| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device of a four-wheel drive vehicle for suppressing vibration or abnormal sound caused by torque fluctuations in a vehicle having a power transmission mechanism comprising two hydraulic pumps and a hydraulic clutch that operates in accordance with the differential pressure thereof. <P>SOLUTION: The control device calculates (S10, S12) a clutch differential rotation of a hydraulic clutch, to which working oil at a pressure responding to the difference in discharge pressure between a first hydraulic pump and a second hydraulic pump is supplied and which links an input shaft and an output shaft and distributes a drive force of a drive source. The first hydraulic pump is linked to the input shaft connected to a front wheel of the vehicle, pressurizes the working oil to a pressure responding to the rotational speed of the front wheel, and discharges the oil; and the second hydraulic pump is linked to the output shaft connected to a rear wheel, pressurizes the oil to a pressure responding to the rotational speed of the rear wheel, and discharges the oil. The control device then calculates (S14) a clutch torque based on the calculated clutch differential rotation, and decreases (S16 to S22) the drive force of the drive source when a condition of fluctuations in the calculated clutch torque being equal to or over a predetermined value continues for predetermined time or longer. <P>COPYRIGHT: (C)2013,JPO&INPIT |
