Transfer case shift-on-fly system

Details Transfer case shift-on-fly system Transfer case shift-on-fly system

1990-12-07

1992-04-21

Hill, Mitchell J.

Motor vehicles

Having four wheels driven

With manually operated means for disengaging drive to one or...

180249, 180250, B60K 2308

Patent

active

051059029

ABSTRACT:
The present invention provides a motor vehicle cold shift assist system for selectively actuating an axle connecting mechanism to automatically connect the non-driven wheels to its associated axle drive mechanism immediately following synchronization for counteracting the inertial loading acting on the transfer case synchronizer clutch mechanism. The axle connecting mechanism is actuated prior to the transfer case being locked in the four-wheel drive mode. As such, the present invention substantially reduces the shift resistance and gear clash encountered upon the vehicle operator shifting into the four-wheel drive mode during cold weather conditions.

REFERENCES:
patent: 2913929 (1959-11-01), Anderson
patent: 4341281 (1982-07-01), Nagy
patent: 4381828 (1983-05-01), Lunn et al.
patent: 4677873 (1987-07-01), Eastman et al.
patent: 4770280 (1988-09-01), Frost
patent: 5033575 (1991-07-01), Takeshita et al.

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