CLUTCH CONTROL DEVICE FOR FOUR-WHEEL-DRIVE VEHICLE

摘要

A vehicle clutch control device is provided for switching from a two-wheel drive traveling to a four-wheel drive traveling. The vehicle clutch control device includes a dog clutch that separates a rear wheel drive from a front wheel drive by releasing the dog clutch, an electronically controlled coupling that distributes a driving force of a transverse engine to left and right rear wheels in accordance with a clutch connection capacity, and a four-wheel drive control unit. The four-wheel drive control unit switches the drive mode to one of a disconnect two-wheel drive mode in which the dog clutch and the electronically controlled coupling are released, a connect four-wheel drive mode in which the dog clutch and the electronically controlled coupling are engaged, and a stand-by two-wheel drive mode in which the dog clutch is engaged while the electronically controlled coupling is released.

主权项

1. A vehicle clutch control device for a four-wheel drive vehicle having a pair of main drive wheels connected to a driving source and a pair of, auxiliary drive wheels selectively connected to the driving source, the clutch control device comprising:
a drive mode switching unit configured to perform a switching control of a drive mode of the vehicle based on a vehicle state; a dog clutch operatively disposed in a transmission path between the main drive wheels and the auxiliary drive wheels to separate a system for transmitting drive force to the auxiliary drive wheels from a system for transmitting drive force to the main drive wheels by releasing the dog clutch; and a friction clutch operatively disposed in a transmission path between the main drive wheels and the auxiliary drive wheels to allocate a portion of the drive force from the driving source to the auxiliary drive wheels in accordance with a clutch engagement capacity of the friction clutch, the drive mode switching unit being configured to switch the drive mode of the vehicle between a disconnect two-wheel drive mode a connect four-wheel drive mode and a stand-by two wheel drive mode, the dog clutch and the friction clutch being released in the disconnect two-wheel drive mode, the dog clutch and the friction clutch being engaged in the connect four-wheel drive mode, the dog clutch being engaged and the friction clutch being released in the stand-by two wheel drive mode.