| 摘要 |
PURPOSE:To make the miniaturization of a differential gear come to fruition, by controlling a distribution ratio controller so as to cause the extent of distribution torque to one side of front and rear wheels not to exceed the maximum value, in case of a device which has a distribution controller controlling a distribution ratio of driving torque to both front and rear wheels. CONSTITUTION:In this four-wheel drive vehicle, an automatic transmission 2 and a 4WD transfer unit 3 are connected to an output shaft of an internal combustion engine 1. The transfer unit 3 is selectively connected to a planetary gear type center differential gear 10 for full-time 4WD use, its sun gear 13 and a ring gear 14. This unit is provided with a differential control clutch 21 as a driving torque distribution controller. In this case, a hydraulic controller 22 driving the differential control clutch 21 is controlled by a controller 45 so as to cause distribution torque to either of front wheels or rear wheels not to exceed the specified maximum value as receiving an output signal out of an input torque sensor 49. With this constitution, large torque is made so as not to act on a front differential gear 30, whereby its miniaturization is promoted.
|
