Patent ID: 9114795
Filing Date: 2015-08-25
Classification: B60K,B60W,B60Y

Abstract:
1. A control device for a four-wheel drive vehicle comprising: a driving force distributor provided between a main drive shaft, which is either one of a front shaft and a rear shaft, and a sub-drive shaft, which is the other one of the front and rear shafts, the driving force distributor being configured to variably change driving force distribution between the main drive shaft and the sub-drive shaft; a first clutch provided on the sub-drive shaft and provided between the driving force distributor and a left wheel to engage and disengage transmission of driving force to the left wheel, a second clutch provided on the sub-drive shaft and provided between the driving force distributor and a right wheel to engage and disengage transmission of driving force to the right wheel, a target yaw moment calculator to calculate, as a target yaw moment, a yaw moment applied to the vehicle based on the operation state of the vehicle; and a controller configured to control one of the first and second clutches for a turning outer wheel of the sub-drive shaft to be engaged and the other of the first and second clutches for a turning inner wheel of the sub-drive shaft to be disengaged, and control the driving force distributor based on the target yaw moment, when an average wheel speed of the right and left wheels of the main drive shaft is more than a wheel speed of a turning outer wheel of the sub-drive shaft, wherein the first and second clutches transmit the driving force to each of the left and right wheels only by engaging or disengaging the driving force distributor and each of the left and right wheels without a differential mechanism.