Engine torque truncation method for a four-wheel drive vehicle

Details Engine torque truncation method for a four-wheel drive vehicle Engine torque truncation method for a four-wheel drive vehicle

2005-08-17

2008-07-08

Hurley, Kevin (Department: 3611)

Motor vehicles

With means for detecting wheel slip during vehicle...

C180S247000, C477S181000

Reexamination Certificate

active

07395891

ABSTRACT:
A four wheel drive powertrain control for an automotive vehicle is disclosed. It includes a torque transfer case that distributes power from an engine-powered transfer case mainshaft to a secondary driving axle through a friction clutch as power is distributed directly from the engine-powered mainshaft to a primary driving axle. The friction clutch capacity is sufficient to mechanically lock the transfer case in a four wheel drive mode. If the clutch torque capacity is exceeded, a control algorithm will strategically ramp down engine torque requests by a powertrain controller to eliminate clutch slip.

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