DRIVING FORCE DISTRIBUTION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a driving force distribution control device capable of preventing abnormal vibration in a driving force transmitting system when an operation state is in an abnormal vibration generating range. SOLUTION: A driving force transmitting mechanism 10 in a four-wheel drive vehicle 1 transmits driving force of an engine 6 to wheels 2-5. The driving force transmitting mechanism 10 is provided with a coupling 15, and the coupling 15 distributes the driving force to the wheels 2-5 at a specified ratio. An electronic control unit 31 controls the coupling 15. A CPU of the electronic control unit 31 determines if the operation state of the four-wheel drive vehicle 1 is in the abnormal vibration generating range where abnormal vibration is generated in the driving force transmitting mechanism 10 or not based on the operation state of the four-wheel drive vehicle 1. The CPU controls the coupling 15 in such a way that the driving force is distributed to the wheels 2-5 at such a specific ratio that abnormal vibration is not generated when it is determined that the operation state is in the abnormal vibration generating range.