All wheel drive/four wheel drive transfer case with...

Details All wheel drive/four wheel drive transfer case with... All wheel drive/four wheel drive transfer case with...

2005-09-13

2005-09-13

Lewis, Tisha (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Sun braked

C475S204000, C475S206000, C475S213000, C475S295000, C475S303000, C475S330000, C180S233000, C180S247000, C192S053340, C192S048910

Reexamination Certificate

active

06942592

ABSTRACT:
A drivetrain for a vehicle includes front and rear axles and a transfer case including two planetary gear sets and four clutches. The first member of the first planetary gear set is continuously connected with the first member of the second planetary gear set and the rear axle. The third member of the first planetary gear set is continuously connected to the second member of the second planetary gear set and the front axle through a transfer chain. An input is selectively connectable with the first member of the first planetary gear set through a first clutch, connectable with the second member of the first planetary gear set through a second clutch, and connectable with the third member of the first planetary gear set through a third clutch. A fourth clutch selectively connects the third member of the second planetary gear set with ground. The first, second, third and fourth clutches are selectively engageable to provide front wheel drive high, four wheel drive high, all wheel drive mid, four wheel drive mid, rear wheel drive low and four wheel drive low ratios between the input and the front and rear axles.

REFERENCES:
patent: 4349091 (1982-09-01), Miyake et al.
patent: 5989146 (1999-11-01), Brown et al.
patent: 6142905 (2000-11-01), Brown et al.
patent: 6464612 (2002-10-01), Frost
patent: 6575867 (2003-06-01), Stephens et al.

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