| 主权项 |
1. A control system for a four-wheel-drive vehicle including a driving power source, primary drive wheels, secondary drive wheels, and a rotation member, the control system comprising:
a transfer connected to the rotation member constituting a part of a first power transmission path between the driving power source and the primary driving wheels, the transfer configured to distribute dynamic power of the driving power source to the secondary drive wheels; a driving power transmission shaft configured to transmit the dynamic power of the driving power source distributed by the transfer to the secondary drive wheels; a connection-disconnection mechanism disposed in a second power transmission path between the rotation member and the driving power transmission shaft, the connection-disconnection mechanism configured to cut off and establish the second power transmission path; a first clutch disposed in a third power transmission path between the driving power transmission shaft and a left wheel of the secondary drive wheels, the first clutch configured to change a transmission torque; a second clutch disposed in a fourth power transmission path between the driving power transmission shaft and a right wheel of the secondary drive wheels, the second clutch configured to change a transmission torque; an electronic control unit configured to switch, on the basis of a vehicle running state, between a two-wheel-drive running state in which the connection-disconnection mechanism, the first clutch, and the second clutch are disengaged and a four-wheel-drive running state in which the connection-disconnection mechanism, the first clutch, and the second clutch are engaged, the electronic control unit configured, when switching from the two-wheel-drive running state to the four-wheel-drive running state, to generate a transmission torque in the at least one of the first clutch or the second clutch after controlling the connection-disconnection mechanism to engage the connection-disconnection mechanism. |
