Electronic control for vehicle four wheel drive system

Details Electronic control for vehicle four wheel drive system Electronic control for vehicle four wheel drive system

1992-10-28

1993-09-21

Black, Thomas G.

Boots, shoes, and leggings

3644241, 36442601, 180249, B60K 1735

Patent

active

052474437

ABSTRACT:
A microcomputer-based electronic control system for a full time four wheel drive torque transfer case monitors the relative slip between the front and rear output shafts of the transfer case, and generates a signal to engage an electromagnetic clutch for a predetermined time period in the event a first predetermined slip threshold is exceeded. In the event the driver has actuated the vehicle service brakes, the electromagnetic clutch is only engaged if the relative slip is less than a second predetermined slip threshold greater than the first predetermined slip threshold.

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patent: 4886141 (1989-12-01), Ikegami et al.
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