![]() ![]() ![]() This patent describes a power transmission device with an improved differential motion limiting mechanism for a four wheel drive vehicle having automatic transmission means, front wheel differential gear means, differential motion limiting means and transfer unit means including center differential gear means, comprising: a first gear mount casing having a gear adapted to mesh with an output of a transmission a differential motion limiting device arranged together with a front wheel differential gear in the first gear mount casing. Power transmission device for four wheel drive vehicleÄOE Office of Scientific and Technical Information (OSTI.GOV) By means of a microcomputer, the engagement of the clutch is changed to insure that the ratio of the torque sensors remains constant. Revolution count sensors sense the revolutions of each drive shaft. A second sensor senses the drive torque associated with the front wheel drive shaft. One torque sensor senses the drive torque associated with the rear wheel drive shaft. The internal rotation torque generated during operation of a 4- wheel drive vehicle is reduced using a control device whose clutch is attached to one part of the rear- wheel drive shaft. ![]()
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