| 摘要 |
PURPOSE:To improve a rough road traveling property, etc. by automatically locking a differential-lock device when traveling at a low speed including stopping except when making a turn, in the captioned vehicle having a center differential gear and said differential-lock device midway in the driving system of front and rear wheels. CONSTITUTION:A center differential gear 19 is provided at the rear end of an output shaft 5 of a transfer device 18 at the rear of a transmission 4, and a differential lock device 30 is provided between the side gear 23 of this gear 19 and an output shaft 5 on a differential pinion 21 side. This differential-lock device 30 is controlled in its operation by an operating device 31 including a negative-pressure actuator 34. A negative pressure or the atmosphere is introduced into the negative pressure chambers 36a, 36b of the actuator 34 via releasing and locking solenoid valves 38a, 38b. When traveling at a low speed including stopping except when making a turn, the the solenoid valves 38a, 38b are controlled so as to lock the differential lock device 30 by means of a control circuit 42 into which the signals of a car speed sensor 40 and a steering angle sensor 41 are inputted.
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