| 摘要 |
PURPOSE:To attempt to enhance torque transmission responsiveness and a torque transmission amount to a wheel having a high friction coefficient by using magnetic fluid as work fluid, and pulling this magnetic fluid toward one side or other side of a working chamber by magnetic force. CONSTITUTION:As resistance acting on a front wheel driving shaft is small when a front wheel slips while a vehicle travels on a rough road of a low friction coefficient, torque transmitted to this front wheel is exhibited to small extent only. As turning amount of a rear wheel is smaller than that of the front wheel driving shaft at that time, a second rotary member 24 connected to a rear wheel driving shaft turns with turning amount smaller than that of a first rotary member 21 connected to the front wheel driving shaft, thereby a rotational difference is generated between the front wheel driving shaft and the rear wheel driving shaft, and a first resistance part 28 and a second resistance part 29 relatively rotate to shutdown the magnetic fluid. If an exciting current is fed to an electro-magnet 30 at this time, the magnetic fluid is pulled toward one side of a working chamber 27. Thus, the magnetic fluid filled in the chamber 27 is shutdown by the resistance parts 28 and 29. |
