Two-wheel drive mode for full-time transfer case

Details Two-wheel drive mode for full-time transfer case Two-wheel drive mode for full-time transfer case

1989-11-16

1991-09-10

Braun, Leslie A.

Planetary gear transmission systems or components

Differential planetary gearing

Differential or nondifferential planetary combined with...

475225, 475204, 180247, F16H 3708

Patent

active

050469983

ABSTRACT:
A transfer case for a four wheel drive vehicle providing a drive range planetary gear set selectively positionable at a low speed output position, a high speed output position and a neutral position; having a dual planetary inter-axle differential gear set axially spaced from the range planetary gear set. The differential gear set is selectively positionable to provide a two-wheel drive mode to a first output and a full-time four-wheel drive mode with differential action between the first output and a second output. A viscous fluid clutch is selectively connected between the first and second outputs for modifying torque division therebetween whereby the viscous clutch is disconnected upon shifting into the two-wheel drive mode.

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patent: 4677875 (1987-07-01), Batchelor
patent: 4876919 (1989-10-01), Nagano et al.

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