Four wheel drive assembly and a method for utilizing the same

Details Four wheel drive assembly and a method for utilizing the same Four wheel drive assembly and a method for utilizing the same

2006-10-24

2006-10-24

Morris, Lesley D. (Department: 3611)

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

C701S069000

Reexamination Certificate

active

07124850

ABSTRACT:
A four wheel drive assembly10including a torque transfer assembly60which operates under the control of the controller62and which receives and selectively transfers a certain desired amount of torque to a front axles14, 15and to the rear axles14 17.The amount of transferred torque varies depending upon the occurrence of a sensed slip condition the use of a pre-emptive slip control mode of operation in which the controller62determines that it is likely that a slip may occur. Particularly, controller62is allowed to enter the preemptive mode of operation only after an actual slip has occurred and the controller62exits this preemptive mode of operation upon the occurrence of a certain event or condition or upon the passage of a certain amount of time.

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