Vehicle control device

A control device for a vehicle including a variable compression ratio mechanism arranged to vary an engine compression ratio of an internal combustion engine between a high compression ratio, a low compression ratio, and an intermediate compression ratio between the high compression ratio and the low compression ratio, and a torque converter which includes a lock-up mechanism, and which is disposed between the internal combustion engine and a transmission, the control device comprising:

• a controller configured to switch the lock-up mechanism between a lock-up OFF state to a lock-up ON state based on a map comprising:
• a first driving region in which the lock-up mechanism is brought to the lock-up OFF state at the high compression ratio,
• a second driving region in which the lock-up mechanism is brought to the lock-up ON state at the low compression ratio, and
• a third driving region which is positioned between the first driving region and the second driving region, and in which the lock-up mechanism is brought to the lock-up OFF state at the intermediate compression ratio,
• wherein the first to third driving regions are defined by a rotation speed of the internal combustion engine and an engine load of the internal combustion engine.