System for controlling torque transmission in a four wheel drive

Details System for controlling torque transmission in a four wheel drive System for controlling torque transmission in a four wheel drive

1989-06-13

1991-02-05

Marmor, Charles A.

Motor vehicles

With means for detecting wheel slip during vehicle...

74866, 180248, 36442603, 475150, B60K 17344

Patent

active

049896865

ABSTRACT:
A control system for a full time four wheel drive vehicle having a transfer case including a planetary gear differential and an electromagnetically actuated clutch assembly for biasing torque between the front and rear drive wheels in response to signals from the control system. The control system includes apparatus for detecting wheel slip and a device, responsive to the detection of wheel slip for calculating a maximum torque level to be established by the clutch assembly as a function of the total torque delivered to the transfer case and for programming clutch torque application over a predetermined time period and in a manner biasing torque through the differential to eliminate wheel slip.

REFERENCES:
patent: 3627072 (1971-12-01), Smirl
patent: 3894446 (1975-07-01), Snoy et al.
patent: 3915023 (1975-10-01), Ottemann
patent: 3923113 (1975-12-01), Pagdin
patent: 4343205 (1982-08-01), Dzida
patent: 4601359 (1986-07-01), Weismann et al.
patent: 4644823 (1987-02-01), Mueller

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