Control device for turbocharger

A VN opening control is executed only if a condition that an accelerator is off, a condition that a clutch device is in a disengaged state, a condition that a gas flow rate is greater than or equal to a threshold value, a condition that an engine rotation speed is decreasing, a condition that a vehicle speed is less than or equal to a threshold value, a condition that an atmospheric pressure is greater than or equal to a threshold value, a condition that an engine coolant temperature is greater than or equal to a threshold value, a condition that an intake air temperature is greater than or equal to a threshold value, a condition that a throttle opening degree is greater than or equal to a threshold value, and a condition that a fuel injection amount is less than or equal to a threshold value are all fulfilled.