step-variable transmission from one of the plurality of speed positions to another of the plurality of speed positions, by controlling a releasing action of a releasing coupling device and an engaging action of an engaging coupling device, the releasing coupling device being one of the plurality of coupling devices which has been placed in an engaged state before initiation of the shifting action, the engaging coupling device being another of the plurality of coupling devices which is to be placed in the engaged state after completion of the shifting action;
• a hybrid control portion configured to control an output torque of the first motor/generator and an output torque of the second motor/generator, based on an output torque of the engine and a transmitted torque to be transmitted through an initiative coupling device that is one of the releasing coupling device and the engaging coupling device, which causes the shifting action to progress, such that a rotational acceleration value of the second motor/generator and a rotational acceleration value of the engine are changed along respective target trajectories during the shifting action of the step-variable transmission;
• and
• a target-trajectory setting portion configured to set the target trajectories of the rotational acceleration value of the second motor/generator and the rotational acceleration value of the engine, based on a maximum charging amount of the electric power that can be charged to the electric power storage device and a maximum discharging amount of the electric power that can be discharged from the electric power storage device.