Control apparatus for vehicle

A control apparatus that is applied to a vehicle including an engine and a step automatic transmission, the control apparatus comprising:

• an input torque acquisition unit configured to acquire an input torque to be input to an input shaft of the automatic transmission;
• a clutch torque acquisition unit configured to acquire a clutch torque that is a maximum transmissive torque of a clutch to be operated when a gear stage of the automatic transmission is changed;
• a torque determination unit configured to, where a state in which one of the input torque and the clutch torque is greater than the other one of the input torque and the clutch torque is a first state and a state in which the other one of the input torque and the clutch torque is greater than the one of the input torque and the clutch torque is a second state, determine a change of the input torque and the clutch torque from the first state to the second state;
• a gear ratio calculation unit configured to calculate an intermediate gear ratio that is a gear ratio between a pre-shift gear ratio and a post-shift gear ratio, the pre-shift gear ratio being a gear ratio of the automatic transmission, which is determined from a gear stage before change, the post-shift gear ratio being a gear ratio of the automatic transmission, which is determined from a gear stage after change;
• and
• a torque calculation unit configured to, on condition that the torque determination unit determines a change of the input torque and the clutch torque from the first state to the second state, execute a torque calculation process that is a process of calculating a target engine torque of the engine based on the intermediate gear ratio calculated by the gear ratio calculation unit.